302 Chapter6
General Troubleshooting
System Analyzer Programming Errors (100 to 150)
204 FADC CAL Binary search failed during FADC log expand offset
calibration.
This error applies only to EC-series analyzers and
E-series analyzers with fast ADC (Option 007).
205 FADC CAL Slope derivation failed during FADC linear offset
calibration.
This error applies only to EC-series analyzers and
E-series analyzers with fast ADC (Option 007).
206 FADC CAL Slope derivation failed during FADC log offset
calibration.
This error applies only to EC-series analyzers and
E-series analyzers with fast ADC (Option 007)
207 FADC CAL Slope derivation failed during FADC log expand offset
calibration.
This error applies only to EC-series analyzers and
E-series analyzers with fast ADC (Option 007)
250 OUTOF RG ADC input is outside of ADC range.
251 NO IRQ Microprocessor not receiving interrupt from ADC.
LO and RF Hardware/Firmware Failures (300 to 399)
YTO Loop Errors (300 to 301)
These errors often require troubleshooting the A14
frequency control assembly (synthesizer section) or the
ADC circuits.
300 YTO UNLK YTO (first LO) phase locked loop is unlocked. The ADC
measures YTO_ERR voltage under phase-lock
condition.
301 YTO UNLK YTO (first LO) phase locked loop is unlocked. Same as
ERR 300 except ERR 301 is set if the voltage is outside
certain limits.
Roller PLL Errors (302 to 316)
These errors indicate a faulty roller oscillator on the
A14 frequency control assembly. Refer to Chapter 10.
The A3 interface ADC circuits may also be faulty. If
error codes 333 and 499 are present, suspect the 10
MHz reference, the A21 OCXO, or on the A15 assembly
(Option 103). These errors do not apply to the hardware
in an HP 8560 E-series or EC-series spectrum analyzer.
If they occur in an HP 8560 E-series or EC-series
spectrum analyzer, suspect a problem with the model
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