HP 85662A Troubleshooting And Repair Manual
  1. Manuals
  2. Brands
  3. HP Manuals
  4. Measuring Instruments
  5. 85662A
  6. Troubleshooting and repair manual

HP 85662A Troubleshooting And Repair Manual

Spectrum analyzer if-display section
Hide thumbs Also See for 85662A:
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
Table Of Contents
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
Table of Contents

Advertisement

Quick Links

Download this manual
Microfiche Part No. 85662-90086
HP Part No. 85662-90085
December 1990
Printed in USA

Advertisement

Table of Contents
loading

Related Manuals for HP 85662A

Summary of Contents for HP 85662A

  • Page 1 Microfiche Part No. 85662-90086 HP Part No. 85662-90085 December 1990 Printed in USA...
  • Page 2 @Copyright Hewlett-Packard Company 1990 All Rights Reserved. Reproduction, adaptation, or translation without prior written permission is prohibited, except as allowed under the copyright laws. 1212 Valley House Drive, Rohnert Park, CA 94928-4999, USA...
  • Page 3 For warranty service or repair, this product must be returned to a service facility designated by HP. Buyer shall prepay shipping charges to HP and HP shall pay shipping charges to return the product to Buyer. However, Buyer shall pay all shipping charges, duties, and taxes for products returned to HP from another country.

  • Page 4: Safety Symbols

    Safety Symbols The following safety symbols are used throughout this manual. Familiarize yourself with each of the symbols and its meaning before operating this instrument. The caution sign denotes a hazard. It calls attention to a procedure which, Caution if not correctly performed or adhered to, could result in damage to or destruction of the instrument.
  • Page 5 General information on the contents of the manual, including storage, IF-Display Section shipment, and packaging. General Information Mnemonic Table, Instrument Bus Pin Connection Table, and Overall IF Overall Block IF Block Diagram. Diagram Al Display Section Troubleshooting information, Block Diagram, and Al Display Section A3 Digital Storage Troubleshooting information, Block Diagram, and A3 Digital Storage...

  • Page 6: Hp Part Number

    Instruments Covered by This Manual HP 85662A IF-Display Sections, serial number prefixes 2403A and above. Option 067 (1 kHz to 3 MHz Resolution Bandwidths for the HP 8567A Spectrum Analyzer), Option 462 (Impulse Bandwidths) Option H96 (30 Hz-l MHz Resolution Bandwidths)
  • Page 7 Service Sheets The service sheets in this manual are organized in alpha-numeric order and are indexed with tabs to make it easy to locate a specific service sheet. Each of the service sheets contain the following information: Circuit Description (where practical) Troubleshooting Hints (where practical) Replaceable Parts Lists Block Diagram (where practical)
  • Page 8 All assemblies are indexed by tab except for the ones listed in Table 1 at the end of this section. Table 1 lists the index tabs where these assemblies can be found. Assembly Locations Assembly 1 Tab Location General Parts Listing, Table 6 General Parts Listing, Table 6 General Parts Listing, Table 4 Not Assigned...
  • Page 9 1. Separate the two instrument sections and wrap each in heavy paper or plastic. 2. Place the instrument sections in separate containers with 8 to 10 cm (3 to 4 inches) of shock-absorbing material around all sides to provide firm cushioning and prevent movement inside the container.
  • Page 10 Table 1. A3 Digital Storage Mnemonic Table IF Overall Block Diagram...
  • Page 11 Table 1. A3 Digital Storage Mnemonic Table (continued) 2 IF Overall Block Diagram...
  • Page 12 Table 2. BO-Wire Instrument Bus Pin Connection Table for IF-Display Section Description Pin Signal Description Signal Ground ADR4 Instrument Bus Address Bits 0 - 4 No Connection Instrument Bus Data Bits 0 - 15 ADRS Address Bit 5 not used IOBO Instrument Bus Data Bits 0 - 15 No Connection...
  • Page 15 Display Troubleshooting The Display system consists of four sections: Input Section Processor Section and A3A7 Interface CRT Driver Section Generator. CRT Amplifier Section Amplifier (Serial Prefixes 3004A and above) or AlA Z Axis Amplifier AlA X Deflection Amplifier and AlA Y Deflection Amplifier Isolation of a malfunction to one of the above sections is done with the use of rear-panel display outputs and the internal test programs.
  • Page 16 Video (Signal) Only If only the video information is incorrect, suspect A4 IF Section, A3A8, or A3A9. To eliminate the IF, connect the rear-panel SWEEP and VIDEO RECORDER OUTPUTS to an oscilloscope. If the video is correct, then either A3A8 or A3A9 is defective. Remove cable 96 from A3A9Jl.
  • Page 17 can cause the CRT to be disabled. If U14 is operating correctly, visually inspect the A4A9 assembly. Al 3...
  • Page 19 Status Indicators. CRT Controls (A) The CRT Controls include the following front-panel potentiometers: INTENSITY control Rl. Sets the level of the input to AlA 2 Axis Amplifier. ALIGN screwdriver adjustment R8. Sets the CRT trace to horizontal. FOCUS screwdriver adjustment R2. Focuses the CRT trace. FREQ ZERO screwdriver adjustment R3.
  • Page 20 F R O N T P A N E L V I E W q ocjb oocl Figure 1. Front Panel Control Knobs 3. Remove nut from INTENSITY control and from Video Trigger LEVEL control using a 4. The dress panel is now loose. It may be necessary to pry front panel out slightly using a sharp instrument such as a knife blade along the edge of the panel.
  • Page 21 6. The RECORDER pushbutton LEDs @ LOWER LEFT and UPPER RIGHT cannot be replaced as described in Step 5. To replace these LEDs, it is necessary to remove the pushbutton keys and the AlAl Keyboard. Remove key housing the defective LED by prying the key outward using a pointed instrument such as a soldering aid.
  • Page 22 Front Panel Removal and Repair 1. Remove adhesive trim strip (iJ from both sides of instrument. 2. Remove two screws QJ located under trim strip @ as shown in View A of Figure 3. Figure 3. Front Panel Removal and Repair, Side and Rear Views 3.
  • Page 23 5. Remove two screws @ (View A of Figure 4) from bottom of instrument used to secure front panel to frame. 6. Remove trim strip @ shown in View B of Figure 4, by inserting blade of small flat blade screwdriver into slot @ and lifting upwards.
  • Page 24 8. Place instrument in position shown in View A of Figure 5 and pull front panel forward to position shown. 9. Disconnect cable @ from AlAlO Motherboard as shown in View A of Figure 5. Disconnect cable @ at connector @@I and cable @@ at connector @)@ on A3AlO Motherboard.

  • Page 25: Table Of Contents

    HP Part Number 85662-60001 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 85662-60001 KEYBOARD ASSEMBLY 28480 85662-60001 0160-4084 CAP-FXD O.luF 50 V 56289 LED-LAMP LUM-INT=2MCD 1990-0485 28480 HLMP-1503 LED-LAMP LUM-INT=ZMCD BVR=5V 1990-0487 28480 HLMP-1401 LED-LAMP LUM-INT=2MCD BVR=5V...

  • Page 26: 7 1 Switch-Pb Spst-No Mom

    HP Part Number 85662-60001 Reference HP Part Mfr Part Description Designatior Number Code Number 5060-9436 7146E 5560-9436 5060-9436 SWITCH-P8 SPST-NO MOM 5560-9436 5060-9436 7146E 5560-9436 5060-9436 SWITCH-P8 SPST-NO MOM 7146E 5560-9436 5060-9436 SWITCH-PB SPST-NO MOM 7146E 5560-9436 5060-9436 SWITCH-PB SPST-NO MOM...
  • Page 28 K E Y B O A R D Al Front Panel Assembly and Component Locations...
  • Page 31 The AlA board assembly has two versions that have major differences. The change of the The original AlA assembly (Instrument Serial Number Prefixes 2403A-3001A) is the Z Axis Amplifier. It is used in conjunction with the AlA X Deflection Amplifier and the AlA Y Deflection Amplifer.
  • Page 32 (Serial Number Prefixes: 2403A-3001A) CRT: a 0 V - 2 V Z signal proportional to the CRT writing rate, and a blanking signal LBLANK. Amplifier @ The Z signal, after attenuation by the front-panel INTENSITY potentiometer AlRl, drives the input stage &g-&10. This amplifier supplies a differential current output to the Focus Gate Amplifier and, through a Blanking Switch, to the Control Gate Amplifier.
  • Page 33 (Serial Number Prefixes: 3004A and Above) Y Deflection Amplifier @I, @, @ The Y deflection amplifier consists of a single ended to differential voltage to current amplifier output to drive the positive and negative Y deflection plates of the CRT. The output has an average (common mode) voltage of approximately 55 V (equal to the first accelerator voltage of the CRT).
  • Page 34 Buffer Amplifiers @) There are two buffer amplifiers that are used to supply buffered copies of the Y signal to other uses. One, UlOlB, is used to drive the rear panel Aux Y output. The other copy of the Y signal is buffered by UlOlA and is used in the dynamic focus correction for beam position (see FOCUS below).
  • Page 35 Control Gate Amplifier &J The current to voltage amplifier output stage for the Z Axis amplifier is similar in concept to the one used in the X and Y Current to Voltage Amplifiers. There are some significant differences in the input stages however. The active load current source is formed by Q301, R301, R302, and R305.
  • Page 36 maximum. Typically it takes about -40 to -50 V correction from minimum to maximum brightness. Focus also needs to be “fine tuned” from the front panel. The front panel control is a 25~ pot with the two ends tied to +15 V and -15 V with the wiper brought to the AlA Front Panel Focus 0.
  • Page 37 R417 (CR409 prevents current from flowing into the U402B negative node) so R418 must have one volt across it and therefore the cathode of CR408 must be at plus two volts. R421 has plus one volt across it and therefore is conducting 0.5 mA into the negative node of U402A. R420 is drawing 0.25 mA from this same node so the difference, 0.25 mA, must be flowing out of this node through R423.
  • Page 38 HP Part Number 85662-60100 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60100 Z AXIS AMPLIFIER BOARD ASSEMBLY 28480 85662-60100 ES: 2403~-3001~) SERIAL PR 0180-0374 CAPACITOR-FXD lOUF+-10% 20VDC TA 56289 0180-0374 CAPACITOR-FXD lOUF+-10% 20VDC TA 56289 0160-3670 CAPACITOR-FXD .lUF +-20% POOVDC CER...
  • Page 39 HP Part Number 85662-60100 Al A2 Z Axis Amplifier Reference Mfr Part Description Designation Number Number C o d e 1854-0404 TRANSISTOR NPN SI TO-18 PO=360MW 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PO=360MW 0471: Al A2Q9 1853-0007 TRANSISTOR PNP 213251 SI TO-18 PO=360MW...

  • Page 40: Resistor 10K +-1% .125W Tf Tc=O

    HP Part Number 85662-60100 Axis Amplifier Reference HP Part C Mfr Part Description Designation Number D w Code Number 0757-0274 RESISTOR 1.21K +-1% .125W TF TC=O+-100 19701 0698-3440 RESISTOR 196 1% .125W TF TC=O+-100 19701 0757-0200 RESISTOR 5.62K +-1% .125W TF TC=O+-100...
  • Page 41 HP Part Number 85662.60236 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60236 XYZ DRIVER AMPLIFIER BOARD ASSEMBLY : 3004~) SERIAL PREFIX 0160-3670 CAP-FXO O.luF 200 V 0160-3026 CAP-FXO O.OluF 200 V 0160-3026 CAP-FXO O.OluF 200 V 0121-0474 CAP-VAR 3pF 1.5pF 600 V FEP...
  • Page 42 HP Part Number 85662-60236 Reference HP Part Mfr Part Description Designatior Number Code Number 0160-5913 CAP-FXO 36pF 200 V 06352 0160-4801 CAP-FXO 1OOpF 100 V 02011 0160-4835 CAP-FXO O.luF 50 V 0121-0474 CAP-VAR 3pF 1.5pF 600 V FEP 273-0001-002 0160-3670 CAP-FXO O.luF 200 V...
  • Page 43 HP Part Number 85662.60236 Reference HP Part Mfr Part Description Designatior Number Code Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 0004E 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 0004E...
  • Page 44 HP Part Number 85662-60236 Reference HP Part Mfr Part Description Designatior Number Code Number 1854-0523 TRANSISTOR NPN SI TO-39 PO=lW FT=lSOMHZ 02037 1854-0404 TRANSISTOR NPN SI TO-18 PO=360MW 02037 1853-0007 TRANSISTOR PNP 2N3251 SI TO-18 PO=360MW 02037 213251 1853-0232 TRANSISTOR PNP SI TO-39 PO=lW FT=ZOOMHZ...
  • Page 45 HP Part Reference Mfr Part Description Designation Number Code Number 0698-0084 RESISTOR 2.15K 1% .125W TF TC=O+-100 CR814 OR CR825 0757-0440 RESISTOR 7.5K +-1% .125W TF TC=O+-100 CR814 OR CRB25 2100-3353 RESISTOR-TRMR 20K 10% TKF SIDE-ADJ l-TRI 03744 3386X-146-203 0757-0444 RESISTOR 12.lK +-1% .125W TF TC=O+-100...
  • Page 46 HP Part Number 85662-60236 Reference HP Part Mfr Part Description Designatior Number Code Number 0757-0440 RESISTOR 7.5K +-1% .125W TF TC=O+-100 CRB14 OR CRB25 2100-3353 RESISTOR-TRMR 20K 10% TKF SIDE-ADJ l-TRN 3386X-Y46-203 0757-0444 RESISTOR 12.1K +-1% .125W TF TC=O+-100 CRB14 OR CRB25 0757-0428 RESISTOR 1.62K +-1% .125W TF TC=O+-100...
  • Page 47 HP Part Number 85662-60236 Reference HP Part C Mfr Part Description Designation Number Code Number 0757-0394 RESISTOR 51.1 +-1% .125W TF TC=O+-100 CRB14 OR CR825 00746 0698-3416 RESISTOR 21.5K 1% .5W TF TC=O+-100 01074 0757-0841 RESISTOR 12.1K +-1% .5W TF TC=O+-100 01074 RESISTOR 3.48K 1% .125W TF TC=O+-100...
  • Page 48 HP Part Number 85662-60236 Reference HP Part Mfr Part Description Designation Number Code Number 1360-0535 TERMINAL-TEST POINT .330IN ABOVE 04055 TERMINAL-TEST POINT .330IN ABOVE 04055 IC OP AMP H-SLEW-RATE DUAL 8-DIP-P PKG 02037 IC OP AMP H-SLEW-RATE DUAL 8-DIP-P PKG...
  • Page 50 q : N 0 ; 2 :z...
  • Page 51 Driver Amplifier Component Locations, 85662-60236...
  • Page 55 (Serial Number Prefixes: 2403A-3001A) Warning The CRT filament potential is connected to the -4000 V dc cathode potential, which is dangerous to life. The post-accelerator potential of approximately +18 kV is supplied by High Voltage Multiplier AlAll. Refer to block diagram. High-Voltage Transformer @ High-Voltage Rectifier and Filter @...
  • Page 56 Focus Grid Charge Level Shift @ The focus voltage is set by a resistive divider string from the cathode, with an intensity-focus correction bias developed in a manner similar to that of the control grid bias voltage described above. FOCUS LIMIT potentiometer R14 sets the focus grid to approximately -2500 V dc, and the focus bias is generated by a clipped sine wave at the junction of C9 and ClO.
  • Page 57 (Serial Number Prefixes: 3004A and Above) The High Voltage Regulator PC board couples the grid drive and focus control signals to their dc bias voltages to drive the CRT. It also provides mounting and interconnect for the AlASAl High Voltage Module to AlVl CRT and the AlA High Voltage Power Supply drive and control circuitry.
  • Page 58 -90 V, the adjustment range is adequate to change a 45 V Control Gate dark threshold signal into the desired cutoff voltage at the CRT grid. To turn the CRT on, the grid voltage must be raised more positive toward the cathode from the cutoff voltage.
  • Page 59 CRT Removal and Replacement (Serial Number Prefixes: 2403A-3001A) Warning This procedure should be performed by qualified personnel only. Voltages are present which, if contacted, could cause serious personal injury. Approximately -4000 V dc is present on the AlA High Voltage Regulator assembly even when the ac line cord is disconnected.
  • Page 60 Warning In the following step, a large arc of high voltage should be drawn. Be careful. Use only one hand during the procedure. 5. Locate the snap connector on the CRT post accelerator cable. It is shown as item @ in Figure 2.
  • Page 61 9. Connect the jumper wire from chassis ground to the black wire coming from the AlAll High-Voltage Multiplier at the wire’s connection to AlA3Tl. 10. Remove aII jumper wires. The AlVl CRT, the AlA High-Voltage Regulator, and the 11. Remove the bottom cover of the IF-Display section by loosening the screw 0 shown in Figure 1.
  • Page 62 Figure 4. CRT Replacement, Top View, (Serial Number Prefixes: 2403A-3001A) 16. Pull the CRT forward through the front of the instrument far enough to allow room at the rear of the CRT. It must be pulled out far enough to disconnect the plug @Q) from the socket at the rear of the CRT.

