1-71
Troubleshooting
Troubleshooting Adjustment Problems
Troubleshooting Adjustment Problems
When an adjustment does not work or fails to resolve a problem and all self–tests have passed, use
the following table to locate the most likely failure.
Table 1-17 Troubleshooting Help for Failed Adjustments
Adjustment that is failing... Assemblies most likely causing failure...
ADC Calibration A18 CPU
YIG
-Driver Pre-Tune Calibration
A9 YIG Driver
A28 YIG Oscillator
A5 Sampler
A6 Frac
-N
VCO Bias Franc-N Calibration A6 Frac-N
Internal Source Calibration A11 Pulse/Analog Modulation Generator
AM Audio Path Offset Calibration A11 Pulse/Analog Modulation Generator
KV vs. Frequency Calibration A6 Frac-N
Timebase Calibration A7 Reference
FM Scale Offset Calibration A11 Pulse/Analog Modulation Generator
FM Path Offset Calibration A11 Pulse/Analog Modulation Generator
A6 Frac-N
FM In-band Offset Calibration A6 Frac-N
FM Inverting Amplifier Offset Calibration A6 Frac-N
FM 1/2 Path Ratio Gain Calibration A11 Pulse/Analog Modulation Generator
Mod Source Relative Gain Calibration A11 Pulse/Analog Modulation Generator
FM/PM Out-of- Band Calibration A6 Frac-N
FM/PM YO Frequency Compensation Calibration A9 YIG Driver
A28 YIG Oscillator
DC FM Calibration A6 Frac-N
A11 Pulse/Analog Modulation Generator
Low Frequency Output Calibration A11 Pulse/Analog Modulation Generator
External Input Peak Detector Calibration A11 Pulse/Analog Modulation Generator
ALC Dynamic Calibration A10 ALC
A30 Modulation Filter
A8 Output
Power Flatness Calibration A10 ALC
RF Path
Attenuator Calibration-Lowband and Highband
Power
AT1
RF Path
Attenuator Calibration-Highband and High
Power
AT1
RF Path
Attenuator Calibration-Lowband and Low Power AT1
RF Path
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