304 Chapter6
General Troubleshooting
System Analyzer Programming Errors (100 to 150)
an HP 8560 E-series or EC-series spectrum analyzer,
suspect a problem with the model number
identification in the spectrum analyzer firmware.
306 FREQ ACC 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 or EC-series spectrum
analyzers. If it occurs in an HP 8560 E-series or
EC-series spectrum analyzer, suspect a problem with
the model number identification in the spectrum
analyzer firmware.
307 FREQ ACC Transfer oscillator pretuned DAC out of range. The
transfer oscillator pretune procedure attempts to find
pretuned DAC values by programming the PLL to 25
different frequencies and incrementing the transfer
oscillator pretune DAC until XFRSENSE changes
polarity. ERR 307 is set if the DAC is set to 255
(maximum) before XFRSENSE changes polarity. This
error is not applicable to HP 8560 E-series or EC-series
spectrum analyzers. If it occurs in an HP 8560 E-series
or EC-series spectrum analyzer, suspect a problem with
the model number identification in the spectrum
analyzer firmware.
308 FREQ ACC Offset oscillator pretune DAC not within prescribed
limits at low frequency. The offset oscillator pretune
DAC is set to provide a frequency less than 189 MHz
while the PLL is programmed for 189 MHz. ERR 308 is
set if XFRSENSE is greater than +5 V (it should be at
the negative rail). This error is not applicable to HP
8560 E-series or EC-series spectrum analyzers. If it
occurs in an HP 8560 E-series or EC-series spectrum
analyzer, suspect a problem with the model number
identification in the spectrum analyzer firmware.
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