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Chapter 4 Calibration Procedures (continued)
Calibration Security Code 64
Calibration Count 66
Calibration Message 66
General Calibration/Adjustment Procedure 67
Aborting a Calibration in Progress 69
Frequency and Burst Rate Adjustment 69
Function Gain and Linearity Adjustment 70
AC Amplitude Adjustment (High-Z) 70
Modulation Adjustment 72
AC Amplitude Adjustment (50
W) 73
DC Output Adjustment 76
Duty Cycle Adjustment 77
AC Amplitude Flatness Adjustment 77
Output Amplifier Adjustment (Optional) 80
Error Messages 81
Chapter 5 Theory of Operation
Block Diagram Overview 85
Output Attenuator 86
Output Amplifier 87
AM Modulation 89
Pre-attenuator 90
Square Wave and Sync 90
Filters 92
Waveform DAC/Amplitude Leveling/Waveform RAM 93
Direct Digital Synthesis (DDS ASIC) 95
System DACs 96
Floating Logic 97
Earth-Referenced Logic 98
Power Supplies 98
Display and Keyboard 100
Contents
Contents
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