Keysight N9010B - Page 297

Keysight N9010B EXA Signal Analyzer Service Guide 297
Analog/Digital IF Troubleshooting
40 MHz BW IF Section
Verifying the 250 MHz IF Input Power (Option B40 only)
1. Perform an instrument shutdown.
2. Remove the cover of the analyzer. Refer to Chapter 15, “Assembly
Replacement Procedures” in this service guide.
3. Turn the instrument over so that the bottom side of the analyzer is facing
up.
4. Turn on the analyzer and wait for the instrument to complete the boot up
process.
5. Press MODE/MEAS. Select I/Q Analyzer (Basic) mode, Complex
Waveform measurement, and Normal view. Press OK.
6. Press Meas Setup, IF Path, IF Path 40 MHz.
7. Press System, Alignments, Auto Align, Off.
8. Press Input/Output, RF calibrator, 50 MHz.
9. Verify the 50 MHz signal is at −25 dBm by pressing FREQ, 50 MHz, Span,
1MHz, 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.To continue verifying press MODE/MEAS, select IQ Waveform
measurement, IQ Waveform view. Press OK. Verify the input attenuator on
the analyzer is set to 10 dB. Look near the top of the display near the
center and verify Atten: 10 dB is visible. If needed change the input
attenuator by pressing AMPTD, Attenuation, Mech Atten 10 dB on the
analyzer.
Perform this procedure only if the analyzer is equipped with Option B40,
Analysis Bandwidth, 40 MHz