4-4
Post-Repair Procedures
Post-Repair Procedures Matrix
Table 4-3 Adjustments: Assemblies A27—A35, AT1, B1, and RF Output Connector
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
AT1 115 dB Attenuator
B1 Fan
RF Output Connector
ADC Calibration
YIG-Driver Pre-Tune Calibration
✓
VCO Bias Frac-N Calibration
Internal Source Calibration
AM Audio Path Offset Calibration
KV vs. Frequency Calibration
Timebase Calibration
FM Scale Offset Calibration
✓
FM Path Offset Calibration
✓
FM In-band Offset Calibration
✓
FM Inverting Amplifier Offset Calibration
FM 1/2 Path Ratio Gain Calibration
✓
Mod Source Relative Gain Calibration
✓
FM/PM Out-of-Band Calibration
FM/PM YO Frequency Compensation Calibration
✓
DC FM Calibration
✓
Low Frequency Output Calibration
External Input Peak Detector Calibration
✓
ALC Dynamic Calibration
✓
Power Flatness Calibration
✓✓✓✓
Attenuator Calibration
✓
ALC Modulator Calibration
✓✓
AM Gain Calibration
✓
LB Digital Prelevel Gain Calibration
LB Digital Mixer Bias Calibration
LB Digital Gain Calibration
Gain Adjustment Bypass Calibration (Frequencies ≤3.2 GHz)
IQ 20 Prelevel Gain Mixer Bias, & Digital Gain Calibration
✓
IQ Impairment Calibration
✓
Pulse Width Calibration
✓
IQ Power Floor Calibration
✓
Target IQ Power Calibration
✓
1/f Corner Calibration
✓