  • Page 63: Installation Procedures

    Installation Procedures 1. Insert the foam grommet at the rear of the shield. Install the CRT shields on the new CRT. Be careful that the post accelerator cable and the pins on the neck of the new CRT are not damaged when the shields are installed on the CRT. 2.
  • Page 64 CRT Removal and Replacement (Serial Number Prefixes: 3004A and Above) Warning This procedure should be performed by qualified personnel only. Voltages are present which, if contacted, could cause serious personal injury. Approximately -2400 V dc can be present on the AlA High Voltage Regulator assembly even when the ac line cord is disconnected.
  • Page 65 Figure 6. CRT Replacement, Top View, (Serial Number Prefixes: 3004A and Above) 5. Obtain an electrician’s screwdriver which has a thin blade at least eight inches long. The handle of the screwdriver must be made of an insulating material. 6. Connect one end of a jumper wire (made of insulated wire and two alligator clips) to the blade of the screwdriver.
  • Page 66 Grounding Wire Figure 7. Discharging the CRT Post Accelerator Cable (Serial Number Prefixes: 3004A and Above) 8. Touch the screwdriver’s tip to the top lead of each of the 11 large vertical capacitors on the AlA High Voltage Regulator assembly. 9.
  • Page 67 Installation Procedures 1. Assemble the new CRT into it shields. Slide the new CRT into the instrument through the front frame. 2. Replace the front panel. Refer to the Front Panel Removal and Repair procedure in the 3. The CRT must be aligned with the display area of the front panel. The CRT should fit snug against the glass shield of the front panel.
  • Page 68 HP Part Number 85662-60059 HP Part Reference Mfr Part Description Designatior Number Code Number 85662-60059 HIGH VOLTAGE REGULATOR BOARD ASSEMBLY 2848C 85662-60059 : 2403~-3001~) REFIXES 0160-4148 CAP-FXD 0.033uF 6 kV POLYE-MET 56289 0160-2264 CAPACITOR-FXD 20PF +-5% 500VDC CER 0+-3( 52763 0160-4148 CAP-FXD 0.033uF 6 kV POLYE-MET...
  • Page 69 HP Part Number 85662-60059 Reference HP Part C Mfr Part Description Designation Number D w Code Number RESISTOR 100 +-5% .25W CC TC=-400/+500 0698-8768 01121 RESISTOR 390K 10% .5W CC TC=O+882 0687-3941 01121 EB3941 RESISTOR 10K +-5% .25W CC TC=-400/+700...
  • Page 70 HP Part Number 85662-60233 Mfr Part Reference HP Part Description Designation Number Code Number 85662-60233 HIGH VOLTAGE REGULATOR BOARD ASSEMBLY 28480 85662-60233 (SER : 3004~) 5062-7089 28480 5062-7089 HIGH VOLTAGE MODULE 0160-4148 CAP-FXD 0.033uF 6 kV POLYE-MET 04200 0160-0684 CAP-FXD 1OOOpF 4 kV POLYE-MET 04200 CAP-FXD D.D33uF 6 kV POLYE-MET...
  • Page 71 HP Part Number 85662-60233 Reference HP Part Mfr Part Description Designatior Number Code Number 3699-0171 RESISTOR 6.5M +-5% 1W TF TC=O+-250 01992 1699-1065 RESISTOR 10K +-5% .25W CC TC=-400/+700 01607 1686-1065 RESISTOR 10M 5% .5W CC TC=O+1059 01607 EB1065 RESISTOR 1M +-5% .25W CC TC=-600/+900...
  • Page 74 FRONT VIEW HIGH VOLTAGE...
  • Page 76 q F2...
  • Page 79 (Serial Number Prefixes: 2403A-3001A) input state (QlO, Q15) with current source Qll, two current gain stages (Q9, Q14 and QS, provides rear-panel X and Y DISPLAY OUTPUTS. Current Amplifier (B) The Current Amplifier transforms an input voltage change to a differential current change at the collectors of QlO and Q15.
  • Page 80 HP Part Number 85662-60057 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60057 X DEFLECTION AMPLIFIER BOARD ASSEMBLY 2848C 85662-60057 : 2403~-3001~) SERIAL PREFIXES 85662-60057 Y DEFLECTION AMPLIFIER BOARD ASSEMBLY 2848C 85662-60057 (SERIAL PREFIXES: 2403A-3001A) 0180-0374 CAPACITOR-FXD lOUF+-10% ZOVDC TA...
  • Page 81 HP Part Number 85662-60057 Reference HP Part Mfr Part Description Designatior Number Code Number 0757-0394 RESISTOR 51.1 +-1% .125W TF TC=O+-100 19701 0698-3150 RESISTOR 2.371: 1% .125W TF TC=O+-100 19701 0698-3150 RESISTOR 2.37K 1% .125W TF TC=O+-100 19701 0698-3155 RESISTOR 4.641: 1% .125W TF TC=O+-100...
  • Page 82 I F - D I S P L A Y S E C T I O N D I G I T A L STORAGE @CURRENT TO VOLTAGE A M P L I F I E R $ A M P L I F I E R TO VOLTAGE A M P L I F I E R ‘I...
  • Page 83 R 2 7 R 2 8 GA I N H F G A I N...
  • Page 85 (Serial Number Prefixes: 2403A-3001A) Warning Unregulated voltages as high as +150 V are present in the IF-Display Section whenever the power cord is connected to a power source. This condition is annunciated by LED indicator AlA8DSl. Remove the power cord when setting up service procedures.
  • Page 86 The regulator circuit can be shut down by turning on Q3, which shunts the source current to ground. -15 V Regulator (B) The -15 V Regulator is a tracking supply, holding the -15 V supply to the same magnitude (inverted polarity) as the +15 V supply, through divider resistors R19 and R20. Overvoltage and current limiting circuits are identical to those of the +15 V supply.
  • Page 87 (85662-60101) except that +15 V dc voltage regulated by VR2 was +lO V dc in the previous version. This voltage is always present whenever the 85662A is plugged in. It is used to power the thermal shutdown section 0 and HPON (High=Power On) circuit. The main +15 V is turned off when in thermal shutdown or when HPON is false.
  • Page 88 current in LlOO is continuous; therefore, the 30 kHz component is minimal in the load current presented to the +23 V unregulated supply. R126 is used to lower the Q of LlOO and Cl00 to less than one. This ensures that there will be no ringing at their resonant frequency. LlOO is a toroidal inductor to minimize radiated magnetic field.
  • Page 89 When the loop is closed, the wiper of R103 will be at about +8.4 V and is connected to the negative input of U105A. The positive input of U105A is tied, through R123, to the +8.4 V reference voltage generated by UlOO. U105A is an integrator below the frequency of the zero formed by R105 and Cl12 (112 Hz) and a gain of approximately three above that frequency.
  • Page 90 -15 V Regulator. Serial Number Prefixes 3001A and Above The AlA +lOO V, +5.2 V Regulator (HP Part Number 85662-60235) is actually a +120 V, from AlA Rectifier to provide regulated outputs of +120 V and +5.2 V.
  • Page 91 IF-Display Section Internal Fuse Replacement Warning Remove ac line cord from both instruments before proceeding with this procedure. 1. Remove feet Q) from rear of instrument by removing screws @ shown in view A of Figure 2. Remove top cover from IF-Display Section by loosening screw @ shown in view A. 3.
  • Page 92 V I E W A V I E W B Figure 1. IF-Display Section internal Fuse Replacement...

  • Page 93: Hlmp

    HP Part Number 85662-60101 Reference HP Part C Mfr Part Description Designation Number Code Number 85662-60101 +-15VDC REGULATOR BOARD ASSEMBLY 28480 85662-60101 : 2403~-3001~) SERIAL PREFIXES CAPACITOR-FXD .33UF+-10% 35VDC TA 56289 CAPACITOR-FXD 6.8UF+-10% 35VDC TA 56289 0160-2199 CAPACITOR-FXD 30PF +-5% 300VDC MICA -2O/...
  • Page 94 HP Part Number 85662-60101 Reference HP Part Mfr Part Description Designatior Number Code Number 3050-0105 78471 WASHER-FL MTLC ND. 4 .125-IN-ID 0340-1114 INSULATOR-XSTR THRM-CNDCT 55285 K-4-05 26365 INSULATOR-FLG-BSHG NYLON 974 307 STANDOFF-RVT-ON .l-IN-LG 4-40-THD 14480 TRANSISTOR PNP 2N2907A SI TO-18 PD=400MU...
  • Page 95 HP Part Number 85662-60101 Reference HP Part Mfr Part Description DesignationI Number Number 0757-0465 RESISTOR 1OOK +-1% .125Y TF TC=O+-100 0683-2265 RESISTOR 22M 5% .25U CC TC=-900/+1200 CB2265 0698-3459 RESISTOR 3831: 1% .125W TF TC=O+-100 0757-0403 RESISTOR 121 +-1% .125Y TF TC=O+-100 0698-3446 RESISTOR 383 1% .125W TF TC=O+-100...
  • Page 96 HP Part Number 85662-60232 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 85662-60232 HIGH VOLTAGE POWER SUPPLY BOARD ASSEMBLY 28480 85662-60232 : 3014~) RIAL PRE 0180-2205 CAP-FXD 0.33uF 35 V TA 04200 0180-0116 CAP-FXD 6.8uF 35 V TA...
  • Page 97 HP Part Number 85662-60232 Reference HP Part Description Number Code Number 1901-1065 DIODE-PM RECT lN4936 400V 1A 200NS 1990-0487 LED-LAMP LUM-INT=PMCD BVR=5V 01541 HLMP-1401 1990-0487 LED-LAMP LUM-INT=2MCD BVR=5V HLMP-1401 2110-0681 FUSE 2.5A 250V NT0 FE IEC 0470: 21202.5 2110-0702 FUSE 2A 250V NTD FE IEC...
  • Page 98 HP Part Number 85662-60232 Reference HP Part Mfr Part Description Designation Number Code Number 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100 00746 CRB14 OR CRB25 0757-0424 RESISTOR l.lK +-1% .125W TF TC=O+-100 00746 CRB14 OR CRB25 0683-0275 RESISTOR 2.7 5% .25W CF TC=O-400...
  • Page 99 HP Part Number 85662.60232 Reference HP Part Mfr Part Description Designatior Number Code Number 0757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 0074t CRB14 OR CRB25 0698-3601 RESISTOR 10 5% 2W MO TC=O+-200 02491 GS-3 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100...
  • Page 100 HP Part Number 85662060250 Reference HP Part Mfr Part Description Designation Number Code Number HIGH VOLTAGE POWER SUPPLY BOARD ASSEMBLY 28480 85662-60250 : 3026~) SERIA PREFIX 0180-2205 CAP-FXD 0.33uF 35 V TA 04200 0180-0116 CAP-FXD 6.8uF 35 V TA 04200...
  • Page 101 HP Part Number 85662-60250 Mfr Part Reference HP Part Description Designation Number Code Number 1901-1065 DIODE-PWR RECT lN4936 40DV 1A 200NS 02037 1990-0487 LED-LAMP LUM-INT=2MCD BVR=5V 01542 HLMP-1401 1990-0487 LED-LAMP LUM-INT=2MCD BVR=5V 01542 HLMP-1401 04703 FUSE 2.5A 250V NT0 FE IEC 21202.5...
  • Page 102 HP Part Number 85662-60250 Reference HP Part C Mfr Part Description D Qty Designation Number Code Number 0757-0280 CRB14 OR CRB25 RESISTOR 1K +-1% .125W TF TC=O+-100 00746 0757-0424 CRB14 OR CRB25 RESISTOR l.lK +-1% .125W TF TC=O+-100 00746 0683-0275 R-25J RESISTOR 2.7 5% .25W CF TC=O-400...
  • Page 103 HP Part Number 85662-60250 Reference HP Part Mfr Part Description Designation Number Code Number 3757-0442 RESISTOR 10K +-1X .125W TF TC=O+-100 CRB14 OR CRB25 00746 3698-3601 RESISTOR 10 5% 2W MO TC=O+-200 GS-3 02499 RESISTOR 1K +-1X .125W TF TC=O+-100...
  • Page 104 HP Part Number 85662-60052 Al A7 + 1 OOV, + 5.2V Regulator Reference HP Part Mfr Part Description Designation Number Code Number 85662-60052 28480 85662-60052 (SERIAL PREFIXES: 2403A-3001A) CAPACITOR-FXD 2.2UF+-10% 20VDC TA 0180-0197 56289 0160-3670 CAPACITOR-FXD .lUF +-20% POOVDC CER...
  • Page 105 HP Part Number 85662-60052 Reference HP Part Description Designation Number Code Number 0757-0466 RESISTOR 1lOK +-1% .125U TF TC=O+-100 19701 0757-0442 RESISTOR 10K +-I% .125W TF TC=O+-100 19701 0757-0442 RESISTOR 10K +-1% .125U TF TC=O+-100 19701 0757-0442 RESISTOR IOK +-I% .125U TF TC=O+-100...
  • Page 106 HP Part Number 85662-60235 HP Part C Reference Mfr Part Description Designation Number D Qty Code Number 85662-60235 28480 85662-60235 : 3004~) IAL PREFIX 0180-0197 CAP-FXD 2.2uF 20 V TA 04200 0160-3670 CAP-FXD O.luF 200 V 02010 0160-2199 CAP-FXD 3OpF 300 V MICA...
  • Page 107 HP Part Number 85662-60235 Al A7 + 1 OOV, + 5.2V Regulator Reference HP Part Mfr Part Description Designatior Number Code Number RESISTOR 10K +-I% .125W TF TC=O+-100 00741 0757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 0757-0442 00741 RESISTOR 10K +-1% .125W TF TC=O+-100...
  • Page 110 H V A D J...
  • Page 116 IF-Display Section in the absence of a signal from the RF Section when power is required for troubleshooting. The LINE TRIGGER voltage is selected as required by A3Al Trigger. The AlA Rectifier board assembly has three versions; HP Part Numbers 85662-60133, 85662-60204, and 85662-60234. Each version changed this circuit. 85662-60133 (Serial Number Prefixes: 2403A-2813A) Bridge rectifier, Ul, provides an unregulated +118 V to AlA +lOO V, +5.2 V Regulator.
  • Page 117 Warning The time constant of the filter capacitor is about 25 seconds. Before servicing, allow adequate time for discharge after line power cable is removed. The +23 V unregulated supply, bridge rectifier CR9 through CR12, includes an overvoltage protection circuit. If line power from a 220 V/240 V source is applied when the Line Voltage Selector is set to 100 V/120 V, the overvoltage causes CR6 to conduct, turning on CR5 to blow the fuse in the Line Module.
  • Page 118 HP Part Number 85662-60133 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60133 BOARD ASSEMBLY, RECTIFIER 85662-60133 : 2403~-2813~) SERIAL PREFIXES 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4298 CAPACITOR-FXD 4700PF +-20% 250VDC CER 815-250V X5R 472M 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1ODVDC CER...
  • Page 119 HP Part Number 85662-60204 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60204 RECTIFIER BOARD ASSEMBLY 85662-60204 : 2816~-3001~) SERIAL PREFIXES 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04224 0160-4298 CAPACITOR-FXD 4700PF +-20% 25OVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 120 HP Part Number 85662.60234 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60234 RECTIFIER BOARD ASSEMBLY 85662-60234 (SERI : 3004~) PREFIX 0160-4832 CAP-FXD O.OluF 100 V 0160-4298 CAP-FXD 47OOpF 250 V 06352 0160-4832 CAP-FXD O.OluF 100 V 0160-0168 CAP-FXD O.luF 200 V POLYE-FL...
  • Page 121 HP Part Number 85662-60056 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 85662-60056 BUS TRANSITION BOARD ASSEMBLY 85662-60056 28480 1901-0033 DIODE-GEN PRP 180V 200MA DO-35 1901-0033 DIODE-GEN PRP 180V 200MA DO-35 1251-5269 CONN-POST TYPE .lOO-PIN-SPCG...
  • Page 123 M A I N S I N D I C A T O R...
  • Page 124 M A I N S I N D I C A T O R CATHODE 4-1...
  • Page 125 C R 9...
  • Page 130 HP Part Number 85662-60050 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 28480 85662-60050 DISPLAY MOTHERBOARD ASSEMBLY 85662-60050 26742 1251-2035 CONNECTOR-PC EDGE 15-CONT/ROW 2-ROWS 220-624-03 1251-2034 CONNECTOR-PC EDGE lo-CONT/ROW L-ROWS 1251-2035 CONNECTOR-PC EDGE 15-CONT/ROW P-ROWS...
  • Page 132 I J5 , ‘ C O V E R S I D E H . V . ‘ H . V . H O U S I N G...
  • Page 134 A3 Digital Storage, Circuit Description A3 Digital Storage consists of three sections: Input Section section receives the video and sweep signals, converts them to digital, and transfers the data to the Processor Section. Processor Section and control for the data storage. The digital storage algorithm is contained in read-only memory (ROM) in A3A6 Main Control.
  • Page 135 pattern can be generated independently of the main processor in the RF Section (Al5 Controller). To enable the test pattern: a. Jumper A3A6TP3 and A3A6TP6. (Turns on the test ROMs.) b. Push A3A7Sl to initialize. If troubleshooting without the RF Section or with the Analyzer Bus Interconnect cable W31 disconnected, AlA8TPl and AlA8TP2 must be jumpered to turn on the power supplies.
  • Page 136 1. IF INSTR CHECK LED I remains on and no test pattern can be obtained, the following assemblies should be checked in the order shown. Al5 Controller 2. If INSTR CHECK LED I remains on but the test pattern is correct, check the following assemblies in the order shown.
  • Page 137 disables interrupt and return inputs to the State Machine Controller. The BS (Block Switch) line is forced to toggle at a 4 MHz rate. The program addresses decrements in a binary sequence through all possible addresses with the BS line toggling at 4 MHz, SO at 2 MHz, Sl at 1 MHz, and so on. This checks the A3A6 Main Control assembly, its ROM, Pipeline Registers, flip-flops and control pulses outputs, and the A3A7 I/O Port Decoder.
  • Page 138 words on A3A5. A pattern is also output to the X and Y line generator registers on A3A3. The program does not read any input ports; Multiplexer Bus Drivers on A3A5 are the only talkers on the Digital Storage data bus. Test Program 4 test qualifier bit This is the overall check program used to test all the Digital Storage input ports.
  • Page 139 T E S T P R O G R A M 3 T E S T P R O G R A M 4 T E S T P R O G R A M 5 A N D 6 Figure 2.
  • Page 140 A3 Digital Storage Mnemonic Table Mnemonic Mnemonic Description 18.4 MHz Local Oscillator Fast Sweep Z Axis Signal HLDX Hold X Position (Sample and 1 MHz ADC Clock Hold Control) 21.4 MHz IF Signal HLDY Hold Y Position (Sample and Hold Control) 3MHZ 3 MHz IF Signal HOLD...
  • Page 141 A3 Digital Storage Mnemonic Table (continued) Mnemonic Description Mnemonic Description LLGBLANK LOW=Line Generator Ram Bus Bits 0 through 11 Blanking Control RBWA Resolution Bandwidth Control RBWB LMEMEN LOW=Enable Memory Output RBWC Log/Linear Control LOG/LIN RBWD REC CAL Recorder Calibrate LROMEN LOW=ROM Enable REC ZERO Recorder Zero...
  • Page 143 the A3 Digital Storage section and in the spectrum analyzer RF section. Instrument Bus commands set the HSWP line high or low, or program HSWP to go high when a sweep trigger occurs. Trigger sources that may be selected are: the line, the video signal, or an external trigger input from the instrument rear panel.
  • Page 144 to go low and HSWP to go high. (Note that HSWP is set high approximately 500 ps after occurrence of the Instrument Bus SET command. This time delay allows Al5 Controller to perform certain functions before the sweep starts.) To clear HSWP, Instrument Bus 13 is set high, Address 50 is selected, and (when the IF-Display Section address strobe occurs) U12A, U12B, U4A, and U4B are cleared.
  • Page 145 Video Trigger Video Trigger comparator U13 generates a negative-going transition when the VIDEO signal rises above the voltage at U13 pin 2, which depends on the position of the front-panel TRIGGER LEVEL control. R49, R50, and R51 divide the TRIG LEVEL voltage (0 V to connected to the strobe inputs (pins 5 and 6) of U13, disables the output of U13 in Fast Sweep mode when the fast sweep ramp is being generated.
  • Page 146 Fast Sweep Time Control @ Data on Instrument Bus lines 11 through 14 specify the fast sweep generator sweep time. This data is latched into hex D flip-flop U6 when Address 51 is strobed. (Refer to the table, Note 6 on the schematic, for coding of the sweep time control lines.) Data on Instrument Bus line 15 is latched into U6 with the four sweep time bits (IOBll-IOB14) and enables fast sweep generator operation.
  • Page 147 Fast Sweep Control (6~ The Fast Sweep Control contains circuitry for end of sweep detection and controls fast sweep dead time, and fast sweep triggering. End of Sweep Detection When the sweep ramp reaches about +2.2 V, Q5 conducts and turns Q4 on. When the collector of Q4 goes low, UlB pin 5 produces a pulse whose length is the dead time.
  • Page 148 Fast Sweep Intensity Control @ To provide uniform intensity between the fast sweep trace and the other information displayed on the CRT, the Fast Sweep Intensity Control circuit generates a voltage to control the CRT beam intensity (Z-axis) when the fast sweep ramp is multiplexed in. The FSZ voltage is dependent on the duty cycle of the fast sweep ramp;...
  • Page 149 - +4.2V OVERSWEEP ’ ‘ D E A D T I M E I L L A Figure 1. Fast Sweep Time Waveforms When using (LINE) TRIGGER, the waveforms are similar except for the dead time. Following the minimum dead time period, whenever a negative-going transition occurs at TP3, a ramp is started.
  • Page 150 S W E E P + OVER SWEEP 1 0 ms 7 ms F R E Q U E N C Y S P A N : 0 H z S W E E P T I M E : 2 ms Figure 2.
  • Page 151 waveform to the VIDEO TRIGGER and CRT Y-Axis Deflection circuits, allowing several of the fast sweep times (10 psec to 200 psec) to be checked. Key in INSTR PRESET or 0 Hz, (-TIME) 10 psec, @iZ5) TRIGGER and adjust the FREQUENCY SPAN TRIGGER LEVEL control to display a two-cycle waveform;...
  • Page 152 C E N T E R SPAN I MHZ Figure 3. Fast Sweep Time Test Waveform...
  • Page 153 HP Part Number 85662-60014 HP Part Reference Mfr Part Description Designation Number Code Number 85662-60014 TRIGGER BOARD ASSEMBLY 28480 85662-60014 : 2403~-3001~) PREFIXES 0160-0174 CAPACITOR-FXD .47UF +80-20% SOVOC CER 04222 CAPACITOR-FXD .47UF +80-20% 50VDC CER 04222 CAP-FXD 6.2pF 500 V...
  • Page 154 HP Part Number 85662-60014 Reference HP Part Description Designatior Number Code Number 1853-0451 TRANSISTOR PNP 213799 SI TO-18 PD=360MW 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1854-0039 TRANSISTOR NPN 2N3053S SI TO-39 PD=lW 0471: 0698-6863 RESISTOR 1.5371: +-O-25% .125W TF TC=D+-5...
  • Page 155 HP Part Number 85662-60014 HP Part Mfr Part Reference Description Designation Number Code Number 0757-0289 RESISTOR 13.3K +-1% .125W TF TC=O+-100 19701 0683-1555 RESISTOR 1.5M 5% .25W CF TC=O-900 R-25J 0757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 19701 0698-3260 RESISTOR 464K 1% .125W TF TC=O+-100...
  • Page 156 HP Part Number 85662-60014 HP Part Mfr Part Reference Description Designatior Number Code Number DIODE-ZNR 5.11V 5% DO-35 PD=.4W 04713 *Indicates factory-seZected value 85662-60014 Parts List...
  • Page 157 HP Part Number 85662-60244 Reference HP Part Description Designation Number 85662-60244 TRIGGER BOARD ASSEMBLY : 3004~) SERIAL PREFIX 0160-0174 CAPACITOR-FXD .47UF +80-20% 50VDC CER 04222 0160-0174 CAPACITOR-FXD .47UF +80-20% SOVDC CER 04222 0160-2252 CAP-FXD 6.2pF 500 V 52763 0140-0233 CAPACITOR-FXD 480PF +-1% BOOVDC MICA D+7...
  • Page 158 HP Part Number 85662-60244 Reference Description Designation Number Code Number 1853-0451 TRANSISTOR PNP 2N3799 SI TO-18 PD=360MW 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PD=36OMW 0471: 1854-0039 TRANSISTOR NPN 2N3053S SI TO-39 PD=lW 0471: 0698-6863 RESISTOR 1.537K +-0.25% .125W TF TC=D+-5...
  • Page 159 HP Part Number 85662-60244 Reference HP Part Mfr Part Description Designatior Number Code Number 0757-0289 RESISTOR 13.3K +-1% .125W TF TC=O+-100 19701 0683-1555 RESISTOR 1.5M 5% .25W CF TC=O-900 R-25J 0757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 19701 0698-3260 RESISTOR 464K 1% .125W TF TC=O+-100 19701 RESISTOR 3.16K +-1% .125W TF TC=O+-100...
  • Page 160 HP Part Number 85662-60244 Reference HP Part Mfr Part Description Designatior Number Code Number 1902-0041 DIODE-ZNR 5.11V 5% DO-35 PD=.4W 0471: *Indicates facto y-selected value Page 4 of 4...
  • Page 162 R 7 2 F S Z L R T R C T R I G O F F S E T...
  • Page 164 It receives AX and AY signals from A3A3 Line Generator, approximates the line length, and controls the Z-axis level to the display. It sets and controls the duration of the Line Generator drawing period, which is either 4 pus or 19 ps, depending on the approximate line length. It controls all display blanking.
  • Page 165 Line Generator Z-Axis @ AX and AY are received from A3A3 Line Generator. U17 and associated circuitry is a magnitude detector. For positive AX, CR1 is forward biased, U17 output goes negative, and CR2 cathode is at 0 V. For negative AX, CR1 is reverse biased, U17 output goes positive, and CR2 cathode is -AX volts (or/AXl).
  • Page 166 Blink @ The output of U12 is a 1 Hz signal with a 90 percent duty cycle. When enabled by the BLINK command stored in the Input Register, this signal causes display blinking. Long Line/Short Line Timing @ This circuit receives signal LGCLK from A3A7 Interface and signal LL from the Input Register.
  • Page 167 Fast Scan Trigger Detect @I This circuit is used to detect the occurrence of a fast scan trigger. When LRTRC, the retrace signal, goes high, a fast scan has been triggered. Flip-flop U18B is set by the positive edge of LRTRC.
  • Page 168 Key in the following: Instrument Preset Comments WRITE: 1056Hz ............
  • Page 169 O s c i l l o s c o p e s e t t i n g s : V e r t i c a l : 5V/div S w e e p T i m e : lOus/div A n a l y z e r S e t t i n g s : P l - 3 6...
  • Page 170 HP Part Number 85662.60025 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60025 BOARD ASSEMBLY, INTENSITY CONTROL 85662-60025 (SERIA : 2403~-3001~) L PREFIXES 0160-2249 CAPACITOR-FXD 4.7PF +-.25PF SOOVDC CER 5276: 0160-2264 0160-3067 CAPACITOR-FXD 200PF +-5% 300VDC MICA 0+7...
  • Page 171 HP Part Number 85662-60025 Reference HP Part Mfr Part Description Designation Number Number I1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 71461 DIODE-SWITCHING 30V 50MA 2NS DO-35 1 .901-0518 DIODE-SCHOTTKY SM SIG 5082-2800 DIODE-SCHOTTKY SM SIG 5082-2800 DIODE-SWITCHING 30V 50MA 2NS DO-35...
  • Page 172 HP Part Number 85662-60025 Reference HP Part C Mfr Part Description Designation Number D w Code Number 0757-0447 RESISTOR 16.2K +-1% .125W TF TC=O+-100 19701 0757-0443 RESISTOR 11K +-1% .125W TF TC=O+-100 19701 0757-0421 RESISTOR 825 +-1% .125W TF TC=O+-100...
  • Page 173 HP Part Number 85662.60025 Reference HP Part Mfr Part Description Designatior Number Code Number 1360-0535 TERMINAL-TEST POINT .330IN ABOVE 1360-0535 TERMINAL-TEST POINT .330IN ABOVE 1360-0535 TERMINAL-TEST POINT .330IN ABOVE TERMINAL-TEST POINT .330IN ABOVE TERMINAL-TEST POINT .330IN ABOVE TERMINAL-TEST POINT .330IN ABOVE TERMINAL-TEST POINT .330IN ABOVE...
  • Page 174 HP Part Number 85662-60245 Reference Mfr Part Description Designation Number D Code Number 85662-60245 BOARD ASSEMBLY, INTENSITY CONTROL 28480 85662-60245 : 3004~) SERIAL PREFIX 0160-2249 CAPACITOR-FXO 4.7PF +-.25PF SOOVOC CER 52763 0160-2264 CAPACITOR-FXO 20PF +-5% 500VOC CER 0+-30 52763 0160-3067...
  • Page 175 HP Part Number 85662-60245 Reference HP Part Mfr Part Description Designatior Number Code Number 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 7146E 1901-0518 DIODE-SCHOTTKY SM SIG 5082-2800 1901-0518 DIODE-SCHOTTKY SM SIG 5082-2800 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35...
  • Page 176 Reference HP Part Mfr Part Description Code Designation Number Number 0698-3158 RESISTOR 23.7K +-1% .125W TF TC=O+-100 19701 0757-0443 RESISTOR 11K +-1% .125W TF TC=O+-100 19701 0757-0421 RESISTOR 825 +-1% .125W TF TC=O+-100 19701 0698-3157 RESISTOR 19.6K 1% .125W TF TC=O+-100...
  • Page 177 HP Part Number 85662-60245 Reference HP Part Mfr Part Description Code Number Number 3360-0535 TERMINAL-TEST POINT .330IN ABOVE TERMINAL-TEST POINT .330IN ABOVE 3360-0535 TERMINAL-TEST POINT .330IN ABOVE 3360-0535 TERMINAL-TEST POINT .330IN ABOVE 3360-0535 TERMINAL-TEST POINT .330IN ABOVE 1360-0535 TERMINAL-TEST POINT .330IN ABOVE 1360-0535 TERMINAL-TEST POINT .330IN ABOVE...
  • Page 182 to analog values, and connects them with straight lines. This process, called line generation, is similar to that of dot-to-dot drawing on paper. (See Figure 1.) Two independent line generators are required: one for the X series of values and one for the Y series. For each line there is a setup period following by a drawing period.
  • Page 183 and AY at a constant rate such that the output becomes X + AX and Y + AY; that is, “new X Register @ U5 and U6 form a lo-bit X Position Register. When a new X position is present on lines LDX causes U5 and U6 to be loaded with the value of BO-B9.
  • Page 184 SAMPLE MODE HOLD MODE Figure 2. Sample and Hold Modes, Simplified Schematic X Integrator @ During the setup period, Q5 is open, leaving only Ul and C26 holding the present value of X. During the drawing period, Q5 is closed and the constant AX value from the Sample and Hold circuit causes a constant current (proportional to AX) to flow through C26.
  • Page 185 X Filter @ The X Filter is a 2.5 MHz low-pass filter which smooths out transients from the X Integrator. Y Register @ Digital Storage Bus, the CHAR line is held low and positive-going edge on LDY causes U9 and UlO to be loaded with the value of BO-B9. These 10 bits then become the Y position input to the Y DAC.
  • Page 186 Long Line Switch Driver @I The long Line Switch Driver provides level translation from the TTL signal LLL to the gate signals for Q7 and QS. A high on LLL turns on Q7 and QS. Line Generator liming Figure 3 shows the timing relationship between the X and Y Line Generator outputs and the drive signals.
  • Page 187 The A3A3 Line Generator Assembly converts the digital X and Y display positions from the Digital Storage processor to analog values and draws lines between them. It positions the characters with respect to the graticule and sets the size of the display and graticule. A distorted CRT display involving both the horizontal and the vertical components is often caused by malfunctions on this assembly.
  • Page 188 Figure 4. Digital Storage Test Program 5 Display with Defective Y Channel The Expand Register @ and Reference @ set the VREF levels for the X and Y DACs. This provides both magnification and origin shift for the display. As shown in Table 1, four voltage levels are generated.
  • Page 189 Figure 5. Reference Voltages The following program is useful in troubleshooting problems related to the dynamic operation of the Summing Amplifiers, Sample and Hold, and Integrators. It draws a line from the lower left corner of the display to the upper right corner and then back to the lower left. Key in the following: Instrument Preset Comments...
  • Page 190 The waveforms in Figure 6 show the X and Y channel outputs for this program. The +5 V pulse at A3A3TP12 is the “next X” data from the X DAC. In this program the “X shift” value from the Expand Register is 0 V. The “present X” value is the waveform of small spikes every 5 j~s indicate the beginning and end of the 1 /.LS sampling period.
  • Page 191 HP Part Reference Mfr Part Description Designatior Number Code Number 85662-60128 BOARD ASSEMBLY, LINE GENERATOR 85662-60128 0180-0374 CAPACITOR-FXD lOUF+-10% 20VDC TA 56285 0180-0374 CAPACITOR-FXD lOUF+-10% ZOVDC TA 56285 0180-0374 CAPACITOR-FXD lOUF+-10% ZOVDC TA 56285 0160-2257 CAPACITOR-FXD 1OPF +-5% 500VDC CER 0+-6(...
  • Page 192 HP Part Number 85662-60128 Reference HP Part Mfr Part Description Designation Number Code Number 0160-2264 CAPACITOR-FXO 2OPF +-5% 500VOC CER 0+-31 5276: 0160-2264 CAPACITOR-FXO 2OPF +-5% SOOVOC CER 0+-3C 5276: 0160-4084 CAP-FXD O.luF 50 V 0160-4084 CAP-FXD O.luF 50 V...

