Keysight NFA Series Noise Figure Analyzers Service Guide 273
L.O. Synthesizer/Reference Troubleshooting
A14 L.O. Synthesizer Troubleshooting
Verifying the 4800 MHz Input Power & Frequency Stability:
— Turn on the analyzer and wait for the instrument to complete the boot up
process.
—Press MODE/MEAS, Spectrum Analyzer, OK, FREQ, 4.2 GHz, Zero Span.
— Disconnect A14W6 cable at A14J200 (see Figure 8-2).
— Connect A14W6 cable end to the RF input of the functioning spectrum
analyzer.
Figure 8-2 W4 and W6 Location
DS2 and DS3 will illuminate when the W6 cable is removed. This is normal.
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