Keysight Technologies X Series Service Manual page 297

Analog/Digital IF Troubleshooting
40 MHz BW IF Section
Verifying the 250 MHz IF Input Power (Option B40 only)
Perform this procedure only if the analyzer is equipped with Option B40, Analysis Bandwidth,
40 MHz
1. Perform an instrument shutdown.
2. Remove the cover of the analyzer. Refer to
3. Turn the instrument over so that the bottom side of the analyzer is facing
4. Turn on the analyzer and wait for the instrument to complete the boot up
5. Press Mode, IQ Analyzer (Basic), Mode Setup, IF Path, 40 MHz.
6. Press System, Alignments, Auto Align, Off.
7. Press Input/Output, RF calibrator, 50 MHz.
8. Verify the 50 MHz signal is at −25 dBm by pressing FREQ, 50 MHz, SPAN,
9. To continue verifying press Meas, IQ Waveform. Verify the input
Keysight N9010A EXA Service Guide
Replacement Procedures"
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.
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, 10 dB on the analyzer
Chapter 15, "Assembly
in this service guide.
297