Chapter 6 309
General Troubleshooting
System Analyzer Programming Errors (100 to 150)
be accomplished. 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.
328 FREQ ACC Roller fine adjust DAC sensitivity less than or equal to
0. During the LO adjust routine, the fine adjust DAC is
set to two different values and the MAINSENSE
voltage is measured at each setting. ERR 328 is set if
the difference between these voltages is 0 or negative.
This is typically because the main roller loop is
unlocked. 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.
329 FREQ ACC Roller coarse adjust DAC sensitivity less than or equal
to 0. During the LO adjust routine, the coarse adjust
DAC is set to two different values and the
MAINSENSE voltage is measured at each setting. ERR
329 is set if the difference between these voltages is 0 or
negative. This is typically because the main roller loop
is unlocked. 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.
YTO Loop Error (331)
This error rarely occurs but is usually indicative of a
digital hardware failure.
331 FREQ ACC Invalid YTO frequency. Firmware attempted to set the
YTO to a frequency outside the range of the YTO (2.95
to 6.8107 GHz). Suspect a digital hardware problem,
such as a bad RAM on the A2 controller assembly.
Contact the factory.
600 MHz Reference Loop (333)
This error requires troubleshooting the A14 frequency
control assembly (synthesizer section) or the ADC
circuits.
333 600 UNLK The 600 MHz reference oscillator PLL is unlocked. If
error codes 302, 303, 304, 327 or 499 are also present,
suspect the 10 MHz reference, the A21 OCXO, or the
TCXO on Option 103, or the A15 RF assembly. ERR 333
is set if LO3ERR is outside of its prescribed limits.
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