Attenuators And Impedance Selector - HP 654A Operating And Service Manual

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V UT SR PN ML K JH FE DC BA
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r- R35
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.ÇIO 6S3A-B-1689 - RO
- R 1 -
- CI -
-R2-
- R3-
- R 4-
-R5- - R 7-
- RIO - - R6 -
- R8-
- R9 -
- RI3 -
- RII-
-RI2-
--R14--
- R16-
- RI 5 -
- RI 9-
- R17-
- -
- R 21-
- R20-
-
-R22-
R23-
•4
2e
54 A - 8-,784
A4
hp
Part No. 00654-66504
^
ATTENUATOR
S4
hp
Port No. 00654-63401
NOTES
MECHANICAL A4
PIN I
STOP
--F
DC LEVELS WERE OBSERVED UNDER THE FOLLOWING CONDI-
TIONS:
A. 654A.
RANGE - X1OK
DIAL - 1
IMPEDANCE -75 UNBAL
OUTPUT LEVEL-+ 10 dBm
AMPLITUDE- SET FOR 0 ON METER.
B. ALL VOLTAGES +/- 10%.
C. VOLTAGES WERE TAKEN WITH AN - HP- MODEL 3440A
DIGITAL VOLTMETER HAVING A 3443A PLUG-IN. HOWEVER,
ANY DC VOLTMETER WITH APPROXIMATELY 10 MEGOHMS
INPUT IMPEDANCE WILL YIELD ABOUT THE SAME RESULTS.
44
Pm 2
BALANCED
02 '
n
FROM THE
AMPLIFIER C9
4000
FROM THE 0
2
BALANCED
AMPLIFIER CIO
4000
S4 ATTENUATORS
3dB PAD
O
o
o
3dB PAD
IdB STEPS
O
o
2dB PAD IdB PAD
+101
30dB PA D
o
o
o
o
o
o
10dB STEPS
:
20dB PAD 10dB PAD
RI R3 R4 ≥ R6 R7 R9 RIO RI2 RI3 RI5 RI6 RI8 RI9 R21 R22 R24
362.6 362.6 362.6 362.6 5
4
0.9 540.9 1078 1078 66.05 66.05 66.05 66.05 75.78 75
•
78 119
0
3 19.3
30013 PAD 30dB PAD
04 80 04
o o o
O 0 0
0 0
0 0
0 0
o
o
10dB PAD
oi
R25 R27 R28 R30 R3I R33 R34 R36 R37 R39 R40 R42 R43 R45 R46 R48
362.6 362.6 362.6 362.6 540.9 540.9 1078 1078 66.05 66.05 66•05 66.05 75.78 75.78 119.3 19.3
6544-J-17
744
COPYRIGHT 1968 BY HEWLETT-PACKARD COMPANY
o
-J
A 4 IMPEDANCE SELECTOR ( 00654-66504)
P/O SI
RI
61.9
II
2
1
4
*
PF
R6 R7
1473 31.283
Re R9
2I•105 290261
RIO
700832
__--]
P/O SI
-------------------------- -------
Rit
711.'832
RI6
74.663
------------------------
RI7
74.663
R20
239.85
R2I
2008• I
-------
R22
2008.1
R23
239•85
RIB RI9
17.273 36.550
50
UNBAL
3
4
6
1
75
UNBAL
135
BAL
150
BAL
600
BAL
_t
UNBAL
11111
3
Figure 7-4. Attenuators and Impedance Selector
S4, A4.
7-9/7-10