  • Page 193: Resistor 38.3K 1% .125W Tf Tc=O

    HP Part Number 85662-60128 Reference HP Part C Mfr Part Description Designation Number D Gty Code Number TRANSISTOR J-FET N-CHAN D-MODE TO-18 ST 1855-0020 04713 SFE793 1853-0034 TRANSISTOR PNP SI TO-18 PD=360MW 04713 TRANSISTOR MOSFET N-CHAN E-MODE TO-72 SI 1855-0241...
  • Page 194 HP Part Number 85662-60128 Reference HP Part C Mfr Part Description Designation Number D GtY Code Number 0698-0084 RESISTOR 2.15K 1% .125W TF TC=O+-100 19701 0698-3157 RESISTOR 19.6K 1% .125W TF TC=O+-100 19701 0698-3157 RESISTOR 19.6K 1% .125W TF TC=O+-100...
  • Page 197 I F - D I S P L A Y S E C T I O N 8 5 6 6 2 - 6 0 1 2 8 ( 1 O F 2 ) : 2403~) S E R I A L P R E F I X DGND...
  • Page 199 Memory Assembly A3A4 contains 4096 12-bit words of static random-access memory (RAM) and 2048 8-bit words of read-only memory (ROM), plus the necessary latches, buffers, and control logic for input and output operations. Data for display annotation (center frequency, reference level, and so on.), graticules, characters, and TRACE A and TRACE B is stored in memory.
  • Page 200 Control Logic @j Control Logic generates control signals for display memory and buffers in Memory Data Input Register. When control line CE (chip enable) is true, RAM address 11 @All) from U7 generates low chip enable 1 and 2 (LCEl, LCE2). Thi s enables the lower or upper block of display memory during read and write operations.
  • Page 201 Test Program 4 is used to write and read various patterns from the Display Memory @ and to read the Character Stroke Memory 0. An explanation of Test Program 4 is located in the “A3 Digital Storage Troubleshooting” tab. This test requires that the Digital Storage input bus be good (there are no shorted Digital Storage data lines).
  • Page 202 Reference HP Part Mfr Part Description Designatior Number Code Number MEMORY BOARD ASSEMBLY 2848C 85662-60125 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-10x 50VDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER...
  • Page 204 u 1 7 U 1 6...
  • Page 206 read-only memory (ROM) registers, an accumulator, and an arithmetic logic unit (ALU). This assembly provides all data functions and transfers for digital storage. Register RAM @ manipulation. Constant ROM @ manipulation. Accumulator @I U7 and U9 form the 12-bit Accumulator, which receives and holds all results of ALU operations.
  • Page 207 Control Decoder @ Multiplexer/Bus Driver @ U6, U8, and UlO form a 12-bit Bus Driver with two data inputs. Data from the RAM Bus or from the Accumulator Bus may be transferred to the main Digital Storage Bus through these drivers.
  • Page 208 HP Part Reference Mfr Part Description Code Designatior Number Number 85662-60145 BOARD ASSEMBLY, DATA MANIPULATOR 85662-60145 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER...
  • Page 209 Reference HP Part Mfr Part Description Designation Number Code Number 0698-3155 RESISTOR 4.64K 1% .125W TF TC=O+-100 19701 0698-3132 RESISTOR 261 1% .125W TF TC=O+-100 19701 0698-3132 RESISTOR 261 1% .125W TF TC=O+-100 19701 0698-3155 RESISTOR 4.641: 1% .125W TF TC=O+-100...
  • Page 211 A C C O N L Y p LOAD...
  • Page 213 The Digital Storage Processor is controlled by an algorithmic state machine, which uses relative-state addressing and interrupt linkage in performing the control algorithm. The Digital Storage Processor includes A3A4 Memory, A3A5 Data Manipulator, A3A6 Main Control, and A3A7 Interface. State Register @J The State Register, U13 and U14, contains the present state of the algorithm.
  • Page 214 Pipeline Registers @ @ The Pipeline Registers, U24 and U28, hold instructions from the Program ROM for 125 ns during execution. Addressable Flip-Flops @ U21 and U23 contain 16 flip-flops that may be individually set and cleared. These flip-flops control signals for the Input Section and CRT Driver Section of A3 Digital Storage. The Input Section includes A3A8 Analog-Digital Converter and A3A9 Track and Hold.
  • Page 215 The INTR and LQ inputs, such as U16 pin 10, are checked simply for activity. The Free Run check is done with A3A6TP8 grounded. This forces U27 pin 11 high and U18 pin 6 low. To verify these components and the Ul adder input, this ground is removed. The Free Run check setup is used to verify the System ROM.
  • Page 216 Verify binary count sequence, starting at the least significant bit SO (500 ns square wave) to S7 (64 ps square wave). 4 A3A6...
  • Page 217 HP Part Number 85662-60146 Reference HP Part Description Designatior Number Code Number BOARD ASSEMBLY, MAIN CONTROL 85662-60146 CAPACITOR-FXO .lUF +-lo% 50VDC CER CAPACITOR-FXD .lUF +-10% SDVDC CER 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER CAPACITOR-FXD .lUF +-10X 5DVOC CER 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER 0160-4835 CAPACITOR-FXD .lUF +-10X SOVDC CER...
  • Page 218 HP Part Number 85662-60146 Reference HP Part Mfr Part Description Designation Number Code Number 0360-0535 TERMINAL-TEST POINT .330IN ABOVE 0360-0535 TERMINAL-TEST POINT .330IN ABOVE 46819 0360-0535 TERMINAL-TEST POINT .330IN ABOVE 46819 0360-0535 TERMINAL-TEST POINT .330IN ABOVE 46819 0360-0535 TERMINAL-TEST POINT .330IN ABOVE...
  • Page 222 assembly also includes qualifier selection for conditionaI branching, input/output (I/O) port decoding, and the main clock circuits. Data Transfer Register @ U2, U7, U8, and U9 form a 16-bit Data Transfer Register which can be loaded or output onto either the Instrument Bus (through U16 and U17, the Instrument Bus Drivers) or the Digital Storage Bus (through U3, U4, and U5, the Digital Storage Bus Drivers).
  • Page 223 The A3A7 Interface assembly contains several different circuits. Testing the Timing Generator and Turn-on Control is probably best done with an oscilloscope to monitor the 8 MHz, 1 MHz, and 200 kHz outputs. The Qualifier Select circuit is checked, along with the A3A5 Data Manipulator assembly, using Test Program 2.
  • Page 224 HP Part Number 85662-60127 Reference HP Part C Mfr Part Description Designation Number D w Code Number 85662-60127 INTERFACE BOARD ASSEMBLY 28480 85662-60127 CAPACITOR-FXD .lUF +-lo% 50VDC CER 04222 0160-4835 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 CAPACITOR-FXD .lUF +-lo% 50VDC CER...
  • Page 225 HP Part Number 85662.60127 Interface Reference HP Part Mfr Part Description Designatior Number Code Number 0360-0535 TERMINAL-TEST POINT .330IN ABOVE 46819 0360-0535 TERMINAL-TEST POINT .330IN ABOVE 46819 1810-0206 NETWORK-RES 8-SIP lO.OK OHM X 7 11236 750-81 1820-1444 IC MUXR/OATA-SEL TTL LS Z-TO-l-LINE QUAC...
  • Page 227 u 1 3 "17 "4...
  • Page 229 Hold into storable digital data for A3 Digital Storage. The important data and control lines are: all Digital Storage Bus bits, BO-Bll, which are used for data inputs and outputs, ADC, which loads final ADC data onto the Digital Storage Bus; HOLD, which resets the ADC and initiates a conversion;...
  • Page 230 begin a conversion, the ADC is first reset to ones by a low HOLD. When HOLD goes high, each bit is individually tried in a “trial” conversion, starting with the most significant bit. A decision is made to retain or drop the bit based on the comparator output. Once the decision has been made for each of the 10 bits, a “conversion-complete”...
  • Page 231 S P A N inn LHZ Center Frequency Readout will be 20.000 000 MHz for an Note HP 8568B/HP 8567A Figure 3. Ramp Converter Bit Failure By looking at noise with a 3 s sweep time (push Instrument Preset first), it is possible to determine which of the data bits are stuck by counting the discrete states displayed.
  • Page 232 S T O P 2 . 5 0 GHZ Stop Frequency Readout will be 1.50 GHz for HP 8568B/HP 8567A. Note Figure 4. Ramp Converter MSB Failure C E N T E R iB8.0 M H Z S P A N 2 0 . 0 HIi2 Center Frequency Readout will be 20.000 000 MHz for an...
  • Page 233 C E N T E R 18B.O MliZ Center Frequency Readout will be 20.000 000 MHz for an Note HP 8568B/HP 8567A. Figure 6. Video ADC Bit 2 Failure If the RAMP, HOLD or BUSY lines become stuck, the display will show a sweep related problem.
  • Page 234 Test Circuit The test circuit on A3A8 is designed to aid in troubleshooting lower-order bit failures and linearity problems in both the Ramp Converter circuit and the ADC circuit. The test circuit is normally transparent to A3A8 operation, and is activated by grounding A3A8TP8 NOISE TEST or A3A8TPlO RAMP TEST to A3A8TP9 to switch multiplexers U16, U17, and U18.
  • Page 235 R E F S T O P 2 . 5 0 GHZ “ S W 3 MHZ Stop Frequency Readout will be 1.50 GHz for HP 8568B/HP 8567A. Note Figure 7. A3A8 DAC Linearity...
  • Page 236 HP Part Number 85662160130 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60130 BOARD ASSEMBLY, ANALOG-DIGITAL CONVERTER 28480 85662-60130 0160-4814 CAPACITOR-FXD 15OPF +-5% 1OOVDC CER 0+-3 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER...
  • Page 237 HP Part Number 85662-60130 Reference HP Part Mfr Part Description Designation Number Code Number RESISTOR 1K +-1% .125W TF TC=O+-100 19701 RESISTOR-TRMR 500 10% TKF SIDE-AOJ 17-TF 7313E RESISTOR-TRMR 50K 10% TKF SIDE-ADJ 17-TF 7313E RESISTOR 20K +-0.1% ,125W TF TC=O+-25...
  • Page 238 HP Part Number 85662-60130 Reference HP Part C Mfr Part Description Designation Number D w Number Code 1820-1438 IC MUXR/DATA-SEL TTL LS 2-TO-l-LINE QUAD 01295 IC MUXR/DATA-SEL TTL LS P-TO-l-LINE QUAD 1820-1438 01295 DIOOE-ZNR 6.2V 2% DO-7 PD=.4W TC=+.002% 1902-0686...
  • Page 239 I F - D I S P L A Y S E C T I O N SWEEP SWEEP S E C T I O N D I G I T A L T R A C K S T O R A G E A N D M O T H E R E D H O L D...
  • Page 240 ‘ O F F S...
  • Page 242 true representation of noise are displayed on the CRT. This is accomplished by positive and negative peak detection. Positive Peak Detector @ The Positive Peak Detector acquires the most positive voltage to appear at its input and holds that voltage on holding capacitor C26 until the circuit is reset by a reset pulse from the decoding and timing circuits.
  • Page 243 output with 0 V input. U5 compares the input and output of the Peak Detector. A TTL high level is produced when the output is greater than the input. (R40, R41, and R16 provide a small amount of hysteresis for noise immunity.) Negative Peak Detector @ The Negative Peak Detector acquires the most negative voltage to appear at its input and holds that voltage on holding capacitor C38 until reset by a pulse from the decoding and...
  • Page 244 Track and Hold @ The Track and Hold circuit samples the signal appearing at the output of multiplexer Ul and holds the voltage on capacitor (215. The output of the Track and Hold circuit is used in A3A8 Analog-Digital Converter, where it is converted into Y-axis graph data. A simplified schematic of the Track and Hold circuit is shown in Figure 3.
  • Page 245 Display problems which involve only the video are often caused by malfunctions on either and the Digital Storage Test Patterns can be used to isolate the failure. Figure 4 shows the Digital Storage Test Pattern. Refer to “A3 Digital Storage Troubleshooting”...
  • Page 246 Proper operation of the detectors can be tested with the following sequence. TRACE B CLEAR WRITE Instrument Preset [VIEW) TRACE B [SHIFT) TRACE A m ......Negative Peak Detection (both traces coincide) (both traces coincide) If the traces do not coincide in the above test, refer to “Track and Hold Adjustments”...
  • Page 247 RSEN H O L D * S E L P S E L N S E L I N P U T R E S E T POS.PK* R E S E T NEG.PK* F o r T e s t P r o g r a m 6 , H O L D i s n o r m a l l y h i g h , g o i n g l o w o n l y e v e r y 8 0 msec w h i c h r e s e t s t h e p e a k d e t e c t o r s ( R E S E T P O S .
  • Page 248 HP Part Number 85662-60151 Reference HP Part Mfr Part Description Number Code Number BOARD ASSEMBLY TRACK AND HOLD 85662-60151 28480 85662-60151 : 2403~-2534~) SERIAL PREFIXES CAPACITOR-FXD .lUF +-lo% 50VDC CER 0160-4835 04222 CAPACITOR-FXD .lUF +-lo% 50VDC CER 0160-4835 04222 0180-1746...
  • Page 249 HP Part Number 85662-60151 Reference HP Part Mfr Part Description Designatior Number Code Number 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-10% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER...
  • Page 250 HP Part Number 85662-60151 Reference HP Part Mfr Part Description Designation Number Code Number 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100 91637 CMF-55-1. T-l 0757-0465 RESISTOR 1OOK +-1% .125W TF TC=O+-100 19701 0757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100 19701 0698-3157 RESISTOR 19.6K 1% .125W TF TC=O+-100...
  • Page 251 HP Part Number 85662-60151 Reference Mfr Part Description Designation Number D w Code Number 0699-1024 RESISTOR 10K +-0.01% .125W TF TC=O+-10 0757-0441 RESISTOR 8.25K +-1% .125W TF TC=O+-100 19701 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100 91637 CMF-55-1. T-l 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100...
  • Page 252 HP Part Number 85662-60165 HP Part Reference Mfr Part Description Designation Number Code Number 85662-60165 BOAR0 ASSEMBLY, TRACK AND HOLD 28480 85662-60165 : 2541~) RIAL 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0180-1746...
  • Page 253 HP Part Number 85662-60165 Reference HP Part Mfr Part Description Designation Number Code Number 0160-4835 CAPACITOR-FXO .lUF +-lo% 5OVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% SOVDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER 04222 0160-4835 CAPACITOR-FXD .lUF +-lo% 50VDC CER...
  • Page 254 HP Part Number 85662-60165 Reference HP Part Mfr Part Description Code Designatior Number Number 0698-3440 RESISTOR 196 1% .125W TF TC=O+-100 19701 0757-0442 RESISTOR IOK +-1% .125W TF TC=O+-100 19701 0757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 19701 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100...
  • Page 255 Reference HP Part Mfr Part Description Designation Number Code Number 2100-3757 RESISTOR-TRMR 100 10% TKF SIDE-AOJ 17-TF 67XR 0698-3451 RESISTOR 133K 1% .125W TF TC=O+-100 19701 2100-3750 RESISTOR-TRMR 20K 10% TKF SIDE-ADJ 17-TI; 73136 67XR 0699-1024 RESISTOR 10K +-0.01% .125W TF TC=O+-10 0757-0441 RESISTOR 8.25K +-1% .125W TF TC=O+-100...
  • Page 257 R 3 9 G P O S R 5 7 G A I N R 4 4 R 5 9 O F S R 5 2 O F S N E G...
  • Page 258 R 5 7 G A I N O F S...
  • Page 261 HP Part Number 85662160015 HP Part Reference Mfr Part Description Designatior Number Code Number 85662-60015 DIGITAL STORAGE MOTHERBOARD ASSEMBLY 2848C 85662-60015 1251-2026 CONNECTOR-PC EDGE 18 CONT/ROW 2-ROWS 1251-2026 CONNECTOR-PC EDGE 18 CONT/ROW 2-ROWS 1251-2026 CONNECTOR-PC EDGE 18 CONT/ROW 2-ROWS 1251-2026...
  • Page 264 and it provides the IF video output and the X and Y recorder outputs. Video Filter @ The Video Filter is an RC low pass filter with selectable R and C. The series resistance R is one of two values controlled by switch U7. When the switch is closed (0), R17 is short circuited and the series resistance is minimum.
  • Page 265 Log Offset Current Source @ The Log Offset Current Source simulates log gain for instrument reference levels below -60 dBm. This is achieved by offsetting the 0 V to 1 V video input signal by driving current through the source resistance R16. This current is changed by supplying different currents into the emitter of Q13, the transistor current source.
  • Page 267 Proper operation of the Log Offsets, Oslo, OS20-1, and OS20-2 can de determined from the display. Connect an HP 355D Step Attenuator between CAL OUTPUT and the input of the spectrum analyzer. Set this attenuator to 100 dB. Press Instrument Preset and key in the following...
  • Page 268 The Video Filter circuit can be checked from the front panel. With no input signal, press Instrument Preset and set the controls as follows: CENTER FREQUENCY) ........... . .
  • Page 269 R E F - 9 0 . 0 d5-n 1 0 dB/ NEG PK S P A N 1 0 0 kHz CENTER 2 5 . 0 0 0 M H z RES BW 1 kHz V B W 3 0 kHz Figure 3.
  • Page 270 HP Part Number 85662-60122 Reference HP Part C Mfr Part Description Designation Number D w Code Number 85662-60122 BOARD ASSEMBLY, VIDEO PROCESSOR 28480 85662-60122 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032...
  • Page 271 Reference HP Part Mfr Part Description Designatior Number Number Code 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1855-0213 TRANSISTOR-JFET DUAL N-CHAN D-MODE TO-71 TRANSISTOR-DUAL PNP TO-78 PD=GOOMU...

