328 Keysight N9038A MXE Service Guide
Analog & Digital IF
A2 Analog I.F. Troubleshooting
Figure 10-2 A3 Digital IF Assembly Cable Locations
4. Connect the end of W17 to a spectrum analyzer tuned to 22.5 MHz with a
span of 5 MHz.
5. Turn the instrument self-alignment routine off by pressing System,
Alignments, Auto Align, Off.
6. Turn the internal 50 MHz Calibrator signal on by pressing Input/Output, RF
Calibrator, 50 MHz.
7. Tune the instrument to the calibrator frequency with a span of 0 Hz by
pressing FREQ, 50 MHz and Span, Zero Span.
8. Lock the instrument input attenuation to 10 dB by pressing AMPTD,
Attenuation, Mech Atten, 10 dB Man.
9. Set the instrument resolution bandwidth to 3 MHz by pressing BW 3 MHz.
10.Set the step gain to Low by pressing Meas Setup, More, Swept IF Gain,
Low Gain.
11.Verify that the 22.5 MHz IF output from the A2 Analog IF assembly
measures between -21 and -29 dBm as shown in Figure 10-3.
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