Table of Contents
Advertisement
Analog/Digital IF Troubleshooting
A2 Analog IF Troubleshooting
Verifying the 22.5 MHz Output Power
1. Perform an instrument shutdown.
2. Turn the instrument over so the bottom side of the analyzer is facing up.
3. Turn on the PXA Signal Analyzer and wait for the instrument to complete
4. Press System, Alignments, Auto Align, Off.
5. Press Input/Output, RF calibrator, 50 MHz.
6. Verify the 50 MHz signal is at −25 dBm by pressing FREQ, 50 MHz, SPAN,
7. To continue verifying press SPAN, Zero Span. Verify the input attenuator
8. Referring to
Figure 7-3
A3 Digital IF Cables
9. Connect the W42 cable to the MMCX female to SMA female connector.
N9030A PXA Signal Analyzer Service Guide
the boot up process.
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.
on the PXA is set to 10 dB. Look near the top of the display near the center
and verify that Atten: 10 dB is visible. If needed change the input
attenuator by pressing AMPTD, Attenuation, 10 dB on the analyzer.
Figure
7-3, carefully disconnect the W42 cable at A3J19.
Use an appropriate cable to go from the SMA connector to the RF input of
a functioning spectrum analyzer to verify the 22.5 MHz I.F. and amplitude
is correct.
233
Advertisement
Table of Contents
Troubleshooting
