HP 3478A Technical Manual page 9

Figure Figure
2-1. 2-1. Line Frequency Line Frequency Switch
2-2. 2-2. Line Select Line Select Jumper
2-3. 2-3. Power Cords Power Cords ..................
2-4. 2-4. Typical HP-IB Typical HP-IB System
Interconnection ............................. .. ... . 2-3 Interconnection .............................
2-5. 2-5. HP-IB HP-IB Connecto Connector r ..................
2-6. 2-6. 3478A 3478A Address Address Switch
3-1. 3-1. 3478A Front 3478A Front and
Features ...................................... ....3-2 Features ......................................
3-2. 3-2. Typical Input Typical Input Measurement
Connection .................................... .. ... . 3-3 Connection ....................................
3-3. 3-3. Typical Typical Current Current Measurement
Connection .................................... Connection .................................... .. ... . 3-3
3-4. 3-4. Ohms Ohms Connections Connections ........
3-5. 3-5. Autoranging Autoranging Points
3-6. 3-6. Status Status Byte Byte ................
4-1. 4-1. Ambiguous Ambiguous Regions
4-2. 4-2. DC Volts DC Volts Accuracy
and Calibration .............................. .. ... . 4-6 and Calibration ..............................
4-3. 4-3. DC Common DC Common Mode
4-4. 4-4. DC Current DC Current Accuracy
and Calibration .............................. and Calibration .............................. .. ... . 4-8
4-5. 4-5. AC AC Current Current Accuracy
and Calibration .............................. .. ... . 4-1 and Calibration ..............................
4-6. 4-6. 4-Wire Ohms 4-Wire Ohms Short
4-7. 4-7. 4-Wire Ohms 4-Wire Ohms Connection
5-1. 5-1. 3478A Front 3478A Front Panel
5-2. 5-2. 3478A 3478A Rear Rear Panel
5-3. 5-3. 3478A Bottom 3478A Bottom View
5-4. 5-4. 3478A Left 3478A Left Side
5-5. 5-5. Bottom View Bottom View With
Cover Removed ............................ .. ... . 5-1 Cover Removed ............................
5-6. 5-6. Top View Top View With
Cover Removed............................. Cover Removed............................. .. ... . 5-1
5-7. 5-7. Front Front Panel Panel Bracket
5-8. 5-8. Front Front Panel Panel Assembly
7-A-1 7-A-1. . JM4 JM403 SA Con 03 SA Connec
7-B-1. 7-B-1. JM403 SA JM403 SA Connection
7-C-1 7-C-1. . JM40 JM403 3 SA SA Conne
7-D-1. US01 7-D-1. US01 ALE ALE Signal ........
7-D-2. . Flowch 7-D-2 Flowchart A art A ....
Switch .......... ................ ........ .... .. 2-1
Jumper ........ ................. .............. ..... ... .... . 2-2
................................ .............. ... .... . 2-2
System
......................... ....... ... .... . 2-4
Switch ......... ................. ........... .... . 2-4
and Rear Rear Panel Panel
Measurement
Measurement
................. .............. ..... ... .... . 3-4
Points ........ ................. .............. ..... ... .... . 3-6
................................. ................. ... .... . 3-9
Regions ......... .................... .............. .... . 4-4
Accuracy Test Test
Mode Rejection Rejection Tes Test...4-7
Accuracy Test Test
Accuracy Test Test
Short .................. ...................... .... ....
Connection ......... ............ .......
Panel View View 5-9/5-10 5-9/5-10
Panel View View 5-9/5-10 5-9/5-10
View . . 5-9/5-10 5-9/5-10
Side View View 5-9/5-10 5-9/5-10
With
With
Bracket View View ......... ............. .......5-11
Assembly ........... ................... ...........5-11
nectio tion n ... ...... ...... ...... ..... ..... .......
Connection .......... ................. ...........
Connection ction. ... . ....... ........ ........ ...... .. ... ... 7-C-
Signal ................. .................. ............ ... 7-D-
........ ........ ........ ........ ........ ........ ........ ........ .... ... ... 7-D-
LIST OF ILLUSTRATIONS LIST OF ILLUSTRATIONS
Page Page
Figure Figure
2-1 7-D-3. 7-D-3.
2-2 7-D-4. 7-D-4.
2-2 7-D-5. 7-D-5.
7-D-6. 7-D-6.
2-3 7-D-7. 7-D-7.
2-4
7-F-1. 7-F-1.
2-4
7-F-2. 7-F-2.
....3-2
7-F-3. 7-F-3.
3-3
7-F-4. 7-F-4.
3-3
7-F-5. 7-F-5.
3-4
7-F-6. 7-F-6.
3-6 7-F-7. 7-F-7.
3-9 7-F-8. 7-F-8.
4-4
7-F-9. 7-F-9.
4-6
t...4-7
4-8 7-F-11. 7-F-11.