  • Page 272: Resistor 316 1% .125W Tf Tc=O

    HP Part Number 85662.60122 Reference H P Part C Mfr Part Description Number D w Code Number 0698-3444 RESISTOR 316 1% .125W TF TC=O+-100 19701 RESISTOR-TRMR 1K 10% TKF SIDE-ADJ 17-TRN 73138 RESISTOR 1.21K +-1% .125W TF TC=O+-100 0757-0274 19701 0698-5552 RESISTOR 1K +-1% .125W TF TC=O+-25...
  • Page 273 Reference HP Part Mfr Part Description Code Designatior Number Number IC DCDR TTL LS 3-TO-8-LINE 3-INP 1820-1216 1820-0586 IC INV TTL L HEX l-INP 1820-1272 IC BFR TTL LS NOR QUAD 2-INP 1902-0686 DIODE-ZNR 6.2V 2% DO-7 PD=.4U TC=+.002% 0471:...
  • Page 277 (The first five stages are in A483 Log Amplifier-Filter.) The first two stages in this assembly (Stage 6 and Stage 7) are also used in linear mode as a switchable 20 dB gain step. Following the last log stage, the 21.4 MHz IF signal is applied to a PIN diode attenuator. In log mode, this attenuation is varied with temperature to compensate for bias variations in the log stages.
  • Page 278 20 dB Linear Gain Step Stages 6 and 7 are used as a switchable 20 dB gain step in LINEAR mode at low reference levels. When the LG20 control line is high (more positive than -5 V), the QlO collector saturates to the -12 VTV supply, turning on PIN diodes CR6 and CR9 in Log Amplifier Stages 6 and 7.
  • Page 279 -12 VlV Adjustments @I The PIN Diode Attenuator adjustment (ATTEN potentiometer R61) is essentially a gain adjustment that varies the slope of the log curve. The -12 VTV adjustment (-12 VTV potentiometer R91 in the Temperature-Dependent Regulators circuit) varies the offset and slope of the log curve.
  • Page 280 If the amplitude of the displayed signals is approximately 10 dB low (CAL OUTPUT appears to be -20 dBm) in the log mode but correct in the linear display mode, then one of the log amplifier stages in the A4A3 Log Amplifier-Filter board or the A4A2 Log Amplifier-Detector board is defective.
  • Page 281 HP Part Number 85662-60132 HP Part Reference Part Description Designation Number Code Number 85662-60132 BOARD ASSEMBLY, LOG AMPLIFIER-DETECTOR 85662-60132 : 2403~-2517~) SERIAL PREFIX CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 0160-2055 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 282 Reference HP Part Mfr Part Description Designation Number Code Number CAPACITOR-FXD 43PF +-5% JOOVDC MICA -201 0902: CAPACITOR-FXD 47PF +-5% JOOVDC MICA -201 0902: CAPACITOR-FXD 12OPF +-5% 300VDC MICA O+i 0902: CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 283 HP Part Number 85662-60132 Reference HP Part Part Description Designation Number Number CORE-SHIELDING BEAD c )170-0029 CORE-SHIELDING BEAD CORE-SHIELDING BEAD CORE-SHIELDING BEAD CORE-SHIELDING BEAD CORE-SHIELDING BEAD CORE-SHIELDING BEAD 02114 91170-0029 CORE-SHIELDING BEAD 1 250-0690 CONNECTOR-RF SMB M SGL-HOLE-FR SO-OHM 1250-0690...
  • Page 284 HP Part Number 85662-60132 Reference HP Part Part Description Code Designatior Number Number 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100 9163; CMF-55-1. T-l 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100 9163; CMF-55-1. T-l 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100...
  • Page 285 HP Part Number 85662-60132 Reference HP Part Mfr Part Description Designatior Number Number 0757-0346 RESISTOR 10 +-1% .125W TF TC=O+-100 9163 CMF-55-1, T-l 0757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 1970 0757-0438 RESISTOR 5.llK +-1% .125W TF TC=O+-100 1970 0757-0458 RESISTOR 51.1K +-1% .125W TF TC=O+-100...
  • Page 286 HP Part Number 85662.60132 Reference HP Part Part Description Number Number 3757-0442 RESISTOR 10K +-1% .125W TF TC=O+-100 1970 RESISTOR 1OOK +-1% .125W TF TC=O+-100 1970 RESISTOR 10K +-1% .125W TF TC=O+-100 1970 1757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100...
  • Page 287 HP Part Number 85662-60166 Reference HP Part C Description Designation Number D Oty Code Number 85662-60166 BOARD ASSEMBLY, LOG AMPLIFIER-DETECTOR 28480 85662-60166 : 2534~) 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 288 HP Part Number 85662-60166 Reference HP Part Mfr Part Description Designatior Number Code Number 0160-2200 CAPACITOR-FXD 43PF +-5% 3ODVDC MICA -20, 0160-2307 CAPACITOR-FXD 47PF +-5% 300VDC MICA -20, 09023 0160-2205 CAPACITOR-FXD 120PF +-5X JOOVDC MICA O+; 09023 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 289 HP Part Number 85662-60166 Reference HP Part Mfr Part Description Number D QtY Designation Code Number 85662-80026 DIODE-SWITCHING DTC SELECTED 1901-0050 28480 85226-80026 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029...
  • Page 290 HP Part Reference Mfr Part Description Designatior Number Code Number TRANSISTOR NPN SI TO-18 PD=360MW 1854-0019 04713 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 04713 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 04713 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 04713 TRANSISTOR NPN SI TO-18 PD=360MW...
  • Page 291 HP Part Number 85662-60166 Reference HP Part Mfr Part Description Designation Number Code Number 0698-3444 RESISTOR 316 1% .125W TF TC=O+-100 19701 0757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100 19701 0757-0439 RESISTOR 6.81K +-1% .125W TF TC=O+-100 19701 0698-3444 RESISTOR 316 1% .125W TF TC=O+-100...
  • Page 292 HP Part Number 85662-60166 Mfr Part Description Number Code Number 0683-0275 RESISTOR 2.7 5% .25W CF TC=O-400 R-25J 0698-3989 RESISTOR 3.84K .l% .125W TF TC=O+-25 CMF-55-1 0698-8807 RESISTOR 39K +-0.1% .125W TF TC=O+-25 19701 5033R '0698-3260 RESISTOR 4641: 1% .125W TF TC=O+-100...
  • Page 294 - 1 2 V T V LG-20...
  • Page 298 signals in either a linear or log mode. In log mode the calibrated display range is 90 dB. A4A3 contains the first five of nine log stages, and A4A2 contains the last four. A4A3 also contains circuitry for using one of the log stages as a switchable 10 dB gain step. This is used only in linear mode.
  • Page 299 Bias Supplies The -12 VTV is supplied to A4A3 from A4A2. This voltage determines log diode bias current and becomes more negative as temperature increases to compensate for the increased resistance of the log diodes. The same supply is used to compensate the log diodes of the four log stages in A4A2.
  • Page 300 10 dB Linear Gain Step Stage 5 is used as a switchable 10 dB gain step in linear mode at low reference levels. When control line LGlO is low (-12 V typical), Q17 is off and CR27 is reverse biased, preventing CR27 from being a signal path.
  • Page 301 bandwidth is less than 100 kHz, BW5 is low (about -0.6 V). CR30 is reverse biased, and the LC shunt network is driven through R62, setting the filter bandwidth at about 1 MHz. The signal is buffered by Q14 and Q15. The output of buffer amplifier Q14/Q15 provides a low impedance drive for the Low-Pass Filter.
  • Page 302 If the amplitude of the displayed signals is approximately 10 dB low (CAL OUTPUT appears to be -20 dBm) in the log mode but correct in the linear display mode, then one of the log amplifier stages in the A4A3 Log Amplifier-Filter board or the A4A2 Log Amplifier-Detector board is defective.
  • Page 303 HP Part Number 85662-60009 HP Part Reference Mfr Part Description Number Number BOARD ASSEMBLY, LOG AMPLIFIER-FILTER : 2403~-3001~) PREFIXES 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1DOVDC CER 0160-2055 CAPACITOR-FXD .DlUF +80-20% 1OOVDC CER...
  • Page 304 HP Part Number 85662-60009 Reference Part Description Designation Number D w Code Number CAPACITOR-FXD 470PF +-5% 300VDC MICA D+7 0160-3533 09023 CAPACITOR-FXD 6.2pF 500V 52763 0160-2252 CAP-FXD 09023 MICA CAP-FXD 18pF 600 V 0160-0455 CAPACITOR-V TRMR-AIR 1.7-1lPF 175V PC-MT 0121-0493 74970 CAP-FXD 5.6pF 500 V...
  • Page 305 HP Part Number 85662-60009 Reference Mfr Part Description Designation Number Code Number 1901-1070 DIODE-PIN 1lOV 28480 71468 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029...
  • Page 306 HP Part Number 85662-60009 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 1853-0007 TRANSISTOR PNP 213251 SI TO-18 PD=360MW 04713 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 04713 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 04713 1854-0019...
  • Page 307 Reference HP Part Mfr Part Description Designatior Number Code Number 0757-0439 RESISTOR 6.81K +-1% .125W TF TC=O+-100 19701 0757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100 19701 0757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100 19701 0757-0447 RESISTOR 16.2K +-1% .125W TF TC=O+-100...
  • Page 308 HP Part Number 85662160009 Reference Description Designation Number D Oty Code Number 1251-0600 CONNECTOR-SGL CONT PIN 1.14~MM-BSC-SZ SQ 27264 16-06-0034 CONNECTOR-SGL CONT PIN 1.14~MM-BSC-SZ SQ 1251-0600 27264 16-06-0034 CONNECTOR-SGL CONT PIN 1.14~MM-BSC-SZ SQ 16-06-0034 1251-0600 27264 97300 0360-0124 CONNECTOR-SGL CONT PIN .04-IN-BSC-SZ...
  • Page 309 Reference HP Part Mfr Part Description Number Code Number BOARD ASSEMBLY, LOG AMPLIFIER-FILTER 85662-60246 (SERIAL PREFIXES: 3001A AND ABOVE) 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER 0160-2055 CAPACITOR-FXD .DlUF +80-20% 1OOVDC CER...
  • Page 310 Reference HP Part Mfr Part Description Number Number 0160-3533 CAPACITOR-FXD 470PF +-5% JOOVDC MICA 0+ 0160-2252 CAPACITOR-FXD 6.2pF 500V 5276: 0160-0839 CAP-FXD 1lOpF 300 V MICA 0902: CAP-FXD 18pF 600 V 0121-0493 CAPACITOR-V TRMR-AIR 1.7-1lPF 175V PC-M 187-0306-125 0160-2251 CAP-FXD 5.6pF 500 V...
  • Page 311 HP Part Number 85662-60246 Reference HP Part Mfr Part Description Designation Number Code Number 1901-1070 DIODE-PIN 1lOV 2848C 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 1901-1085 DIODE-SCHOTTKY SM SIG 2848C 1901-1085 DIODE-SCHOTTKY SM SIG 2848C 1901-1085 DIODE-SCHOTTKY SM SIG 2848C 1901-1085...
  • Page 312 HP Part Number 85662.60246 Reference HP Part Mfr Part Description Number Number 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1854-0019 TRANSISTOR NPN SI TO-18 PD=36OMW 0471: 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1854-0686 TRANSISTOR NPN SI TO-72 PD=2OOMW FT=4GH.
  • Page 313 HP Part Number 85662160246 Reference HP Part Part Description Designation Number Code Number 0757-0447 RESISTOR 16.2K +-1% .125W TF TC=O+-100 19701 0757-0447 RESISTOR 16.2K +-1% .125W TF TC=O+-100 19701 RESISTOR 3.16K +-1% .125W TF TC=O+-100 19701 0698-3444 RESISTOR 316 1% .125W TF TC=O+-100...
  • Page 314 HP Part Number 85662-60246 Mfr Part HP Part Reference Description Code Number Designation Number 16-06-0034 1251-0600 CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ SQ 16-06-0034 CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ SQ 1251-0600 16-06-0034 CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ SQ 1251-0600 16-06-0034 CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ SQ 1251-0600 CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ SQ...
  • Page 316 7 V T Y P...
  • Page 317 C R 1 5 C R 3 3 C R 3 4 C R 1 8 C R 3 5 R 8 3 c 5 5 C T R R 6 7 1 .2V T Y P 7 V T Y P...
  • Page 320 have a switchable gain input amplifier, and it has an extra stage of crystal filtering. Only the 10 dB Gain Input Buffer Amplifier will be described here. For descriptions of the other circuits in A4A4, refer to descriptions of the corresponding circuits in A4A8. Input Buffer Amplifier @ The 10 dB Input Buffer Amplifier (Figure 1) functions as a noninverting op amp.
  • Page 321 Figure 2. A4A4 Input Buffer Amplifier, Current Sinks 2 A4A4...
  • Page 322 HP Part Number 85662-60142 Mfr Part Reference HP Part C Description Designation Number D w Code Number 85662-60142 BOARD ASSEMBLY. BANDWIDTH FILTER 28480 85662-60142 PREFI : 2403~-2648~) SERIAL 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 323 HP Part Number 85662-60142 Reference HP Part Mfr Part Description Designation Number Number Code 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4833 CAPACITOR-FXD .022UF +-lo% 1OOVDC CER...
  • Page 324 HP Part Number 85662-60142 Reference HP Part Mfr Part Description Designation Number Code Number 1901-0535 DIODE-SCHOTTKY SM SIG 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 1901-0535 DIODE-SCHOTTKY SM SIG 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 71466 DIODE-SWITCHING 20V 75MA 1ONS DO-35...
  • Page 325 HP Part Number 85662-60142 Reference Mfr Part Description Number Code Number 9100-1618 INDUCTOR RF-CH-MLD 5.6UH +-lo% .166D-IN 1537-30 9100-1620 INDUCTOR RF-CH-MLD 15UH +-lo% .166D-INX 99801 1537-40 9100-1618 INDUCTOR RF-CH-MLD 5.6UH +-lo% .166D-IN 1537-30 9140-0114 INDUCTOR RF-CH-MLD 1OUH +-lo% .166D-INX 99801...
  • Page 326 HP Part Number 85662.60142 Reference HP Part Part Description Designation Number Number RESISTOR 237 1% .125U TF TC=O+-100 1970 1757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100 1970. RESISTOR 5.621: +-1% .125U TF TC=O+-100 1970: RESISTOR 14.7K 1% .125W TF TC=O+-100 1970: RESISTOR 14.7K 1% .125W TF TC=O+-100...
  • Page 327 HP Part Number 85662060142 Reference HP Part Description Number Code Number 0757-0317 RESISTOR 1.33K +-1X .125W TF TC=D+-100 1970 0757-0290 RESISTOR 6.19K +-1% .125W TF TC=D+-100 1970. 0757-0290 RESISTOR 6.19K +-1% .125W TF TC=D+-100 1970: 0757-0417 RESISTOR 562 +-1% .125W TF TC=D+-100...
  • Page 328 HP Part Number 85662-60189 Reference HP Part C Mfr Part Description Designation Number D *y Code Number 85662-60189 BOARD ASSEMBLY, BANDWIDTH FILTER 85662-60189 28480 (SERI : 2810~) AL PR 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVOC CER 04222 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 329 HP Part Number 85662-60189 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 330 HP Part Number 85662-60189 Reference HP Part Mfr Part Description Designation Number Code Number 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 71461 DIODE-PIN 1lOV DIODE-PIN 1lOV DIODE-SCHOTTKY SM SIG DIODE-SWITCHING 20V 75MA 1ONS DO-35 7146E DIODE-SCHOTTKY SM SIG 901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35...
  • Page 331 Reference HP Part Mfr Part Description Code Designation Number Number 9140-0453 INDUCTOR RF-CH-ML0 6.8UH +-5% .1660-IN: 24226 9140-0399 INDUCTOR RF-CH-ML0 2.2UH +-5% .1660-IN: 24226 9100-3560 INDUCTOR RF-CH-ML0 5.6UH +-5% .1660-IN: 24226 INDUCTOR RF-CH-ML0 5.6UH +-5% .1660-IN: 9100-3560 24226 9100-3560 INDUCTOR RF-CH-ML0 5.6UH +-5% .1660-IN:...
  • Page 332 HP Part Number 85662-60189 Reference HP Part Mfr Part Description Designation Number Code Number 0698-3441 RESISTOR 215 1% .125W TF TC=O+-100 19701 0757-0443 RESISTOR 11K +-1% .125W TF TC=O+-100 19701 0698-0082 RESISTOR 464 1% .125W TF TC=O+-100 19701 0698-3444 RESISTOR 316 1% .125W TF TC=O+-100...
  • Page 333 HP Part Number 85662-60189 Reference HP Part Mfr Part Description Designatior Number Code Number 0698-3156 RESISTOR 14.7K 1% .125W TF TC=O+-100 19701 RESISTOR 14.7K 1% .125W TF TC=D+-100 19701 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100 19701 0757-0288 RESISTOR 9.09K +-1% .125W TF TC=O+-101...
  • Page 335 C 6 7 c 4 3 c 7 3 C T R C 6 5 ‘ S Y M R 4 9 c 7 4 ‘ C T R R 4 3 C l 9 - L C C T R - C T R L C D I P...
  • Page 336 c 4 3 L C D I P - L C D I P...
  • Page 339 (from -15.9 dB to +50 dB); it d evelops a nominal +lO V bias supply; and it provides the 18.4 MHz LO frequency to A4A6Al Up Converter and A4A6A2 Down Converter. Step Gain 10 dB + Calibration @ This circuit is configured as a non-inverting operational amplifier. It provides a minimum of about 2 dB gain (adjustable by CAL potentiometer R33) and a maximum of about 12 dB (adjustable by 10 dB potentiometer R32).
  • Page 340 These attenuators normally operate over the range of 0.0 dB to 9.9 dB except in the Error Correction function when they operate over the whole range of 0.0 dB to 15.9 dB. The first three attenuation stages, A8dB, A4dB, and A2dB, are emitter followers with a resistor divider on the output of each one.
  • Page 341 This supply compensates for the effect of temperature on PIN diodes used on the A4A5, temperature coefficient is +35 mV/OC. The output voltage is derived from the following equation: where: Vn, = 3 V (the voltage applied across CR2, CR3, CR4, and R5 at Ul pin 2) and is equal to the input voltage.
