Technical data

85108L System Manual
System Service and Troubleshooting
Troubleshooting Strategy
6-9
4. Use specific procedures for certain symptomatic failures
If the symptoms of the failure are only present when the system is operating in the wide BW,
pulsed-RF mode, the following procedures may help determine the failure. If the symptoms are
present in both wide BW pulsed-RF and normal BW nonpulsed-RF operation, refer to the
troubleshooting section of the 8510C On-Site Service Manual for troubleshooting information.
Power loss, power holes,
and frequency related problems Use the “Unratioed Power Levels Check” in the 8510C Operating and
Service Manual.
Calibration and verification
problems Failure to pass verification of the 40 or 50 dB attenuators while passing
the 20 dB attenuator, airline and stepped impedance standard may be
caused by incorrect setting of the offset frequency for source 2 in the
multiple source setup. The correct offset frequency is 20.000017 MHz.
Software/firmware problems If your hardware appears to be working properly but the system is not
working the way you expect it to, reload the operating system software.
If this does not correct the problem, you may have encountered a
software “bug”. Determine the exact key sequence and/or setup that
causes the failure and then contact Agilent for assistance.