7-F-12. 7-F-12.
4-10 0 7-F-13. 7-F-13.
....4-11 4-11
....4-11 4-11
7-F-14. 7-F-14.
7-F-15. 7-F-15.
7-F-16. 7-F-16.
7-F-17. 7-F-17.
7-F-18. 7-F-18.
5-11 1
7-F-19. 7-F-19.
7-G-1. 7-G-1.
5-11 1 7-G-2. 7-G-2.
...5-11 7-G-3. 7-G-3.
...5-11
....7-A- 7-A-4 4 7-G-4. 7-G-4.
....7-B-2 7-B-2
7-G-5. 7-G-5.
7-C-4 4
7-D-2 2 7-G-6. 7-G-6.
7-D-3 3 A-1. A-1.
v v
TM 11-6625-3071-14 TM 11-6625-3071-14
Flowchart B B ......... Flowchart .................. .................. .................
Flowchart rt C C .................. Flowcha ..................................
U462 ALE U462 ALE Signal Signal ......... ..................
Flowcha Flowchart rt D D .................. ..................................
JM403 JM403 SA SA Connection...... Connection................
3478A Simplified 3478A Simplified Block Block
Diagram ....................................... Diagram ....................................... ... .... . 7-F
Simplified Schematic Simplified Schematic of of the
Input Switching Circuitry .......... Input Switching Circuitry
Simplified Schematic Simplified Schematic of of the
DC/Ohms Input Amplifier DC/Ohms Inpu t Amplifier .........
Ohms Circuitry Ohms Circuitry Configuration Configuration ........
AC Gain AC Gain Configurations Configurations .........
Dual Slope Dual Slope Conversion Conversion ...........
Simplified Simplified A/D A/D Converter Converter ...........
Integrator Integrator (U401) (U401) Output Output
Slopes ...................................... ....7-F-10 Slopes ......................................
Runup Slopes Runup Slopes
(4 1/2 Digit Model) .......... (4 1/2 Digit Model) ....................
7-F-10. Runup Slopes For Zero Inputs 7-F-10. Runup Slopes For Zero Inputs
4 4 1/2 1/2 Model) Model) ................ .............................. .............. ... ... 7-F-
Slope Slope S S + + 4 4 Generation Generation .........
Slope Slope S S - - 4 4 Generation Generation ...........
Slope S+0 Slope S+0 and and S-0 S-0
Generation ................................ ....7-F-13 Generation ................................
Rundown Slopes Rundown Slopes .......... .....................
Determining the Determining the DAC DAC Setting Setting ....
A/D Hybrid A/D Hybrid (U403) (U403) .......... ....................
3478A Simplified 3478A Simplified Reference Reference
Circuitry ..................................... Circuitry ..................................... ... ... 7-F-
Power-On Power-On Circuitry Circuitry .......... ....................
Reset Reset Circui Circuitry try .................. ...........................
General General Schematic Schematic Notes Notes ..........
3478A 3478A Block Block Diagram Diagram .......... ..................
Input Input Circuitry Circuitry and and
Ohms Current Source Ohms Current Source
AC to to DC AC DC Converter Converter .......... ....................
A/D A/D Converter Converter and and
Control Logic .......... Control Logic ................... ............ ... 7-G-9
Power Power Supplies Supplies ......... ............ ...... ... 7-G-11/7-G-12
Interface Interface Connection Connection and and
Bus Structure............................ Bus Structure............................ .. ... . A-
Page Page
........ ... ... 7-D 7-D-5 -5
................ ... ... 7-D 7-D-6 -6
................. ........ .. ... . 7-D 7-D-8 -8
................ ... ... 7-D 7-D-9 -9
............ .. ...7-D-10 ...7-D-10
7-F-2 -2
the
............... ........ ... 7-F 7-F-4 -4
the
............. ....... ... 7-F 7-F-6 -6
.......... .. 7- 7-F- F-6 6
................ .......... ... 7-F 7-F-8 -8
................. ......... ... 7-F 7-F-9 -9
............ . .. .. 7-F- 7-F-10 10
....7-F-10
............ .. .. .. 7-F-1 7-F-11 1
7-F-12 12
............. ....... ... 7-F- 7-F-12 12
.............. ...... ... 7-F- 7-F-12 12
....7-F-13
............ . ....7-F-13 ....7-F-13
....... ... 7-F-1 7-F-15 5
............ .. .. .. 7-F-1 7-F-15 5
7-F-16 16
............. ...7-F-1 7-F-17 7
......... ... ... 7-F- 7-F-18 18
............ ..... ... 7-G 7-G-1 -1
........... ... 7-G 7-G-3 -3
7-G-5/7-G-6 7-G-5/7-G-6
........... . .. ... . 7-G 7-G-7 -7
7-G-9/7-G /7-G-10 -10
7-G-11/7-G-12
A-2 2