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

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