  • Page 342 18.4 MHz Oscillator @ The 18.4 MHz Oscillator is basically a Colpitts oscillator with a crystal Yl in the feedback path. A simplified schematic is shown in Figure 4. Figure 4. 18.4 MHz Oscillator, Equivalent Circuit If the crystal were replaced with a large capacitor, the circuit would oscillate at the resonant frequency of the parallel resonant circuit made up of Ll, C13, C14, and C15.
  • Page 343 Operation of the Step Gains and AO.0 to A15.9 Attenuator can be determined from the display by several easy tests. The Step Gains are checked in the following way. Connect a 10 dB step attenuator between CAL OUTPUT and the input to the analyzer. Set this attenuator to 90 dB, press Instrument Preset, and key in the following: equal to the CAL OUTPUT frequency 0 Hz...
  • Page 344 through 26 give the step gain errors. Acceptable error is fl dB. Locations of the correction data are given in Table l-l. R E F . O dBm C O R R ’ D C E N T E R S P A N 1 .
  • Page 345 only a few steps are missing, refer to the control line truth tables (Tables 1 and 2 in A4A9 Troubleshooting) to determine which function is not operating properly. 0 V in the table indicates that a line is active. - 2 0 . 0 1 dB/ - 1 0 dBm C E N T E R 2 0 .
  • Page 346 S P A N Center Frequency readout will be 20.000 000 MHz for an Note HP 8568B/HP 8567A. Figure 8. 0.1 dB Step Gain Test The absolute step amplitudes can be determined with the MARKER A function. The reference steps are 0.00 dB, 0.90 dB, and 1.90 dB. In the Linear mode, the error should be less than f0.12 dB.
  • Page 347 HP Part Number 85662-60139 Reference HP Part C Mfr Part Description Designation Number D GtY Code Number 85662-60139 BOARD ASSEMBLY, STEP GAIN 28480 0160-4833 CAPACITOR-FXD .022UF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0180-0197 CAPACITOR-FXD 2.2UF+-10% LOVDC TA...
  • Page 348 HP Part Number 85662-60139 Reference HP Part Mfr Part Description Designatior Number Number 0160-4832 CAPACITOR-FXO .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0422; 0160-4832 CAPACITOR-FXO .OlUF +-lo% 1OOVDC CER 0422; 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04221 0160-4832 CAPACITOR-FXD .OlUF +-10X 1OOVDC CER...
  • Page 349 HP Part Number 85662-60139 Reference HP Part Mfr Part Description Number Code Number 9100-1624 INDUCTOR RF-CH-MLD 30UH +-5% .166D-INX.: 99800 1537-50 6960-0016 PLUG-HOLE TR-HD FOR .125-O-HOLE NYL 02766 207-080501-01-0101 85662-20148 COVER STEP GAIN 28480 86701-40001 EXTRACTOR PC 28480 86701-40001 NOT ASSIGNED 2200-0101 SCREW-MACH 4-40 .188-IN-LG PAN-HD-POZI...
  • Page 350 HP Part Number 85662-60139 Reference HP Part Mfr Part Description Designatior Number Code Number 0698-0083 RESISTOR 1.96K 1% .125W TF TC=O+-100 19701 0757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100 19701 RESISTOR 3.16K +-1% .125W TF TC=O+-100 0757-0279 19701 0757-0290 RESISTOR 6.19K +-1% .125W TF TC=O+-100...
  • Page 351 HP Part Number 85662-60139 Mfr Part HP Part Reference Description Number Number Code Designation 19701 3698-3260 RESISTOR 464K 1% .125W TF TC=O+-100 19701 1698-3435 RESISTOR 38.3 1% .125W TF TC=O+-100 19701 1698-3443 RESISTOR 287 1% .125W TF TC=O+-100 RESISTOR 147 1% .125W TF TC=O+-100...
  • Page 353 C A L F R E O Z E R O L O ONs+l3V L O OFF%+OV R 5 4...
  • Page 355 For narrow (51 kHz) bandwidths, A4A6Al Up Converter Assembly converts the 3 MHz IF signal from A4A7 3 MHz Filter to a 21.4 MHz IF signal and sends it to A4A5 Step Gain. For wide (23 kHz) bandwidths, the 21.4 MHz from A4A6A2 Down Converter is amplified and sent to A4A5.
  • Page 356 For resolution bandwidths 51 kHz, A4A6A2 Down Converter converts the 21.4 MHz IF signal from A20 Third Converter down to a 3 MHz IF signal. For resolution bandwidths 23 kHz, the 21.4 MHz is not converted but is sent through A4A6Al Up Converter to A4A5 Step Gain. Switch @ and 50 Ohm Driver @ For bandwidths >3 kHz, the SWITCH line is +15 V and Q7 is off.
  • Page 357 If the resolution bandwidths less than 3 kHz are not working properly, the fault is most likely on the Down/Up Converter or the 3 MHz Bandwidth Filter boards. If only noise is displayed, check the voltage on the SWITCH control lines. If the SWITCH line is working, the 18.4 MHz LO signal levels should be tested.
  • Page 358 HP Part Reference Mfr Part Description Designation Number Number 35662-60018 BOARD ASSEMBLY, DOWN/UP CONVERTER 85662-60018 35662-60006 BOARD ASSEMBLY, UP CONVERTER BOARD ASSEMBLY, DOWN CONVERTER 28480 85662-60005 35662-60005 CONNECTOR-RF SMB M SGL-HOLE-FR 50-OHM 1250-2112 98291 051-047-0259-220 CONNECTOR-RF St48 M SGL-HOLE-FR 50-OHM...
  • Page 359 HP Part Number 85662-60006 HP Part Reference Description Designation Number D Qty Number BOARD ASSEMBLY, UP CONVERTER 85662-60006 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER 805-504 Y~V 1032 0160-4084 CAPACITOR-FXD O.luF 50 V 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER 805-504 Y~V 1032 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER...
  • Page 360 HP Part Number 85662-60006 Reference HP Part Mfr Part Description Number Number 1853-0007 TRANSISTOR PNP 2N3251 SI TO-18 PD=360MW 0471 TRANSISTOR NPN SI TO-18 PD=360MW 0471 1854-0019 TRANSISTOR NPN SI TO-18 PD=360MW 0471 1854-0019 TRANSISTOR NPN SI TO-18 PD=360HW 0471...
  • Page 361 HP Part Number 85662-60005 Reference HP Part Mfr Part Description Number Number BOARD ASSEMBLY, DOWN CONVERTER 2848 85662-60005 CAPACITOR-FXD .OllJF +80-20% IODVDC CER CAPACITOR-FXD .OlUF +8D-20% 1OOVDC CER 805-504 Y5V 1032 cl 1160-2055 CAPACITOR-FXD .OllJF +80-20% IOOVDC CER 0 1160-2055 CAPACITOR-FXD .DlUF +80-20% 1DOVDC CER...
  • Page 362 HP Part Number 85662-60005 Reference HP Part Mfr Part Description Designatior Number Code Number 1853-0034 TRANSISTOR PNP SI TO-18 PD=36OMW 0471: 0698-0083 RESISTOR 1.96K 1% .125W TF TC=O+-ID0 19701 0757-0346 RESISTOR ID +-1% .125W TF TC=O+-100 9163; CMF-55-1, T-l 0757-0279 RESISTOR 3.16K +-1% .125W TF TC=O+-100...
  • Page 364 1 8 . 4 M H z N U L L U P C O N V E R T E R W I D E G A I N D O W N C O N V E R T E R...
  • Page 366 W I D E G A I N 1 8 . 4 M H z N U L L...
  • Page 368 controlled from 10 Hz to 300 Hz in a 1, 3, 10 sequence by lines that have the same name as the bandwidth they activate. When none of the lines is activated, the filter has a 1 kHz bandwidth. The filter has five poles which are almost identical. Only one is described in detail. Each pole has a negative output impedance to compensate for the series resistance of the crystal, but it is adjustable in only two poles.
  • Page 369 0 1 0 S U P P L Y Figure 2. Complementary Pair with Current Sink The description to this point is sufficient to understand how the circuit is biased. The 3 MHz operation is described in the following paragraphs. Potentiometer R41 is added and the signal from the collector of Q9 is fed into the base of Q7 by C28.
  • Page 370 complementary pair Q9, &lo. The sense of this current is such that the feed back is positive. The more load, the more positive feedback is developed. The more positive feedback, the more gain the amplifier has. This implies negative output impedance. The magnitude of the negative output impedance is the resistance to which R41 is set.
  • Page 371 HP Part Number 85662-60004 Reference HP Part Mfr Part Description Designatior Number Code Number BOARD ASSEMBLY, 3MHZ BANDWIDTH FILTER 85662-60004 85662-60004 0160-2055 CAPACITOR-FXO .OlUF +BO-20% 1OOVDC CER 805-504 YSV 1032 CAPACITOR-FXD 24PF +-5% SOOVDC CER 0+-3( 0160-2266 5276: 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1DOVDC CER CAP-FXD 5.lpF 500 V...
  • Page 372 HP Part Number 85662-60004 Reference HP Part Mfr Part Description Designatior Number Number 0160-2244 CAP-FXD 3pF 500 V 5276. 0160-4300 CAPACITOR-FXD .047UF +80-20% 1OOVDC CER 0180-0197 CAPACITOR-FXD 2.2UF+-10% 2OVDC TA 0180-0197 CAPACITOR-FXD 2.2UF+-10% LOVDC TA 0180-0197 CAPACITOR-FXD 2.2UF+-10% 20VDC TA 0180-0197 CAPACITOR-FXD 2.2UF+-10% LOVDC TA...
  • Page 373 Reference HP Part Mfr Part Description Designatior Number Code Number DIODE-SWITCHING 30V 5OMA 2NS DO-35 1901-0040 71468 1901-0040 DIODE-SWITCHING 30V 5OMA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 30V 5OMA 2NS DO-35 71468 DIODE-SWITCHING 30V 50MA 2NS DO-35 1901-0040 71468 DIODE-SWITCHING 30V 50MA 2NS DO-35...
  • Page 374 HP Part Number 85662-60004 Reference HP Part Mfr Part Description Designatior Number Code Number 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9100-1643 INDUCTOR RF-CH-MLD 300UH +-5% .2D-INX.45 99800 2500-02 9100-1648 INDUCTOR RF-CH-MLD 560UH +-5% .2D-INX.45...
  • Page 375 HP Part Number 85662-60004 Reference HP Part Mfr Part Description Designatior Number Code Number TRANSISTOR NPN PDJOOMW FT=200MHZ 1854-0882 1853-0034 TRANSISTOR PNP SI TO-18 PD=360MW 0471: TRANSISTOR NPN 2N5179 SI TO-72 PD=POOMW 0471: RESISTOR 8.25K +-1% .125W TF TC=O+-100 0757-0441...
  • Page 376 HP Part Reference Mfr Part Description Number Number 0757-0444 RESISTOR 12.1K +-1% .125W TF TC=O+-100 1970 0757-0444 RESISTOR 12.1K +-1% .125W TF TC=O+-100 1970 0757-0416 RESISTOR 511 +-1% .125W TF TC=O+-100 1970 0757-0405 RESISTOR 162 +-1% .125W TF TC=O+-100 1970 0757-0394 RESISTOR 51.1 +-I% .125W TF TC=O+-100...
  • Page 377 HP Part Number 85662-60004 Reference HP Part C Mfr Part Description Designation Number D W Code Number 0698-0082 RESISTOR 464 1% .125W TF TC=O+-100 19701 0757-0416 RESISTOR 511 +-1% .125W TF TC=O+-100 19701 0757-0416 RESISTOR 511 +-1% .125W TF TC=O+-100...
  • Page 378 IF-DISPLAY SECTION B A N D W I D T H F I L T E R 1 IF-VIDEO I F - V I D E O DOWN CONVERTER MOTHERBOARD MOTHERBOARD UP CONVERTER - 1 5 dEm +ZdB NOTES : THE A4A7 3 MHz BANDWIDTH FILTER COMPRISES FIVE IDENTICAL FILTER STAGES.
  • Page 379 10 Hz AMPL...
  • Page 381 are variable in bandwidth from 3 kHz to 3 MHz. The narrower bandwidths (3 kHz through 30 kHz) are obtained from five synchronously tuned crystal filters; the wider bandwidths (100 Hz through 1 kHz are obtained from A4A7 3 MHz Filter). The Bandwidth Filter assemblies are on similar printed- circuit boards.
  • Page 382 The current through QlO is determined by the difference between two current sources, one involving Q2 and the other involving Qll. (See Figure 2.) The most convenient way to find the current from each source is to measure the voltage across each emitter resistor (a 1 k Ohm resistor should be used in series with the voltmeter probe tip to prevent the circuit from oscillating and giving an erroneous reading).
  • Page 383 Output Buffer Amplifier @ The Output Buffer Amplifier is a complementary pair of transistors in which Q8 acts as a source follower boosted by Q9. The current through FET QS is set by R58: I FET = The total current through QS and Q9 is set by R59. The input is selected by the BW5 line from either CR15 in the LC mode or CR14 in the crystal/mode.
  • Page 384 S Y M 0 4 . 0 5 C R 7 P O S I T I V E F E E D B A C K Figure 5. Crystal Pole, Simplified Schematic The SYM adjustment Cl3 compensates for C, by producing a current (-11) that is equal to the current (11) through C, of the crystal but opposite in phase.
  • Page 385 Figure 6. LC Pole, Equivalent Circuit The Q (bandwidth) is set by the resistance of the PIN diode CR18. A more detailed schematic of the Second LC Pole circuit is shown in Figure 7. C R 1 8 C 6 7 c 4 9 L C D I P L 1 4...
  • Page 386 As an aid in troubleshooting, critical dc voltages for proper operation are indicated at several nodes on the accompanying schematic. If the resolution bandwidths from 3 kHz to 3 MHz have low gain or incorrect bandwidth, either this board or the A4A4 Bandwidth Filter board may be defective. To determine which board is faulty, disconnect the 97 cable from A4A8Jl and connect it to A4A6Jl.
  • Page 387 0 dBm C E N T E R 2 0 0 0 0 0 0 0 M H z S P A N 0 R E S B W 1 V B W 1 0 H z N O T E : C e n t e r F r e q u e n c y r e a d o u t w i l l b e 1 0 0 .
  • Page 388 HP Part Number 85662-60131 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60131 BOARD ASSEMBLY, ATTENUATOR-BANDWIDTH 85662-60131 28480 FILTER (SERIAL PREFIXES: 2403A-2648A) CAPACITOR-FXD 390PF +-5% 300VDC MICA 0+7 0140-0200 09023 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 0160-2055 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 389 HP Part Number 85662-60131 HP Part C Mfr Part Reference Description Designation Number D Qty Code Number 0160-0437 CAPACITOR-FXD 12pF 500 V 0160-0134 CAPACITOR-FXD 220PF +-5% 300VDC MICA 0+7 09023 0160-3456 CAPACITOR-FXD 1OOOPF +-lo% 1KVDC CER 808-542 X5E 102K 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 390 HP Part Number 85662-60131 Mfr Part Description Code Number 1901-0535 DIODE-SCHOTTKY St4 SIG 1901-1070 DIODE-PIN 1lOV 28480 1901-1070 DIODE-PIN 1lOV 2 8 4 8 0 1901-0535 DIODE-SCHOTTKY SM SIG 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD...
  • Page 391 HP Part Number 85662-60131 Reference HP Part Mfr Part Description Designatior Number Number 1853-0007 TRANSISTOR PNP 2N3251 SI TO-18 PD=360MW 0471 1855-0267 TRANSISTOR J-FET N-CHAN D-MODE TO-92 SI 3467 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 0471. 1 .853-0007 TRANSISTOR PNP 2N3251 SI TO-18 PD=360MW I .853-0007...
  • Page 392 HP Part Number 85662-60131 HP Part Mfr Part Description Number D Qty Code Number 0757-0401 RESISTOR 100 +-1% .125W TF TC=O+-100 19701 0757-0280 RESISTOR IK +-1% .125W TF TC=O+-100 19701 0698-3155 RESISTOR 4.641: 1% .125W TF TC=O+-100 19701 0698-0082 RESISTOR 464 1% .125W TF TC=O+-100...
  • Page 393 HP Part Number 85662-60190 Reference HP Part C Description Number D w Designation Code Number 85662-60190 BOARD ASSEMBLY, ATTENUATOR-BANDWIDTH 85662-60190 28480 FILTER (SERIAL PREFIX: 2810A) 0140-0200 CAPACITOR-FXO 390PF +-5% JOOVDC MICA 0+7 09023 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 394 HP Part Number 85662-60190 Reference HP Part Description Designatior Number Code Number 0160-0437 CAP-FXD 12pF 500 V 0160-0134 CAPACITOR-FXD 22OPF +-5% 300VDC MICA O+; 0902: 0160-4574 CAPACITOR-FXO 1OOOPF +-10X 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVOC CER 04222 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 395 HP Part Number 85662-60190 Reference HP Part C Description Designation Number D w Code Number 1901-0535 DIODE-SCHOTTKY SM SIG 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 71468 1901-0535 DIODE-SCHOTTKY SM SIG DIODE-PIN 1lOV 28480 DIODE-PIN 1lOV 28480 1901-0535 DIODE-SCHOTTKY SM SIG...
  • Page 396 HP Part Number 85662-60190 Mfr Part Reference HP Part C Description Designation Number D W Code Number 6960-0069 PLUG-HOLE CNCL-HD FOR .125-D-HOLE NYL 02768 207-080501-00-0101 85662-20038 COVER, ATTENUATOR-BANDWIDTH FILTER 28480 1200-0081 INSULATOR-FLG-BSHG NYLON 26365 974 307 1200-0081 INSULATOR-FLG-BSHG NYLON 26365...
  • Page 397 HP Part Number 85662160190 Reference HP Part Mfr Part Description Designation Number Code Number 0698-3156 RESISTOR 14.7K 1% .125W TF TC=O+-100 19701 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100 19701 0698-3451 0 ’ 1 RESISTOR 133K 1% .125W TF TC=O+-100...
  • Page 398 Reference HP Part Mfr Part Description Number Code Number CRYSTAL, QUARTZ, PART OF A MATCHED SET OF SIX, INCLUDES A4A4Yl-3, A4A6AlY1, ANt CRYSTAL, QUARTZ, PART OF A MATCHED SET OF SIX, INCLUDES A4A4Yl-3. A4A6AlYl. ANt *Indicates factory-selected value...
  • Page 400 H O L E c 2 9 c 3 2 R 4 0 R 4 4...
  • Page 401 c 2 9 C 3 2 R 4 0 R 4 4 L C D I P C 4 6 L C C T R R 3 5...
  • Page 404 Control information for A4 IF-Video assembly is transmitted over the Instrument Bus from the Al5 Controller and decoded by the A4A9 IF Control. Address Decoder @J The Address Decoder monitors ADR O-4 and activates the input latches for addresses 20 and 21 when control line LTIO goes low.
  • Page 405 IF Gain Control (6~ The IF Gain Control interfaces with A4A5 Step Gain, the Log Amplifiers in A4A2, A4A3, and Bandwidth Control @ Bandwidths from 3 MHz to 100 kHz (BW 2 +14.8V) These bandwidths are produced in the 21.4 MHz IF by four parallel tank circuits (two in determines bandwidth) is controlled by PIN diodes used as variable resistors.
