Filter
Top Products
302 OFF UNLK
303 XFR UNLK
304 ROL UNLK
305 FREQ ACC
306 FREQ ACC
Offset roller oscillator PLL is unlocked. May indicate loss of 10 MHz
reference. The 10 MHz reference should measure greater than -7
dBm
at A15J303. The ADC measures
OFFSENSE
at the beginning of each
sweep and, if the voltage is outside certain limits, the offset oscillator
pretuned DAC is adjusted to bring
OFFSENSE
within the proper
range. ERR 302 is set if this cannot be accomplished. 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.
Transfer roller oscillator PLL is unlocked. May indicate loss of
10 MHz reference. The 10 MHz reference should measure greater
than -7
dBm
at A15J303. The ADC measures XFRSENSE at
the beginning of each sweep and, if the voltage is outside certain
limits, the transfer oscillator pretuned DAC is adjusted to bring
XFRSENSE within the proper range. ERR 303 is set if this cannot
be accomplished. 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 oscillator PLL is unlocked. May indicate loss of 10 MHz
reference. The 10 MHz reference should measure greater than -7
dBm
at A15J303. The ADC measures MAINSENSE at the beginning of
each sweep and, if the voltage is outside certain limits, the main roller
pretune DAC is adjusted to bring
OFFSENSE
within the proper
range. ERR 304 is set if this cannot be accomplished. 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 305 is set if the
coarse adjust DAC cannot bring MAINSENSE close enough to 0 volts
for the fine adjust DAC 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.
Unable to adjust MAINSENSE to 0 volts using the fine adjust DAC.
The coarse adjust and fine adjust DAC are used together to set
MAINSENSE to 0 volts with the loop opened. ERR 306 is set if the
fine adjust DAC cannot bring MAINSENSE to 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.
General Troubleshooting 7-21