HP 8753E Service Manual page 421

NOT ALLOWED DURING POWER METER CAL
Error Number When the analyzer is performing a power meter calibration, the
198 HP-IB bus is unavailable for other functions such as printing or
plotting.
OVER LOAD ON INPUT A, POWER REDUCED
Error Number See error number 57.
58
OVER LOAD ON INPUT B, POWER REDUCED
Error Number See error number 57.
59
OVER LOAD ON INPUT R, POWER REDUCED
Error Number You have exceeded approximately + 14 dBm at one of the test
57 ports, The RF output power is automatically reduced to
-85 dBm. The annotation PJL appears in the left margin of the
display to indicate that the power trip function has been
activated. When this occurs, reset the power to a lower level,
power again.
PARALLEL PORT NOT AVAILABLE FOR GPIO
Error Number You have dellned the parallel port as COPY for sequencing in
165 the HP-IB menu. 'lb access the parallel port for general purpose
I/O (GPIO), set the selection to [GPIO].
Service Key Menus and Error Messages