Filter
Top Products
317
FREQ
ACC
Main coil coarse DAC at limit. The main coil coarse DAC is set to
bring YTO ERR close enough to 0 volts for the main coil fine DAC to
bring YTO ERR to exactly 0 volts. ERR 317 is set if the main coil
coarse DAC is set to one of its limits before bringing YTO ERR close
enough to 0 volts.
318
FREQ
ACC
319 WARN COA
320 WARN FIN
Main coil fine DAC at limit. The main coil fine DAC is set to bring
YTO ERR to 0 volts after the main coil coarse DAC has brought
YTO ERR close to 0 volts. ERR 318 is set if the main coil fine DAC
is set to one of its limits before bringing YTO ERR to 0 volts.
YTO coarse tune DAC near limit.
YTO fine tune DAC near limit.
Roller Oscillator Errors (321 to 329)
321
FREQ
ACC
322
FREQ
ACC
324
FREQ
ACC
These errors indicate a faulty roller oscillator on the Al4 frequency
control assembly. The A3 interface ADC circuits may also be faulty.
If error codes 333 and 499 are also present, suspect the 10 MHz
reference, the A21 OCXO, or 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.
Main roller tuning sensitivity is not greater than 0. The MAINSENSE
voltage is noted in a locked condition and the main roller is
programmed to a frequency 400 kHz higher. ERR 321 is set if the new
MAINSENSE voltage is not greater than the previous MAINSENSE
voltage. This error is not applicable to HP 8560 E-Series spectrum
analyzers. If it occurs in an HP 8560 E-Series spectrum analyzer,
suspect a problem with the model number identification in the
spectrum analyzer firmware.
Main roller pretune DAC value set greater than 255. During the
LO adjust sequence, the main roller is locked and then programmed
to a frequency 1.6 MHz higher. A new pretune DAC value is
calculated based upon the main roller tuning sensitivity. ERR 322
is set if this calculated value is greater than 255. This error is not
applicable to HP 8560 E-Series spectrum analyzers. If it occurs in
an HP 8560 E-Series spectrum analyzer, suspect a problem with the
model number identification in the spectrum analyzer firmware.
Unable to adjust MAINSENSE close to 0 volts using the coarse adjust
DAC. The coarse adjust and fine adjust DAC are used together to set
MAINSENSE to 0 volts with the loop opened. ERR 324 is set if the
coarse adjust DAC cannot bring MAINSENSE close enough to 0 volts
for the fine adjust DACs to bring MAINSENSE to exactly 0 volts.
This error is not applicable to HP 8560 E-Series spectrum analyzers.
If it occurs in an HP 8560 E-Series spectrum analyzer, suspect a
problem with the model number identification in the spectrum
analyzer firmware.
7-24 General Troubleshooting