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202 FADC CAL
203 FADC CAL
Binary search failed during FADC log offset calibration.
This error applies only to spectrum analyzers with fast ADC
(Option 007).
204 FADC CAL
Binary search failed during FADC log expand offset calibration.
This error applies only to spectrum analyzers with fast ADC
(Option 007).
205 FADC CAL
206 FADC CAL
Slope derivation failed during FADC linear offset calibration.
This error applies only to spectrum analyzers with fast ADC
(Option 007).
Slope derivation failed during FADC log offset calibration.
Binary search failed during FADC linear offset calibration.
This error applies only to spectrum analyzers with fast ADC
(Option 007).
207 FADC CAL
250
OUTOF
RG
251 NO IRQ
This error applies only to spectrum analyzers with fast ADC
(Option 007).
Slope derivation failed during FADC log expand offset calibration.
This error applies only to spectrum analyzers with fast ADC
(Option 007).
ADC input is outside of ADC range.
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 Al4 frequency control
assembly (synthesizer section) or the ADC circuits.
300 YTO UNLK
YTO (first LO) ph
ase 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 Al4 frequency
control assembly. Refer to Chapter 11, “Synthesizer Section.” 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 Al5 assembly (Option 103). These errors do not apply to the
hardware in an HP 8560 E-Series spectrum analyzer. If they occur in
an HP 8560 E-Series spectrum analyzer, suspect a problem with the
model number identification in the spectrum analyzer firmware.
7-20
General Troubleshooting