Keysight N9912A Service Guide 3-7
Tests and Adjustments
Operational Check
Operational Check
1. Preset the instrument, press Preset (.) > Preset.
2. Leave the RF OUT connector open.
3. Press: Scale/Amptd > Ref Pos > 2 > Enter
4. The trace should be within +/- 5 dB of 0.00 dB.
5. Connect a known good load to the RF OUT connector.
6. The trace should be below 30 dB.
7. Press: Measure > More. If an Insertion Loss softkey is displayed, then do
the following:
a. Press: Insertion Loss.
b. Connect a short cable between the RF OUT and RF IN connectors.
c. The trace should be within +/- 15 dB of 0.00 dB.
8. Press: Mode. If an SA softkey is displayed, then do the following:
a. Press: SA
b. Leave the RF IN connector open.
c. Between 30 MHz and 5 GHz, the trace should be below -45 dBm.
d. Between 5 GHz and 6 GHz, the trace should be below -35 dBm.
If the operational check fails, allow the instrument to warm up for 15
minutes and try again.
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