E8257D/67D, E8663D PSG Signal Generators Service Guide
Post–Repair Procedures
Post–Repair Procedures Matrix
4-4
Table 4-3 Post Repair Adjustments: Assemblies A27—A40, AT1, B1, and RF Output Connector (For Prefixes < xx4928)
Adjustments Replaced Assembly
The following adjustments are listed in the order that they should
be performed for proper calibration.
A27 40 GHz Doubler
A28 YIG Oscillator
A29 20 GHz Doubler
A30 Mod Filter
A31 Motherboard
A32 10 MHz Crystal Oscillator
A34 Internal Hard Drive
A35 3 − 20 IQ Modulator
A36 Quadraplier
A37 Up Converter
A38 Lowband Switch Filter
A39 Directional Coupler
A40 Flash Drive
AT1 115 dB Attenuator
B1 Fan
RF Output Connector
ADC Calibration
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
YIG–Driver Pre–Tune Calibration
✓
FM Scale Offset Calibration
✓
FM Path Offset Calibration
✓
FM In–band Offset Calibration
✓
FM 1/2 Path Ratio Gain Calibration
✓
Mod Source Relative Gain Calibration
✓
FM/PM YO Frequency Compensation Calibration
✓
DC FM Calibration
✓
External Input Peak Detector Calibration
✓
I/Q Modulation Calibration
✓
High Band ALC Modulator Calibration
✓
IQ Gain/Offset/Quadrature Calibration
✓
Target IQ Power Calibration
✓ ✓
1/f Corner Calibration
✓
IQ Time Skew RF
✓ ✓
IQ Time Skew Baseband
✓ ✓
ALC Dynamic Calibration
✓ ✓ ✓ ✓
Upconverter Gain Adjustment Calibration
✓
High Band Power Flatness Calibration
✓ ✓ ✓ ✓ ✓
Low Band Power Flatness Calibration
✓ ✓ ✓ ✓ ✓
V- Band Power Flatness Calibration
✓✓✓✓✓
V- Band Low Power Attenuator Accuracy Calibration
✓ ✓
Low Power Attenuator Accuracy Calibration
✓✓
Lowband Filter Offset Calibration
✓
IQ Power Floor Calibration
✓✓
Low Band IQ Power Floor Calibration
ALC Modulator Calibration
✓
ALC Mod Bias DAC Sensitivity Calibration
✓ ✓ ✓
AM Gain Calibration
✓
IQ Impairment Calibration
✓
Pulse Width Calibration
✓
Attentuator Cycle Count Reset (Service Software - Utility)
✓
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