Before Returning An Instrument To A Customer; Operational Check - Keysight N9912A Service Manual

Tests and Adjustments

Before Returning an Instrument to a Customer

Before Returning an Instrument to a Customer

When finished servicing an N9912A analyzer, perform the following before returning the unit to the
customer:
• Set the Display Colors to Indoors and the display Brightness to 80% via
Service (7) > Display.
• Perform an Operational Check as described in the following section.
• Connect and disconnect the external battery charger while the N9912A is operating and confirm that the
power cord icon is displayed appropriately at the top of the display.
• Charge the battery to 80% or higher.

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.
NOTE If the operational check fails, allow the instrument to warm up for 15 minutes and try again.
3-6
RF Analyzer
N9912A
Service Guide N9912-90003