Modular Instrument Level - Checking Operation <2.75 Ghz (M9351A Path) - Keysight M9392A Startup Manual

b. 100 MHz Ref Lock - Indicates the M9351A does not detect a 100 MHz REF IN. If you get a 100
MHz Ref Unlock indication, check cable B1, 100 MHz REF 1 OUT to M9351A 100 MHz REF IN.
If this cable is removed it does not affect the Field Calibration.
c. If all cables are properly connected, verify the LO outputs by using the M9302A Operational Check.
4. M9302A- LO Unlock:
a. LO Unlock indicates that the M9302A module has a LO failure and needs to be replaced.
Modular Instrument Level - Checking Operation <2.75 GHz (M9351A path)
Setting the M9392A SFP Input Power below the actual RF input level creates an OVERLOAD con-
dition that stops sweep and can damage the downconverter. Once the Input Level is reset and the
OVERLOAD condition cleared, Select Sweep: Cont to restart sweep.
1. Select Utility > Reset.
2. Select the Display tab.
a. Set Display: Frequency
b. Frequency Display: Auto Scale (unchecked)
c. Scale: 10 dB/div
d. Ref Level: +30 dBm
3. Under the Meas tab, the Settings should be as follows:
a. Use Preselector: (unchecked)
b. Frequency: 50 MHz
c. Input power: set to +30 dB
d. Time span: 100 µs
e. Trigger - Source Free Run
f. Sweep - Cont.
4. Connect an RF signal to the M9360A RF IN. Set the source to the following frequency and power:
a. Frequency: 50 MHz
b. Power Level: -20 dBm
5. With the M9392A set to display frequency:
a. Monitor the signal level while stepping the source and M9392A up in frequency in 100 MHz steps to
2.74 GHz.
b. The power level should stay within ± 3 dB.
c. If power levels vary more than expected, check that cables are properly connected and torqued.
d. Recheck areas of concern.
e. If power levels still vary greater than expected, perform the M9351A, M9360A, and M9302A mod-
ule level operational checks.
6. Select Utility > Reset.
Agilent M9392A PXI Vector Signal Analyzer Startup Guide
M9392A Troubleshooting
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