E8257D/67D, E8663D PSG Signal Generators Service Guide
Post–Repair Procedures
Post–Repair Procedures Matrix
4-3
AM Gain Calibration
✓ ✓ ✓ ✓
IQ Impairment Calibration
✓
Power Clamp
✓
Pulse Width Calibration
✓ ✓ ✓ ✓
9V PTAT Abus Calibration
✓
Table 4-2 Post Repair Adjustments: Assemblies A13—A26 (For Prefixes < xx4928)
Adjustments Replaced Assembly
The following adjustments are listed in the order that
they should be performed for proper calibration.
A13 IQ Multiplexer
A14 Baseband Generator
A17 Baseband Generator Interface
A18 CPU
A19 Power Supply
A20 SMI [Source Module Interface]
A21 Rear Panel
A22 Line Module
A23 Lowband Coupler/Detector
A24 20 GHz Coupler
A24 40 GHz Coupler
A24 67 GHz Coupler
A25 20 GHz Detector
A25 40 GHz Detector
A25 67 GHz Detector
A25B Detector Bias Board
A26 MID
ADC 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
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
Lowband Digital Prelevel Gain Calibration
✓
VBLO Mixer Bias Calibration
✓
LB Digital Gain Calibration
✓
Low Band Power Flatness Calibration
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
High Band Power Flatness Calibration
✓ ✓ ✓ ✓ ✓ ✓ ✓ ✓
V- Band Power Flatness Calibration
✓ ✓
IQ Power Floor Calibration
✓
Low Band IQ Power Floor Calibration
✓
IQ Impairment Calibration
✓ ✓ ✓
Table 4-1 Post Repair Adjustments: Assemblies A1—A12 (For Prefixes < xx4928)
Adjustments Replaced Assembly
The following adjustments are listed in the order that they should
be performed for proper calibration.
A1 Keyboard
A2 Display
A2DS1 Display Backlight
A3 Power Switch
A4 Inverter
A5 Sampler
A6 Frac- N
A7 Reference (Standard)
A7 Reference (Option UNR/UNX)
A8 Output (Analog)
A8 Output (Digital)
A9 YIG Driver
A10 ALC
A11 Pulse/Analog Mod Gen
A12 Low Band Fast Pulse
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