
ii
RS232
Interface
32
GPIB
Interface
32
Power
Supplies
33
Internal
Oscillator
33
Calibration and Repair
Introduction
34
Multiplier
Adjustments
34
Amplifier and Filter Adjustments
34
CMRR
Adjustment
34
Line Notch Filter Adjustment
35
2xLine
Notch
Filter
Adjustment
35
Repairing Damaged Front-End
35
Appendix A: Noise Sources and Cures
Johnson
Noise
36
'1/f'
Noise
36
Noise
Spectrum
36
Capacitive
Coupling
37
Inductive
Coupling
37
Ground
Loops
38
Microphonics
38
Thermocouple
Effect
38
Appendix B: RS232
Simplest Case Using the RS232
39
Using Control Lines
39
Baud
Rates
39
Stop
Bits
40
Parity
40
Voltage
Levels
40
'Eavesdropping'
40
Appendix C: GPIB
Introduction to the GPIB
41
Bus
Description
41
Appendix D: Program Examples
IBM PC, Microsoft Basic, via RS232
42
IBM PC, Microsoft Fortran, via RS232
43
IBM PC, Microsoft C, via RS232
45
IBM PC, Microsoft Basic, via GPIB
47
HP-85, HP Basic, via HPIB
49
Documentation
Part Numbering and Locations
50
Parts List, Main Assembly
51
Parts List, Internal Oscillator
65
Parts List, Miscellaneous
66
Parts List, Front Panel
67
Schematic
Diagrams
71