Keysight N9010A EXA Service Guide 277
Analog/Digital IF Troubleshooting
25 MHz BW IF Section
12.The analyzer should read 22.5 MHz at −25 dBm ± 4 dB as shown in Figure
7-9.
Figure 7-9 A3 Digital I.F. Input
If the 22.5 MHz signal is not measuring the correct power level, see “A2
Analog I.F. Troubleshooting” on page 265 in this service guide.
Verifying the 10 MHz Reference Input
1. Perform an instrument shut down.
2. Remove the cover of the analyzer. Refer to Chapter 15, “Assembly
Replacement Procedures”, on page 463 in this service guide.
3. Turn the instrument over so that the bottom is facing up.
4. Turn on the analyzer and wait for the instrument to complete the boot up
process.
5. Press System, Alignments, Auto Align, Off.
6. Press Input/Output, RF calibrator, 50 MHz.
7. Verify the 50 MHz signal is at −25 dBm by pressing FREQ, 50 MHz, SPAN,
1 MHz, Peak Search on the analyzer. The marker readout should be
50 MHz at −25 dBm ± 3 dBm. If this reference signal is measuring
incorrectly, see Chapter 4, “RF Section Troubleshooting (RF/Microwave
Analyzers)”, on page 139 in this service guide.
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