  • Page 406 VBW 3 kHz Center Frequency readout will be 20.000 000 MHz for an Note HP 8568B/HP 85678. Figure 1. 0.1 dB Step Gain Display The absolute step amplitudes can be determined with the MARKER A function. The reference steps are 0.0 dB and 0.9 dB. In the Linear mode the error should be less than The 1 dB, 1.4 dB, and 1.8 dB steps are controlled by factory selected resistors.
  • Page 407 Tables 1 through 8 provide information that is useful in troubleshooting the A4A9 IF Control Assembly. Table 1 (0.0 to -1.9 dB Control Truth Table) and Table 2 (0 to -9 dB Control Truth Table) illustrate the A4A9 IF Control control line switching for the A4A5 Step Gain variable and fixed attenuators.
  • Page 408 Table 1. 0.0 to -1.9 dB Control Truth Table (Levels at Output of Latch U20)* Table 2. 0 to -9 dB Control Truth Table (Levels at Output of Latches U18 and U20)* Table 3. Resolution Bandwidth Truth Table Resolution RBW D RBW C RBW B RBW A Bandwidth 3 M H z lHlHlHlH...
  • Page 409 Table 4. Video Bandwidth Truth Table 6 A4A9...
  • Page 410 Table 5. 10 dB Gain Step Truth Table (Levels at Output of Latches UlO and U17)* Reference Level - 1 0 - 2 0 - 3 0 - 4 0 -50 - 6 0 - 7 0 -80 - 9 0 - 1 0 0 - 1 1 0 Res BW 23 kHz Reference Level...
  • Page 411 Table 6. Bandwidth Control Lines (All Voltages Approximate) 300 Hz 100 Hz 30 Hz 10 Hz Table 7. Address Line Truth Table Table 8. Log Expand Truth Table 8 A4A9...
  • Page 412 HP Part Number 85662-60147 Reference HP Part Mfr Part Description Number Code Number 85662-60147 BOARD ASSEMBLY, IF CONTROL 85662-60147 (SERIA : 2403~-2810~) L PREFIXES 0180-0197 CAPACITOR-FXO 2.2lJF+-10% ZOVOC TA 0180-0197 CAPACITOR-FXO 2.2UF+-10% LOVOC TA 0180-0197 CAPACITOR-FXO 2.2UF+-10% ZOVDC TA 56285 0180-0197 CAPACITOR-FXD 2.2UF+-10%...
  • Page 413 HP Part Number 85662-60147 Reference HP Part Mfr Part Description Designatior Number Code Number 1853-0281 TRANSISTOR PNP 2N2907A SI TO-18 PD=400M 0471: 1853-0281 TRANSISTOR PNP 2N2907A SI TO-18 PD=400Ml 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 0471: 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW...
  • Page 414 HP Part Number 85662060147 Reference HP Part Part Description Designation Number Code Number 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100 19701 0757-0419 RESISTOR 681 +-1% .125W TF TC=O+-100 19701 0757-0438 RESISTOR 5.11K +-1% .125W TF TC=O+-100 19701 0698-0083 RESISTOR 1.96K 1% .125W TF TC=O+-100...
  • Page 415 HP Part Number 85662.60202 Reference HP Part Mfr Part Description Designatior Number Number 85662-60202 BOARD ASSEMBLY, IF CONTROL 85662-60202 : 2813~-2816~) PREFIXES 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0422; 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0422; 0160-4832 CAPACITOR-FXO .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 416 Reference HP Part Mfr Part Description Designation Number Code Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35...
  • Page 417 HP Part Number 85662-60202 Reference Mfr Part Description Designation Number D Qty Code Number 0757-0460 RESISTOR 61.9K +-1% .125W TF TC=O+-100 19701 0698-3460 RESISTOR 4221: 1% .125W TF TC=O+-100 19701 0698-3450 RESISTOR 42.2K 1% .125W TF TC=O+-100 19701 0698-8824 RESISTOR 5621: +-1% .125W TF TC=O+-100...
  • Page 418 HP Part Number 85662-60202 Reference HP Part Mfr Part Description Designatior Number Code Number 1820-1196 IC FF TTL LS D-TYPE POS-EDGE-TRIG COM Cl 1820-2024 IC DRVR TTL LS LINE DRVR OCTL 1810-0280 NETWORK-RES lo-SIP lO.OK OHM X 9 1902-3203 DIODE-ZNR 14.7V 5% DO-35 PD=.4W...
  • Page 419 HP Part Number 85662-60222 Reference HP Part Mfr Pat-l Description Designation Number Code Number IF CONTROL BOARD ASSEMBLY 85662-60222 28480 85662-60222 (SERIAL PREFIX: 2848A) 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-10x 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-10x 1OOVDC CER...
  • Page 420 HP Part Number 85662-60222 Reference HP Part Mfr Part Description Designatior Number Code Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 DIODE-SWITCHING 80V 200MA 2NS DO-35...
  • Page 421 HP Part Number 85662-60222 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 0698-3457 RESISTOR 316K 1% .125W TF TC=O+-100 19701 0698-3458 RESISTOR 3481: 1% .125W TF TC=O+-100 19701 0698-3161 RESISTOR 38.3K 1% .125W TF TC=O+-100...
  • Page 422 HP Part Number 85662-60222 Reference H P Part C Mfr Part Description Designation Number D Qty Code Number 1826-0990 IC OP AMP GP DUAL 8-DIP-C PKG 04713 1820-0468 IC DCDR TTL BCD-TO-DEC 4-TO-lo-LINE 4-IN 01295 1858-0076 TRANSISTOR ARRAY 14-PIN PLSTC TO-116...
  • Page 423 I F - V I D E O I F-V I DE0 MOTHERBOARD STEP GAIN MOTHERBOARD LATCHES F I L T E R CONTROL PROCESSOR ADDRESS DETECTOR DECODER REGULATOR...
  • Page 424 R 6 0 R 6 1 R 6 2 0 1 0 R 6 5 0 2 0 0 2 1 0 2 6 0 2 5 0 2 9 0 2 6 a c 3 + I C R ( J I...
  • Page 425 3 kHz R 6 5 R 6 2 - 3 0 0 1 M H z R 6 0 3 M H z U 1 6 u 1 7...
  • Page 426 S E E E X P L O D E D V I E W S u 1 5 CR23...
  • Page 427 E X P L O D E D V I E W S R 8 3 C R 2 3 kHz R 6 5 R 8 4 C R 3 R T 3 C R 4 R 8 5 C R 5 R-60 3 M H z T O P V I E W...
  • Page 431 HP Part Number 85662-60149 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60149 IF-VIDEO MOTHERBOARD ASSEMBLY 85662-60149 0180-1746 CAPACITOR-FXD 15UF+-10% POVDC TA 1500156X902082-DYS 0180-0229 CAP-FXD 33uF 10 V TA 0180-1746 CAPACITOR-FXD 15UF+-10% LOVDC TA 0160-4833 CAPACITOR-FXD .022UF +-lo% 1OOVDC CER...
  • Page 432 HP Part Number 85662-60149 Reference HP Part C Mfr Part Description Designation Number D Oty Code Number 1251-0472 CONNECTOR-PC EDGE 6-CONT/ROW L-ROWS 220-620-03 26742 1251-0472 CONNECTOR-PC EDGE 6-CONT/ROW L-ROWS 220-620-03 26742 1251-0472 CONNECTOR-PC EDGE 6-CONT/ROW 2-ROWS 26742 220-620-03 CONNECTOR-PC EDGE 6-CONT/ROW 2-ROWS...
  • Page 433 I.10...
  • Page 435 Options The HP 85662A IF-Display Section has several options that may be ordered. Each option is listed below with a brief description of the option and the changes to the IF-Display Section. Three of these options (Option 067, Option H96, and Option 462) require substantial printed circuit board changes and have separate sections in this manual.
  • Page 436 Option 462 HP 8566B Option 462 and HP 8568B Option 462 Spectrum Analyzers This option is the Impulse Bandwidth/6 dB Bandwidth option. Resolution bandwidths from 1 kHz through 3 MHz are impulse bandwidths. Resolution bandwidths from 10 Hz through 300 Hz are 6 db bandwidths.
  • Page 437 Option 067 HP 85662A Option 067 is the IF-Display Section that is used with the HP 8567A Spectrum Analyzer. This option has a minimum resolution bandwidth of 1 kHz. Refer to Hewlett-Packard Test and Measurement Catalog for additional information regarding the HP 8567A Spectrum Analyzer.
  • Page 438 Input Buffer @ The input buffer has about 6 dB of gain to compensate for the loss incurred by the output driver in A4A6A2, which converts the 21.4 MHz IF signal into a 500 system. Output Driver @ The 21.4 MHz IF signal goes to the output driver, where it is converted to a 50R system (6 dB loss) and sent to A4A6Al.
  • Page 439 Tables 1 through 8 provide information that is useful in troubleshooting the A4A9 IF Control Assembly. Table 1. 0.0 to -1.9 dB Control Truth Table (Levels at Output of Latch U20)* Table 2. 0 to -9 dB Control Truth Table (Levels at Output of Latches U18 and U20)* Table 3.
  • Page 440 Table 4. Video Bandwidth Truth Table Table 5. 10 dB Gain Step Truth Table (Levels at Output of Latches UlO and Ul7)* All RBWs OS10 LG20 Input attenuation setting at 0 dB; shift attenuator (for extended ranges). * Latches US and U9 on early version of A4A9 IF Control. 4 Option 067...
  • Page 441 Table 6. Bandwidth Control Lines (All Voltages Approximate) Resolution Control Links Bandwidth 3 MHz +14.8 V -14.0 V -14.0 V +9.7 V 300 kHz 100 kHz 3 0 kHz -0.6 V +14.3 V +14.3 V +14.3 V 1 0 kHz - 0 .
  • Page 442 HP Part Number 85662.60172 Reference HP Part Part Description Designation Number Code Number 85662-60172 067) 28480 85662-60172 BOARD ASSEMBLY STEP GAIN OPTION CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 04222 CAPACITOR-FXD 2.2UF+-10% POVDC TA 0180-0197 56289 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 443 HP Part Number 85662-60172 Reference HP Part Mfr Part Description Designation Number Code Number DIODE-SWITCHING 1901-1117 DIODE-SWITCHING 1901-1070 DIODE-PIN 1lOV 28480 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD...
  • Page 444 HP Part Number 85662-60172 Mfr Part Reference HP Part Description Designatior Number Number 2100-3163 RESISTOR-TRMR 1M 20% TKF SIDE-ADJ 17-TRI 73131 0757-0465 RESISTOR 1OOK +-I% .125W TF TC=O+-100 1970: 0698-3132 RESISTOR 261 1% .125W TF TC=O+-100 1970: 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100...
  • Page 445 HP Part Number 85662-60172 Reference HP Part Description Designatior Code Number Number RESISTOR 31.6 +-I% .125W TF TC=O+-100 1970: RESISTOR 100 +-1X .125W TF TC=O+-100 1970: RESISTOR 10 +-1% .125W TF TC=O+-100 9163; CMF-55-1, T-l CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ 16-06-0034...
  • Page 446 C A L , yy (Option 067 Tab)
  • Page 448 HP Part Number 85662-60177 HP Part tvlfr Part Reference Description Code Number Designation Number 85662-60177 BOARD ASSEMBLY, BUFFER 28480 BOARD ASSEMBLY, INPUT BUFFER 28480 85662-60171 85662-60171 28480 85662-60170 BOARD ASSEMBLY, OUTPUT DRIVER CONNECTOR-RF SMB M SGL-HOLE-FR 50-OHM 98291 051-047-0259-220 1250-2112...
  • Page 449 HP Part Number 85662-60170 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60170 BOARD ASSEMBLY, OUTPUT DRIVER 28480 85662-60170 (OPTION 067) 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 0160-4084 CAP-FXD O.luF 50 V 56289 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER...
  • Page 450 HP Part Number 85662-60171 HP Part Reference Description Designatior Number Code Number 85662-60171 BOARD ASSEMBLY, INPUT BUFFER 85662-60171 (OPTION 067) 0160-4084 CAP-FXD O.luF 50 V 56282 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 451 I F - D I S P L A Y S E C T I O N I F-V I DE0 MOTHERBOARD 2 1 . 4 M H z 2 1 .4 M H z 2 1 . 4 MHZ-: 6 J 1 3 w 3 7 w 3 3...
  • Page 452 (Option 067 Tab)
  • Page 453 (Option 067 Tab)
  • Page 455 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-6016s 067) 85662-60169 IF CON OPTION : 2542~-2810~) PREFIXES 0180-0197 CAPACITOR-FXD 2.2UF+-10% ZOVDC TA 56282 0180-0197 CAPACITOR-FXD 2.2UF+-10% 20VDC TA 0180-0197 CAPACITOR-FXD 2.2UF+-10% 20VDC TA 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 456 HP Part Number 85662-60169 Reference Mfr Part Description D ’ Code Number RESISTOR 10K +-1% .125W TF TC=O+-100 1970: RESISTOR 10K +-1% .125W TF TC=O+-100 1970: 0698-0085 RESISTOR 2.61K 1% .125W TF TC=O+-100 19701 0698-0085 RESISTOR 2.61K 1% .125W TF TC=O+-100...
  • Page 457 HP Part Number 85662-60169 Reference HP Part Mfr Part Description Designation Number Code Number CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ 27264 16-06-0034 CONNECTOR-SGL CONT PIN 1.14-MM-BSC-SZ 27264 16-06-0034 SCREENED 1826-0092 IC 1458 M2 OP AMP 5081-8117 IC DCDR TTL LS BCD-TO-DEC 4-TO-lo-LINE 1...
  • Page 458 HP Part Number 85662-60200 Mfr Part Description Code Number 1 1 BOARD 85662-60200 ASSEMBLY OPTION PREFIXES 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 459 HP Part Number 85662-60200 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 8DV 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35...
  • Page 460 HP Patt Number 8566240200 Reference HP Part Mfr Part Description Designatior Number Code Number 0757-0460 RESISTOR 61.9K +-1X .125W TF TC=O+-100 CRB14 OR CR825 0698-3460 RESISTOR 422K 1% .125W TF TC=O+-100 CRB14 OR CRB25 0698-3450 RESISTOR 42.2K 1% .125W TF TC=O+-100...
  • Page 461 HP Part Number 85662-60200 Reference HP Part Mfr Part Description Designation Number Code Number 1820-0471 IC INV TTL HEX l-INP 1820-1196 IC FF TTL LS D-TYPE POS-EDGE-TRIG COM CL 1820-2024 IC DRVR TTL LS LINE DRVR OCTL NETWORK-RES lo-SIP lO.OK OHM X 9 750-101 DIODE-ZNR 14.7V 5% DO-35 PD=.4W...
  • Page 462 HP Part Number 85662-60224 H P Part C Reference Mfr Part Description Designation Number D Qty Code Number 85662-60224 28480 85662-60224 D ASSEMBLY IF : 2848~) SERIAL PREFIX 0160-4832 CAPACITOR-FXD .OlUF +-IO% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 463 HP Part Number 85662-60224 Reference HP Part Mfr Part Description Number Number 1901-0050 DIODE-SWITCHING 8OV 20DMA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35...
  • Page 464 Reference HP Part Mfr Part Description Designation Number Code Number 0698-0084 RESISTOR 2.15K 1% .125W TF TC=O+-100 19701 RESISTOR 2.15K 1% .125W TF TC=O+-100 19701 RESISTOR 42.21: 1% .125W TF TC=O+-100 0698-3450 19701 0757-0466 RESISTOR 1lOK +-1% .125W TF TC=O+-100...
  • Page 465 HP Part Number 85662-60224 Reference HP Part Part Description Number Code Number 0837-0380 THERMISTOR TUB WITH AXL LEADS 50K-OHM MSC 503K 0837-0380 THERMISTOR TUB WITH AXL LEADS 50K-OHM MSC 503K 0837-0007 THERMISTOR DISC lOK-OHM TC=-4.4%/C-DEG 15801 0837-0393 THERMISTOR DISC 5K-OHM...
  • Page 466 R 6 0 R 6 1 R 6 2 1 0 K H z R 6 6 3 K H z 0 2 0 0 2 1 R 7 3 (Option 067 Tab)
  • Page 467 R 6 6 3 kHz ‘ R 6 6 3 kHz R 6 2 1 M H z 3 M H z (Option 067 Tab)
  • Page 468 S E E E X P L O D E D V I E W S c 2 2 + (Option 067 Tab)
  • Page 469 E X P L O D E D V I E W S R 7 3 R 8 8 1 kHz C R 2 R 8 4 C R 3 C R 4 R 6 2 C R 5 R 6 0 R 8 6 R 8 7 3 M H z...
  • Page 471 Option H96 HP 85662A Option H96 is the IF-Display Section that is used with the HP 8568B Option E96 and the HP 8568B Option E44 Spectrum Analyzers. This option does not have 10 Hz and 3 MHz resolution bandwidths. The following Option H96 assemblies are covered in this manual: The parts list for this assembly is located in this section.
  • Page 472 Tables 1 through 8 provide information that is useful in troubleshooting the A4A9 IF Control Assembly. Table 1. 0.0 to -1.9 dB Control Truth Table (Levels at Output of Latch U20)* Table 2. 0 to -9 dB Control Truth Table (Levels at Output of Latches U18 and U20)* Table 3.
  • Page 473 Table 4. Video Bandwidth Truth Table Option H96 3...
  • Page 474 Table 5. 10 dB Gain Step Truth Table (Levels at Output of Latches UlO and U17)* Reference Level Reference Level A10 dB A20 dB Latches U8 and U9 on early version of A4A9 IF Control. 4 Option H96...
  • Page 475 Table 6. Bandwidth Control Lines (All Voltages Approximate) Resolution Control Links Bandwidth B W 63 B W 68 Switch 300 Hz 100 Hz B W 5 B W 7 30 Hz 1 MHz +14.8 V -14.0 V - 1 4 . 0 v +13.1 v +14.7 v < - 1 0 v < - 1 0 v < - 1 0 v 1 0 0 kHz +14.8 V - 1 4 .
  • Page 476 HP Part Number 85662-60174 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60174 BOARD ASSEMBLY, 3MHZ BANDWIDTH FILTER 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 805-504 Y~V 1032 CAPACITOR-FXD 24PF +-5% SOOVDC CER 0+-30 0160-2266 5276: CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER...
  • Page 477 HP Part Number 85662-60174 Reference HP Part Mfr Part Description Designatior Number Code Number 0160-2055 CAPACITOR-FXD .OlUF +BO-20% 1OOVDC CER 805-504 Y~V 1032 0160-2244 CAP-FXD 3pF 500 V 5276: 0160-4300 CAPACITOR-FXD .D47UF +80-20% 1OOVDC CER CAPACITOR-FXD 2.2UF+-10% 20VDC TA 56286 CAPACITOR-FXD 2.2UF+-10%...
  • Page 478 HP Part Number 85662-60174 Part Description Code Number 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 71468 DIODE-SWITCHING 30V 50MA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 3DV 50MA 2NS DO-35 71468 DIODE-SWITCHING 3DV 50MA 2NS DO-35...
  • Page 479 HP Part Number 66662.60174 Reference HP Part Description C o d e Number Number 9170-0029 CORE-SHIELDING BEAD CORE-SHIELDING BEAD 9170-0029 CORE-SHIELDING BEAD 9170-0029 CORE-SHIELDING BEAD 9170-0029 CORE-SHIELDING BEAD 9100-1643 INDUCTOR RF-CH-MLD 300UH +-5% .20-INX.4! 2500-02 9100-1648 INDUCTOR RF-CH-ML0 560UH +-5X .2D-INX.4!
  • Page 480 HP Part Number 85662160174 Mfr Part Description Code Number 1854-0023 TRANSISTOR NPN SI TO-18 PD=360MW 25403 TRANSISTOR NPN PD=JOOMW FT=200MHZ 1854-0882 56289 1853-0034 TRANSISTOR PNP SI TO-18 PD=36OMW 04713 1854-0345 TRANSISTOR NPN 215179 SI TO-72 PD=LOOMW 04713 215179 0757-0441 RESISTOR 8.25K +-1% .125W TF TC=O+-100 19701 RESISTOR 10K +-1% .125W TF TC=O+-100...
