2-38 Keysight M937xA PXIe Service Guide
Tests, Adjustments, and Troubleshooting
Performance Tests
2-
Receiver Compression Test
Function of the Test
To measure the compression at the analyzer’s specified maximum power level
for the receivers.
Specification Tested
Test Port Input – Maximum Test Port Input Level
Equipment Used
- U3070AK01 Compression Test Set
1
- Two 3.5 mm (-m- to -f-) test cables
- Two 11901A 2.4 mm (-m-) to 3.5 mm (-m-) adapters
- Components for the PNAasPowerMeter
1
:
— PNA (N5241A/42A, or N5221A/22A, or E8363C/64C
2
)
— 10 dB attenuator
— 3.5 mm (-m- to -f-) test cable
— 83059B 3.5 mm (-f- to -f-) adapter
- Components for calibrating the PNAasPowerMeter:
— U8485A USB Thermocouple Power Sensor (or N8485A power sensor
with N1912A/13A/14A power meter
1
)
— ECal module (N4691B)
Description of the Test
For most analyzer models, the receiver compression level is higher than the
maximum source output power. Therefore, an external amplifier is required.
This test also requires that two attenuators be switched in and out of the RF
path. These requirements are met with the use of the Compression Test Set.
The procedure outlined here is for those models which require the test set.
1. The PNA, with cable, adapter, and 10 dB attenuator, is calibrated for use as
a highly accurate, tuned power meter. This set is referred to as
PNAasPowerMeter.
2. Connect one of the 11901A 2.4 mm to 3.5 mm adapters to a 3.5 mm test
cable, then connect the adapter end of the cable to the compression test
set input port.
1. Refer to Power Measurement Receiver System (PNAasPowerMeter).
2. Refer to Get the Hardware Required for your GPIB Instruments.
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