328 N9030B PXA Signal Analyzer Service Guide
Hardware Options
A25 Wideband Analog IF Troubleshooting - Option B1X and B85
Verify the 2400 MHz Frequency Reference
1. Turn the instrument off.
2. Remove the instrument cover. Refer to Chapter 16, “Assembly
Replacement Procedures” in this service guide.
3. Turn on the signal analyzer and wait for the instrument to complete the
boot up process.
4. Press System, Alignments, Auto Align, Off.
5. Press Mode, IQ Analyzer
6. Press Meas, Complex Spectrum
7. Press Input/Output, RF Calibrator, 50 MHz
8. Press Mode Setup, IF Path, 160 MHz
9. Verify the 50 MHz signal is at −25 dBm on the analyzer display by pressing
FREQ, 50 MHz, SPAN, 1 MHz, Peak Search on the analyzer. The marker
readout should be 50 MHz at −25 dBm ±3 dB. If this reference signal is
measuring incorrectly, see Chapter 4, “RF Section Troubleshooting
(RF/Microwave Analyzers)” in this service guide.
10.Connect a known good spectrum analyzer to A25J302. Verify reference
signal at 2400 MHz at a level of −30 dBm.
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