Verifying Aux If Out, Rear Panel (Option Cr3, Crp Only); Standard Analyzer - Keysight n9020a Service Manual

Front End Control Troubleshooting
A15 Front End Control Assembly Troubleshooting
Verifying Wideband IF Out (A15J901, Options B40, B85, B1A, or B1X)
The outer cover and top shield need to be removed to verify A15J901 output.
Refer to Chapter 14, "Assembly Replacement Procedures"
procedure. Press Mode, IQ Analyzer (Basic), Mode Preset on the analyzer.
Press Input/Output, RF Calibrator, 50 MHz, Freq, 50 MHz, Amptd,
Attenuation, 10 dB, Amptd, More 1 of 2, Internal Preamp Off, System,
Alignments, Auto Align, Off. Disconnect the cable marked J901 that plugs
into the Front End Controller board and connect a functioning spectrum
analyzer where the cable was plugged in. J901's I.F. output will vary
depending on the I.F. path that is chosen. Press Mode Setup, IF Path and
select 40 MHz. If the switch path is working correctly in the A15 Front End
Controller board, the functioning spectrum analyzer should measure 250 MHz
at approximately -30 dBm.
If Options B85, B1A, or B1X are also present, press Mode Setup, IF Path and
select either 85 MHz, 125 MHz, or 140 MHz (whichever is present). If the
switch path is working correctly in the AI5 Front End Controller board, the
functioning spectrum analyzer should measure 300 MHz at approximately -30
dBm.
In order for these I.F. levels to measure correctly, the I.F. input at A15J902
must be correct. Refer to
all cables to their correct location when finished.

Verifying Aux IF Out, Rear Panel (Option CR3, CRP only)

The Aux I.F. output connector on the rear panel is installed on all analyzers
equipped with the EFEC version of the A15, however the actual Aux I.F. output
frequency will vary depending on the options installed. These options are all
enabled with a license key. The first step in verifying the Aux I.F. output is the
make sure the option is licensed by pressing System, Show, System on the
analyzer and make sure the option identifies itself in the table.
The I.F. switch path and frequency generation occurs on the A15, Front End
Controller board. This troubleshooting procedure provides the instrument
setups to verify options CR3 and CRP. Test the Aux I.F. output based on the
options installed in the analyzer.

Standard Analyzer

No test to perform.
Chapter 4, "RF Section
225
for the removal
Troubleshooting". Reconnect