  • Page 481 HP Part Number 85662-60174 Reference HP Part C Mfr Part Description Designation Number D Qty Code Number 0757-0420 RESISTOR 750 +-1% .125W TF TC=O+-100 19701 0757-0444 RESISTOR 12.lK +-1% .125W TF TC=D+-100 19701 0757-0444 RESISTOR 12.1K +-1% .125W TF TC=O+-100...
  • Page 482 HP Part Number 85662-60174 Reference HP Part Mfr Part Description Designation Number Code Number 0698-3437 RESISTOR 133 1% .125W TF TC=O+-100 19701 0698-0082 RESISTOR 464 1% .125W TF TC=O+-100 19701 0757-0416 RESISTOR 511 +-1% .125W TF TC=O+-100 19701 RESISTOR 511 +-1% .125W TF TC=O+-100...
  • Page 483 HP Part Number 85662-60173 Reference HP Part Mfr Part Description Designation Number Code Number BOARD ASSEMBLY. IF CONTROL (OPTION H96) 85662-60173 28480 85662-60173 : 2517~-2810~) SERIAL PREFIXES 0180-0197 CAP-FXD 2.2uF 20 V TA 56289 CAP-FXD 2.2uF 20 V TA 0180-0197 56289 CAP-FXD 2.2uF 20 V TA...
  • Page 484 HP Part Number 85662.60173 HP Part Reference Mfr Part Description Designatior Number Code Number 1853-0281 TRANSISTOR PNP 2N2907A SI TO-18 PD=4OOMb 04713 1853-0281 TRANSISTOR PNP 2N2907A SI TO-18 PD=400ML 04713 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW 04713 1854-0404 TRANSISTOR NPN SI TO-18 PD=360MW...
  • Page 485 HP Part Number 85662-60173 Reference HP Part Mfr Part Description Designation Number Code Number 0757-0419 RESISTOR 681 +-1% .125W TF TC=O+-100 CR814 OR CRB25 0757-0438 RESISTOR 5.11K +-1% .125W TF TC=O+-100 CRB14 OR CR825 0698-0083 RESISTOR 1.96K 1% .125W TF TC=O+-100...
  • Page 486 HP Part Number 85662-60201 Reference HP Part Mfr Part Description Designation Number Code Number 85662-60201 BOARD ASSEMBLY. IF CONTROL (OPTION H96) 28480 85662-60201 (SERIAL PREFIXES: 2813A-2816A) 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXO .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OllJF +-lo% 1OOVDC CER...
  • Page 487 HP Part Number 85662.60201 Reference HP Part Description Designation Number Code Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 2DOMA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35...
  • Page 488 HP Part Number 85662-60201 Reference HP Part Description Designatior Number Code Number 0757-0460 RESISTOR 61.9K +-1% .125W TF TC=O+-100 CRB14 OR CRB25 0698-3460 RESISTOR 4221: 1% .125W TF TC=O+-100 CRB14 OR CRB25 0698-3450 RESISTOR 42.2K 1% .125W TF TC=O+-100 CR814 OR CRB25 0698-8824 RESISTOR 5621: +-1% .125W TF TC=O+-100...
  • Page 489 HP Part Number 85662-60201 Reference HP Part Description Designatior Number Code Number 1820-1196 IC FF TTL LS D-TYPE POS-EDGE-TRIG COM Cl 1820-2024 IC DRVR TTL LS LINE DRVR OCTL 1810-0280 NETWORK-RES lo-SIP lO.OK OHM X 9 1123E 750-101 1902-3203 DIODE-ZNR 14.7V 5% DO-35 PD=.4W 1902-0041 DIODE-ZNR 5.11V 5% DO-35 PD=.W...
  • Page 490 HP Part Number 85662-60225 Reference HP Part Mfr Part Description Designatior Number Code Number 85662-60225 85662-60225 BOARD OPTION : 2848~) SERIAL PREFIX 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 491 HP Part Number 85662-60225 Reference HP Part Mfr Part Description Designatior Number Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING BOV 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 0360-0124 CONNECTOR-SGL CONT PIN .04-IN-BSC-SZ RNI...
  • Page 492 HP Part Number 85662-60225 Reference Mfr Part Description Designation Number Code Number 0698-3161 RESISTOR 38.31: 1% .125W TF TC=O+-100 19701 0757-0462 RESISTOR 75K +-1% .125W TF TC=O+-100 19701 0757-0464 RESISTOR 90.9K +-1% .125W TF TC=O+-100 19701 0698-8960 RESISTOR 750K +-1% .125W TF TC=O+-100...
  • Page 493 HP Part Number 85662-60225 Reference HP Part Mfr Part Description Designatior Number Number Code 1858-0076 TRANSISTOR ARRAY 14-PIN PLSTC TO-116 04713 1858-0076 TRANSISTOR ARRAY 14-PIN PLSTC TO-116 04713 1810-0277 NETWORK-RES lo-SIP 2.2K OHM X 9 91637 1820-0468 IC DCDR TTL BCD-TO-DEC 4-TO-IO-LINE 4-IN...
  • Page 494 R 6 0 R6 1 R 6 2 u 1 4 1 0 K H z R 6 6 (Option H96 Tab)
  • Page 495 R 6 6 3 kHz R 6 5 R 6 2 - 3 0 0 1 M H z 3 M H z (Option H96 Tab)
  • Page 496 S E E E X P L O D E D V I E W S (Option H96 Tab)
  • Page 497 E X P L O D E D V I E W S R 8 3 C R 2 R 6 6 3 kHz R 6 5 R 8 4 C R 3 R T 2 R T 3 C R 4 R 8 5 C R 5 R 8 7...
  • Page 499 Option 462 HP 85662A Option 462 is the IF-Display Section that is used with the HP 8566B Option 462 and the HP 8568B Option 462 Spectrum Analyzers. This is the Impulse Bandwidth/6 dB Bandwidth option. Resolution bandwidths from 1 kHz through 3 MHz are impulse bandwidths.
  • Page 500 Control information for A4 IF-Video assembly is transmitted over the Instrument Bus from the Al5 Controller and decoded by the A4A9 IF Control. Address Decoder @ The Address Decoder monitors ADR O-4 and activates the input latches for addresses 20 and 21 when control line LTIO goes low.
  • Page 501 the filters go to their highest Q (determined by factory-selected resistors), which yields the 100 kHz bandwidth. Bandwidths from 30 kHz to 3 kHz (BW7 = -0.6v) These bandwidths are produced in the 21.4 MHz IF by five crystal filters (two in A4A8 and three in A4A4).
  • Page 502 RES SW 3 MHz (1) Center Frequency readout will be 20.000 000 MHz for an Note HP 8568B/HP 85678. Figure 1. 0.1 dB Step Gain Display The absolute step amplitudes can be determined with the MARKER A function. The reference steps are 0.0 dB and 0.9 dB. In the Linear mode the error should be less than f0.12 dB.
  • Page 503 Table 1. 0.0 to -1.9 dB Control Truth Table (Levels at Output of Latch U20)* Table 2. 0 to -9 dB Control Truth Table (Levels at Output of Latches U18 and U20)* Table 3. Resolution Bandwidth Truth Table Option 462 5...
  • Page 504 Table 4. Video Bandwidth Truth Table 100 Hz 10 Hz 3 Hz 6 Option 462...
  • Page 505 Table 5. 10 dB Gain Step Truth Table (Levels at Output of Latches UlO and Ul7)* Reference Level - 1 0 - 2 0 - 3 0 - 4 0 - 5 0 - 6 0 - 7 0 - 9 0 - 1 0 0 - 1 1 0 - 8 0 Res BW 23 kHz...
  • Page 506 Table 6. Bandwidth Control Lines (All Voltages Approximate) 3 0 kHz -0.6 V +14.3 V +14.3 V 1 0 kHz - 0 . 6 V +9.3 V +9.3 V < - 1 0 v <-1ov < - 1 0 v 3 kHz - 0 .
  • Page 507 HP Part Number 85662.60184 Description Code Number 85662-60184 BOARD ASSEMBLY, BANDWIDTH FILTER 28480 85662-60184 (OPTION 462) 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-IO% 1OOVDC CER 04222 0160-5899 CAPACITOR-FXD 7.5PF +-.5PF EOOVDC CER 0-t 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 508 Reference HP Part Description Designatior Number Number 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0422; 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04221 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0422; 0160-4833 CAPACITOR-FXD .022UF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 509 HP Part Number 85662-60184 Reference HP Part Mfr Part Description Designation Number Code Number DIODE-SWITCHING 20V 75MA 1ONS DO-35 1901-0047 1901-1070 DIODE-PIN 1lOV 2848C DIODE-PIN 1lOV 2848C 1901-0535 DIODE-SCHOTTKY SM SIG 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 71468 1901-0535 DIODE-SCHOTTKY SM SIG...
  • Page 510 HP Part Number 85662060184 Reference HP Part Mfr Part Description Designatior Number Code Number 9140-0453 INDUCTOR RF-CH-MLD 6.8UH +-5% .166D-INX. 2422E 9140-0399 INDUCTOR RF-CH-MLD 2.2UH +-5% .166D-INX. 24226 9100-3560 INDUCTOR RF-CH-MLD 5.6UH +-5% .166D-INX. 2422E 9100-3560 INDUCTOR RF-CH-MLD 5.6UH +-5% .166D-INX.
  • Page 511 HP Part Number 85662-60184 Reference HP Part Mfr Part Description Number Number 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100 1970 0757-0438 RESISTOR 5.11K +-1% .125W TF TC=O+-100 1970 0698-3441 RESISTOR 215 1% .125W TF TC=O+-100 1970 0757-0443 RESISTOR 11K +-1% .125W TF TC=O+-100 1970 RESISTOR 464 1% .125W TF TC=O+-100...
  • Page 512 HP Part Number 85662-60184 Reference HP Part Description Designatior Number Code Number 0757-0279 RESISTOR 3.16K +-I% .125W TF TC=O+-100 1970: 0757-0288 RESISTOR 9.09K +-1% .125W TF TC=O+-100 1970: 0698-3156 RESISTOR 14.7K 1% .125W TF TC=O+-100 19701 0698-3156 RESISTOR 14.7K 1% .125W TF TC=O+-100...
  • Page 513 c 4 3 D I P ’ c 7 3 C 6 5 R 4 9 c 7 4 ‘ C T R R 4 3 C l 9 - L C C T R L C D I P (Option Tab)
  • Page 515 HP Part Number 85662-60186 Reference HP Part C Mfr Part Description Designation Number D w Code Number 85662-60186 BOARD ASSEMBLY, 3 MHZ BANDWIDTH FILTER 28480 85662-60186 OPTION 805-504 Y5V 1032 0160-2055 CAPACITOR-FXD .OlUF +80-20% 1OOVDC CER 52763 0160-2266 CAPACITOR-FXO 24PF +-5% 500VDC CER O+-30...
  • Page 516 HP Part Number 85662-60186 Reference HP Part Mfr Part Description Number Code Number CAPACITOR-FXD .OlUF +80-20X 1OOVDC CER CAP-FXD 3pF 500 V 5276: CAPACITOR-FXD .047UF +80-20% 1ODVDC CER CAPACITOR-FXD 2.2UF+-10% LOVDC TA CAPACITOR-FXD 2.2UF+-10% ZOVDC TA CAPACITOR-FXD 2.2UF+-10% ZOVDC TA CAPACITOR-FXD 2.2UF+-10% POVDC TA...
  • Page 517 HP Part Number 85662-60186 Mfr Part Description Code Number 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 30V 5OMA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35 71468 1901-0040 DIODE-SWITCHING 30V 50MA 2NS DO-35...
  • Page 518 HP Part Number 85662-60186 Reference HP Part Mfr Part Description Designatior Code Number 9170-0029 CORE-SHIELDING BEAD 9170-0029 CORE-SHIELDING BEAD 9170-0029 CORE-SHIELDING BEAD 9170-0029 CORE-SHIELDING BEAD 02114 9170-0029 CORE-SHIELDING BEAD 02114 9100-1643 INDUCTOR RF-CH-MLD 300UH +-5% .2D-INX.4! 9980C 2500-02 9100-1648 INDUCTOR RF-CH-MLD 560UH +-5% .2D-INX.4!
  • Page 519 HP Part Number 85662-60186 Reference HP Part Mfr Part Description Designation Number Code Number TRANSISTOR PNP SI TO-18 PD=360MW 1853-0034 04713 TRANSISTOR J-FET N-CHAN D-MODE SI 1855-0081 34677 TRANSISTOR NPN SI TO-la PD=360MW 1854-0023 25403 1854-0882 TRANSISTOR NPN PD=300MW FT=200MHZ...
  • Page 520 HP Part Number 8666240186 HP Part Reference Mfr Part Description Designatior Number Code Number 0757-0401 RESISTOR 100 +-1% .125W TF TC=O+-100 19701 0698-3447 RESISTOR 422 1% .125W TF TC=O+-100 19701 0757-0420 RESISTOR 750 +-1% .125W TF TC=O+-100 19701 0757-0290 RESISTOR 6.19K +-1% .125W TF TC=O+-100...
  • Page 521 Reference HP Part Mfr Part Description Number Code Number 0757-0394 19701 RESISTOR 51.1 +-1% .125W TF TC=O+-100 0698-3443 RESISTOR 287 1% .125W TF TC=O+-100 19701 0757-0402 19701 RESISTOR 110 +-1% .125W TF TC=O+-100 0698-0082 19701 RESISTOR 464 1% .125W TF TC=O+-100...
  • Page 522 AMPL AMPL (Option 46.2 Tab)
  • Page 524 HP Part Number 85662-60185 Reference HP Part Mfr Part Description Designation Number Code Number BOARD ASSEMBLY, ATTENUATOR-BANDWIDTH 28481 85662-60185 ER ( 462) FILT TION (SERIAL PREFIX: 2542A) 0140-0200 CAPACITOR-FXD 390PF +-5% 300VDC MICA 0902: 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0422;...
  • Page 525 HP Part Number 85662.60185 Reference HP Part Mfr Part Description Designatior Number Code Number 0160-0437 CAP-FXD 12pF 500 V CAPACITOR-FXD 220PF +-5% 300VDC MICA O+: 0160-0134 0902: 0160-4574 CAPACITOR-FXD 1OOOPF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 526 HP Part Number 85662-60185 Reference HP Part Description Designatior Number Code Number 1901-1070 DIODE-PIN 1lOV DIODE-SCHOTTKY SM SIG 1901-0535 1901-0047 DIODE-SWITCHING 20V 75MA 1ONS DO-35 DIODE-SCHOTTKY SM SIG 1901-0535 1901-1070 DIODE-PIN 1lOV 1901-1070 DIODE-PIN 1lOV 1901-0535 DIODE-SCHDTTKY SM SIG 9170-0029...
  • Page 527 Reference HP Part Mfr Part Description C o d e Designatior Number Number COVER, ATTENUATOR-BANDWIDTH FILTER 28481 85662-20038 2190-0401 WASHER-FL NM NO. 4 .lE-IN-ID .312-IN-00 1470 1200-0081 INSULATOR-FLG-BSHG NYLON 974 307 1200-0081 INSULATOR-FLG-BSHG NYLON 974 307 1200-0081 INSULATOR-FLG-BSHG NYLON 974 307...
  • Page 528 Reference HP Part Mfr Part Description Designation Number Number Code 0698-3156 RESISTOR 14.7K 1% .125W TF TC=O+-100 19701 0698-3156 RESISTOR 14.7K 1% .125W TF TC=O+-100 19701 0757-0280 RESISTOR 1K +-1% .125W TF TC=O+-100 19701 SEE SCHEMATIC FUNCTION BLOCK J RESISTOR-TRMR 1M 20% TKF SIDE-ADJ 17-TRN...
  • Page 529 Reference HP Part Mfr Part Description Designatior Number Code Number CRYSTAL, QUARTZ, PART OF A MATCHED SET OF SIX, INCLUDES A4A4Yl-3, A4A6AlY1, ANC CRYSTAL, QUARTZ, PART OF A MATCHED SET OF SIX, INCLUDES A4A4Yl-3, A4A6AlY1, AND *Indicates factoyselected value 8566240185 Parts List...
  • Page 530 S Y M R 4 0 X T A L C 4 2 R 4 4 L C D I P C 4 6 L C C T R (Option 462 Tab)
  • Page 532 HP Part Number 85662-60187 Mfr Part Reference HP Part Description Number Code Number Designation 85662-60187 ASSE Y, IF 28480 85662-60187 BOARD CONTROL (SERIAL PREFIX: 2542A-2813A) 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0180-0197 CAP-FXD 2.2uF 20 V TA 56289 0160-4832 CAPACITOR-FXD .OlUF +-10x 1OOVDC CER...
  • Page 533 Reference HP Part Mfr Part Description Designatior Number Code Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 2OOMA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING BOV 200MA 2NS DO-35...
  • Page 534 HP Part Number 85662-60187 Reference HP Part Mfr Part Description Designation Number Number Code 0698-3161 RESISTOR 38.31: 1% .125U TF TC=O+-100 CRB14 OR CR825 0757-0462 RESISTOR 75K +-1% .125W TF TC=O+-100 CRB14 OR CRB25 0757-0464 RESISTOR 90.9K +-1% .125W TF TC=O+-100 CRB14 OR CR825 RESISTOR 750K +-1% .125W TF TC=O+-100...
  • Page 535 HP Part Number 85662-60187 Reference HP Part Mfr Part Description Number Code Number IC FF TTL LS D-TYPE POS-EDGE-TRIG COM CL 1820-0471 IC INV TTL HEX I-INP 0129t IC FF TTL LS D-TYPE PDS-EDGE-TRIG COM CL IC DRVR TTL LS LINE DRVR OCTL 01295 NETWORK-RES lo-SIP lO.OK OHM X 9...
  • Page 536 HP Part Number 85662-602-I 1 Mfr Part HP Part C Reference Description C o d e Designation Number D Qty Number 85662-60211 ASSE 28480 85662-60211 BOARD MBLY : 2813~-2816~) RIAL PREFIXES 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 537 HP Part Number 85662-60211 Reference HP Part Description Number Number 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 0757-0289 RESISTOR 13.3K +-1% .125W TF TC=O+-100...
  • Page 538 HP Part Number 85662-60211 Reference HP Part Mfr Part Description Designatior Number Code Number 0698-3450 RESISTOR 42.21: 1% .125W TF TC=O+-100 19701 0698-8824 RESISTOR 5621: +-1% .125W TF TC=O+-100 19701 2100-3103 RESISTOR-TRMR 10K 10% TKF SIDE-ADJ 17-TF 2100-3054 RESISTOR-TRMR 50K 10% TKF SIDE-ADJ 17-TF...
  • Page 539 HP Part Number 85662-60211 Reference HP Part Part Description Designatior Number Number 1810-0280 NETWORK-RES IO-SIP lO.OK OHM X 9 9163' 1902-3203 DIODE-ZNR 14.7V 5% DO-35 PD=.4W 0471: 1902-0041 DIODE-ZNR 5.11V 5% DO-35 PD=.4W 0471: 8159-0005 RESISTOR-ZERO OHMS 22 AWG LEAD DIA...
  • Page 540 HP Part Number 85662-60223 Part Description Code Number 85662-60223 SSEM 28480 85662-60223 BOARD A IF CON (SERIAL PREFIX: 2848A) 0160-4832 CAPACITOR-FXD .OlUF +-10x 1OOVDC CER 04222 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 0160-4832 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER 04222 0160-4832 CAPACITOR-FXD .OlUF +-lo% 1OOVDC CER...
  • Page 541 HP Part Number 85662-60223 Reference Mfr Part Description Designation Number D Qty Code Number 1901-0050 DIODE-SWITCHING 80V 2OOMA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 IN4150 1901-0050 DIODE-SWITCHING 80V 200MA 2NS DO-35 1901-0050...
  • Page 542 HP Part Reference Mfr Part Description Designation Number Code Number 0757-0466 RESISTOR IlOK +-1X .125W TF TC=O+-100 19701 0698-3457 RESISTOR 316K 1% .125W TF TC=O+-100 19701 0698-3458 RESISTOR 3481: 1% .125W TF TC=O+-100 19701 0698-3161 RESISTOR 38.31: 1% .125W TF TC=O+-100...
  • Page 543 HP Part Number 85662-60223 Reference HP Part Mfr Part Description Designatior Number Number 1826-0990 0471: 1820-0468 IC DCDR TTL BCD-TO-DEC 4-TO-IO-LINE 4-I) 1858-0076 TRANSISTOR ARRAY 14-PIN PLSTC TO-116 0471: 1858-0076 TRANSISTOR ARRAY 14-PIN PLSTC TO-116 0471: 1810-0277 NETWORK-RES IO-SIP 2.2K OHM X 9 9163;...
  • Page 544 R 6 6 3 kHz R 6 5 R 6 2 1 M H z 3 M H z U 1 6 (Option 462 Tab)
  • Page 545 R 6 6 3 kHz R 6 5 R 6 2 1 M H z 3 M H z (Option 462 Tab)
  • Page 546 S E E E X P L O D E D u 1 4 V I E W S I t - l 1 5 4 I l J 16 cl C R 1 6 I l - I 1 9 d c 2 2 + (Option 462 Tab)
  • Page 547 E X P L O D E D V I E W S C R 2 R 6 5 C R 3 R T 2 R T 3 C R 4 R 6 2 3 0 0 kHz 1 M H z C R 5 R I O C R 6...

