Keysight M937xA PXIe Service Guide 2-39
Tests, Adjustments, and Troubleshooting
Performance Tests
3. Connect the other 11901A 2.4 mm to 3.5 mm adapter to a 3.5 mm test
cable, then connect the adapter end of the cable to the compression test
set output port.
4. The analyzer is Preset. The two compression test set output attenuators are
set to 0 dB.
5. The analyzer is set up for a 201 point CW transmission measurement for the
port pair to be tested with the specified IF bandwidth (typically 1 kHz).
6. The test cable on the compression test set input port is connected to the
analyzer source port.
7. The test cable on the compression test set output port is connected to the
PNAasPowerMeter.
8. For a series of CW frequencies across the full frequency range of the
analyzer, the source output level is adjusted to achieve the specified
receiver compression power level (typically the receiver’s maximum input
power level.)
9. The PNAasPowerMeter is disconnected from the test cable and the cable is
connected to the port to be tested.
10.The analyzer steps through each CW frequency as the absolute log
magnitude value (dBm) and the relative phase for the receiver under test is
read (P
a
).
11.The first compression test set output attenuator is set to 20 dB.
12.The magnitude and phase measurements using the receiver under test are
read: (P
b
).
13.The second compression test set output attenuator is set to 20 dB.
14.The magnitude and phase measurements using the receiver under test are
read: (P
c
).
15.The first compression test set output attenuator is set to 0 dB.
16.The magnitude and phase measurements using the receiver under test are
read: (P
d
).
17.The compression for each point is calculated as (P
a
– P
b
) – (P
d
– P
c
)
If the Analyzer Fails this Test
If the analyzer fails this test, return it to Keysight for repair. Refer to “Shipping
Your Network Analyzer for Service or Repair” on page 1-3.
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