HP 3478A Technical Manual page 9

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