258 N9030B PXA Signal Analyzer Service Guide
LO Synthesizer/Reference Troubleshooting
A14 LO Synthesizer and A20 YTO Troubleshooting
7. Verify the 4800 MHz signal from the A16 Reference Assembly is stable by
pressing SPAN, 50 kHz, BW, 1 kHz on the functioning spectrum analyzer.
The signal on the functioning spectrum analyzer should be very stable
both in frequency and power as shown in Figure 8-4.
8. Reconnect W31 A14J4.
Figure 8-4 4800 MHz Narrow Span
If the 4800 MHz signal is not measuring the correct power level, see the
“A16 Reference Assembly Troubleshooting” section later in this chapter.
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