  • Page 551: Ordering Information

    6. The manufacturer part number. Ordering Information To order a part listed in the general parts table, quote the HP part number, include the check digit, and indicate the quantity required. Address and mail the order to the Hewlett-Packard Sales and Service Office nearest you. The check digit ensures accurate and timely processing of your order.
  • Page 552 Direct Mail-Order System Within the USA, Hewlett-Packard can supply parts through direct mail-order system. Advantages of using the system are as follows: 1. Direct ordering and shipment from the Hewlett-Packard Parts Center in Mountain View, California. 2. No maximum or minimum quantity requirement on any mail order. (There is a minimum-order quantity imposed on orders made through the Hewlett-Packard Sales and Service Offices when the orders require billing and invoicing.) 3.
  • Page 553 Table 1. Reference Designations, Abbreviations, and Multipliers (1 of 4) REFERENCE DESIGNATIONS Assembly Thermistor Attenuator, Isolator, Filter Switch Limiter, Termination Circulator Transformer Fan, Motor Electrical Connector TB Terminal Board Battery (Stationary Portion), TC Thermocouple Capacitor Jack Test Point Coupler Relay Integrated Circuit, Diode, Diode Coil, Inductor...
  • Page 554 Table 1. Reference Designations, Abbreviations, and Multipliers (2 of 4) ABBREVIATIONS DAP-GL Diallyl Phthalate Current Gain JFET Junction Field Glass Bandwidth Product Effect Transistor Double (Transition Decoder DCDR Frequency), Feet, Degree Foot D-HOLE D-Shaped Hole FXD Fixed Kelvin, Key, Diameter Kilo, Potassium Dual In-Line Packagl KNRLD Knurled...
  • Page 555 Table 1. Reference Designations, Abbreviations, and Multipliers (3 of 4) ABBREVIATIONS PLSTC Plastic Subminiature, Panel A Type (Threaded Nano, None Positive Negative Connector) N-CHAN N-Channel Positive (Transistor Subminiature, Nanohenry POLYC Polycarbonate B Type (Slip-on Nanometer, POLYE Polyester Connector) Nonmetallic Potentiometer Submi niature, Normally Open, Pozidriv Recess...
  • Page 556 Table 1. Reference Designations, Abbreviations, and Multipliers (4 of 4) ABBREVIATIONS VAR Variable VDC Volts-Direct Current Microcandela Microfarad Garnet Microhenry Microliter, Underwriters’ Watt, Wattage, Laboratories, Inc. White, Wide, Width LJNHDND Unhardened W/SW With Switch ZNR Zener WW Wire Wound Variable, Violet, Volt, Voltage By (Used with Vacuum, Volts-...
  • Page 557 Table 2. Manufacturers Code List Manufacturer Name Address Codr 00032 NEC ELECTRONICS INC MTN VIEW, CA 9404: LEXINGTON, MA 0217: 0007: ARIZONA COIL INC 85621 0027: STILLWATER MFG CO EAST FREEDOM, MA MCCOY ELECTRONICS CO HOLLY SPRINGS, PA EXAR INTEGRATED SYSTEMS INC SUNNYVALE, CA NORELCO NORTH AMER PHILIPS LTG CORF LOS ANGELES, CA...
  • Page 558 NYLOGRIP PRODUCTS 0215 ITW FASTEX DES PLAINES, IL ELPAC INC COMPONENTS DIV IRVINE, CA 9266 0194: HP DIV 04 SPD CABLES 64 PALO ALTO, CA 943a 0195: HP DIV 04 SPD MOLDING 91 PALO ALTO, CA 943a 0197: GE CO SEMICONDUCTOR PROD DEPT...
  • Page 559 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Country ZIP Code Codr 02465 ANILLO INDUSTRIES INC ORANGE, CA 92667 02483 CTS CORP 46514 02484 CTS CORP PASO ROBLES PASO ROBLES, CA 02499 IRC INO BOONE, NC 28607 02501 TELEDYNE INDUSTRIES INC LOS ANGELES, CA 90067 02556 MONTROSE PRODUCTS CO...
  • Page 560 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Country ZIF Code 02928 VISHAY INTERTECHNOLOGY INC MALVERN, PA 1935 02937 VOLTRONICS CORP HANOVER, NJ 0793 02946 DUPONT E I DE NEMOURS & CO WILMINGTON, DE 1986 02995 MEPCO/CENTRALAB INC RIVIERA, FL 03038 INTL RECTIFIER CORP LOS ANGELES, CA 03122 EMCON DIV ITW...
  • Page 561 Table 2. Manufacturers Code List (continued) Address Country ZIP Code 03714 INTERSIL INC CUPERTINO, CA 95014 03724 BIVAR INC SANTA ANA, CA 92705 03740 ERIE TECH PROD INC ERIE FREQ CONT CARLISLE, PA 03744 BOURNS INC RIVERSIDE, CA 9250 03746 SPECTRUM CONTROL INC ERIE, PA 1650 D3747 COLORADO CRYSTAL CORP...
  • Page 562 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Country ZIP Code 04522 ELECTRO MOTIVE CORP FLORENCE, SC 0622 04550 GENERAL ELECTRIC CO FAIRFIELD, CT 0643 04563 ERIE TECHNOLOGICAL PRODUCTS INC ERIE, PA 1651 04564 ESSEX INTERNATIONAL INC FORT WAYNE, IN 04567 ITT HARPER DIV CHICAGO, IL 60601...
  • Page 563 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Z I P 0544 BERGQUIST CO MINNEAPOLIS, MN 0545. ICO-RALLY CORP SUNNYVALE, CA 9430: 0546 ITT HARPER INC MORTON GROVE, IL 6005: FARMINGTON, CT 0603: 0550 MILLER DIAL & NAMEPLATE CO EL MONTE, CA AUGAT INC MANSFIELD, MA...
  • Page 564 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Country ZIP Code 06337 PHILLIPS GLOEILAMPENFABRIEKEN N V EINDHOVEN 96344 FUJITSU MICROELECTRONICS INC SANTA CLARA, CA 9505 SUNNYVALE, CA 9408 06352 TDK CORPORATION OF AMERICA SKOKIE, IL 06354 TOSHIBA CORP TOKYO 06424 ESIL COMPONENTS LTD SUNDERLAND 06501 BARBER &...
  • Page 565 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Country ZIP Code 09126 ASJ PTE LTD JURONG TOWN 99171 RHOMBUS INDUSTRIES INC HUNTINGTON BEACH, CA 09226 NEC ELECTRONICS INC SANTA CLARA, CA 09235 FOX ELECTRONICS FT MEYERS, FL 3391c 09283 TOPAZ SEMICONDUCTOR SAN JOSE, CA 95132 09441 APPLIED ENGINEERING PRODUCT CO...
  • Page 566 Table 2. Manufacturers Code List (continued) Manufacturer Name Address Code 11345 CYPRESS SEMICONDUCTOR CORP SAN JOSE, CA 95134 1135 BRISTOL ROYAL WORKSHOP BLIND BRISTOL 1141 ISOLANTITE MFG COMPANY INC STIRLING, NJ 1142 KYOCERA CORPORATION KYOTO 1159 MICRO-COAX COMPONENTS, INC COLLEGEVILLE, PA 1167 SARONM PALO ALTO, CA...
  • Page 567 CABLE CABLE PLUG CABLE FDR USE PLUG TYPE * HP PART DESCRIPTION LENGTH COLOR IN COUNTRY NUMBER I N C H E S M i n t G r a y G r e a t B r i t a i n ,...
  • Page 568 Table 4. IF-Display Section, Major Assemblies HP Part Description Designato Number Code Number 85662-60001 BOARD ASSEMBLY,KEYBOARD 28480 856626000: BOARD ASSEMBLY, Z AXIS AMPLIFIER (SERIAL 28480 NUMBER PREFIXES: 2403A-3OOlA) 85662-60236 BOARD ASSEMBLY, XYZ DRIVER AMPLIFIER 28480 85662-60059 BOARD ASSEMBLY, HIGH VOLTAGE REGULATOR...
  • Page 569 Table 4. IF-Display Section, Major Assemblies (continued) HP Part Description Mfr Part Designato Number Number 856626024: BOARD ASSEMBLY, INTENSITY CONTROL (SERIAL 28480 NUMBER PREFIXES: 3004A AND ABOVE) BOARD ASSEMBLY, LINE GENERATOR 28480 856626012: BOARD ASSEMBLY, MEMORY 28480 656626012: 8566260141 BOARD ASSEMBLY, DATA MANIPULATOR...
  • Page 570 Table 4. IF-Display Section, Major Assemblies (continued) HP Part Description Mfr Part Designato Number Number BOARD ASSEMBLY, STEP GAIN (OPTION 067) 85662-6017: 85662-6001 ASSEMBLY, DOWN/UP CONVERTER (INCLUDES CONVERTER) 85662-6017 7 ASSEMBLY, OUTPUT DRIVER/INPUT BUFFER 2848C 85662-6017; (OPTION 067)(INCLUDES A4A6Al INPUT BUFFER...
  • Page 571 Table 4. IF-Display Section, Major Assemblies (continued) HP Part Description Mfr Part Reference Number Number BOARD ASSEMBLY, IF CONTROL (OPTION 462) 28480 85662-60187 (SERIAL NUMBER PREFMES: 2542A-2813A) BOARD ASSEMBLY, IF CONTROL (OPTION 067) 28480 (SERIAL NUMBER PREFIXES: 2813A-2816A) BOARD ASSEMBLY, IF CONTROL (OPTION H96)
  • Page 572 Table 5. IF-Display Section Cables HP Part Description Mfr Part Designato Number Number CABLE ASSEMBLY, AlAl TO AlAlO (RIBBON CABLE) CABLE ASSEMBLY, A3AlO TO AlAlO (RIBBON CABLE. PART OF A3 INTERCONNECT) 85662-6006: CABLE ASSEMBLY, AlAlO TO A3AlO (A3 POWER) 85662-6006:...
  • Page 573 Table 5. IF-Display Section Cables (continued) Description Mfr Part HP Part Reference Number Designator Number 2848C 85662-6002s 856626002 CABLE ASSEMBLY, COAX 1, A3AlO TO AlAlO (X DEFLECTION) 28480 85662-60038 856626003 CABLE ASSEMBLY COAX 1, A3AlO TO AlAlO (Y DEFLECTION) 856626003...
  • Page 574 Table 6. RF Section Miscellaneous Parts HP Part Description Mfr Part Designato Number Number 9100-4009 TRANSFORMER 85662-6024 CRT - P31 PHOSPER COATING (SERIAL NUMBER PREFIXES: 2403A-3001A) 2090-0225 CRT (SERIAL NUMBER PREFIXES 3004A AND 2090-0225 ABOVE) 4320-0311 CRT SHOCK MOUNT 2848C...
  • Page 575 Table 6. RF Section Miscellaneous Parts (continued) M f r M f r Pari Reference HP Part CD Qty Description Designator Number Code Number PART OF AlASSEE AlA9J2 PART OF W28 (DISPLAY OUTPUT X) PART OF W29 (DISPLAY OUTPUT Y)
  • Page 576 P L A C E S ) N O T E : F O R I F / R F S E C T I O N I N T E R C O N N E C T C A B L E S (W3O,W31), S E E T A B L E 4 . Figure 1.
  • Page 577 Item H P P a r t C D Description Mfr Part Number C o d e N u m b e r FRONT DRESS PANEL, STANDARD 28480 856620009 85662-00098 FRONT DRESS PANEL, OPTION H96 28480 856620009 85662-00099 FRONT DRESS PANEL, OPTION 067 28480 856620009 FRONT DRESS PANEL, OPTION 462 28480 856620010...
  • Page 578 Figure 2. IF-Display Section Parts Identification (1 of 2) 28 General Parts Listing...
  • Page 579 Item HP Part CD Description Mfr Mfr Par Number C o d e Number PERFORATED SIDE COVER * 28480 50623812 PERFORATED SIDE COVER ** 28480 506@9912 5062-3837 PERFORATED SIDE COVER * 28480 50623837 5060-9937 PERFORATED SIDE COVER ** 28480 5060-9937...
  • Page 580 ( 3 P L A C E S ) ( 2 P L A C E S ) ( 2 P L 4 P L A C E S ) BENEATH COVER) ( 3 P L A C E S ) Figure 3.
  • Page 581 HP Part Description Mfr Part Number Number 856622004: COVER, A4Al ASSEMBLY COVER, A4A2 ASSEMBLY 856622003: COVER, A4A3 ASSEMBLY 85662-2003 7 856622015: COVER, A4A4 ASSEMBLY 85662-2015: 3 COVER, A4A5 ASSEMBLY 85662-200X COVER, A4A6 ASSEMBLY 8566220034 COVER, A4A7 ASSEMBLY, STANDARD 8566220161 COVER, A4A7, BLANK, OPTION 067...
  • Page 582 This page intentionally left blank. 32 General Parts Listing...
  • Page 583 I t e m H P P a r t C D Description Mfr Part Number C o d e N u m b e r 85662-20092 IF HOUSING CASTING 28480 856622009 85662-00046 PC BOARD BRACKET 28480 85662-0004 85662-60099 DIGITAL STORAGE SHIELD ASSEMBLY (BENEATH 28480 856626009 COVER (9)) 8566200041...
  • Page 584 ( 3 P L A C E S ) ( 2 P L PLAC P L A C 4 P L A C E S ) C O V E R ) ( 3 P L A C E S ) Item H P P a r t C D Description...
  • Page 585 I t e m H P P a r t C D Description Mfr Part Number C o d e N u m b e r 28480 856622003; COVER, A4A8 ASSEMBLY 85662-00075 28480 856620007< COVER, DIGITAL STORAGE 85662-00036 COVER, HV SUPPLY 28480 85662-OOOB 28480 856620010;...
  • Page 586 ‘ L A C E S ) P L A C E S ) ( 2 P & E S ) HP Part Description Mfr Part Number C o d e N u m b e r 856622016~ REAR FRAME...
  • Page 587 Item HP Part Description Mfr Pari Number Number 3050-0227 28481 WASHER, FLAT .149ID 6 3050-0227 NOT USED SHIELD, CRT, REAR 28481 85662-0007 2200-0103 SCREW, 440, .25-IN-LG PAN HD 28481 2200-0103 0515-1331 SCREW, M4 X 6 FLAT HD * 0515-1331 SCREW, 8-32.15 IN-LG 100 DEG FLAT HD **...
  • Page 588 P L A C E S ) AlAlR8 Figure 6. IF-Display Section Parts Identification, Front Panel View (1 of 2) 36 General Parts Listing...
  • Page 589 Mfr Part Description Item HP Part C o d e N u m b e r Number 28480 50410690 5041-0690 28480 50410688 50410688 KEY &LEAR-WRITE) 28480 5041-0807 5041-0807 KEY (BLANK_) 28480 50410689 5041-0689 28480 5041-0732 5041-0732 28480 50410693 5041-0693 28480 50410696...
  • Page 590 Major Assembly and Component Locations The major assemblies and components of the IF-Display section are identified in this chapter. Figure 1 and Figure 2 show the front and bottom views of the IF-Display section, respectively. Figure 3 shows the top view of the IF-Display section for instruments with serial number prefixes from 2403A through 3001A.
  • Page 591 W 2 3 W 2 5 W 2 6 W 2 7 W 2 4 Figure 2. Major Assembly and Component Locations, Bottom View 2 Major Assembly and Component Locations...
  • Page 592 A l ” f - d - M u - , W6 - ‘II Figure 3. Major Assembly and Component Locations, Top View (Serial Number Prefixes: 2403A to 3001A) Major Assembly and Component Locations 3...
  • Page 593 F L 1 Figure 4. Major Assembly and Component Locations, Top View (Serial Number Prefixes: 3004A and Above) 4 Major Assembly and Component Locations...
  • Page 594 HEWLETT PACKARD HP Part No. 85662-90085 Printed in USA...

Table of Contents