A14 L.o. Synthesizer Troubleshooting - Keysight n9020a Service Manual

L.O. Synthesizer/Reference Troubleshooting

A14 L.O. Synthesizer Troubleshooting

A14 L.O. Synthesizer Troubleshooting

Turn on the analyzer and wait for the instrument to complete the boot up
process. There are (6) processes to perform, which will verify the L.O.
Synthesizer Assembly is functioning properly:
— Press Freq, 50 MHz, SPAN, Zero Span. LED's DS1-DS3 located near the top
— Press System, Alignments, Align Now, All. If the alignment functions
— Measure 4800 MHz Input frequency (from A16 Reference Assembly)
— Measure 4800 MHz Input Power (from A16 Reference Assembly)
— Measure L.O. Output Power.
— Measure L.O. Output Frequency.
These items can be checked with a functioning spectrum analyzer using cables
and connectors that function well up to 10 GHz.
Figure 7-1 A14 L.O. Synthesizer Assembly
of the board next to J10 should all be off. See LED location in
below.
correctly with no error messages on the analyzer display, most of the board
is working properly.
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Figure 7-1