4-8 Keysight N9912A Service Guide
Troubleshooting
Measurement Group Troubleshooting
4-
Measurement Group Troubleshooting
If calibration with the standard Type-N cal kit (1250-3607 or N9910X-800)
gives unexpected results:
— Make sure the unit is warmed up for at least 30 minutes.
— Make sure the correct cal kit definition is being used; erase user data to
force use of factory cal kit definitions (see Chapter 8 for information on the
“Erase User Data Utility”).
If there appears to be LAN communication problems:
— Use only 100 Base T LAN connections. Sometimes there are problems with
the slower speed 10 Base T connections.
If “ADC Overload” error messages are displayed during S21 or insertion loss
measurements:
— Perform the “ADC Overload Adjustment” under “Adjustments (Keysight
N7841A Software Package)” in Chapter 3.
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