2-14 Keysight M937xA PXIe Service Guide
Tests, Adjustments, and Troubleshooting
Preliminary Checks
2-
The Test Port Cable Checks
A faulty test port cable can cause a failure in the verification test. The following
checks are not required, but are recommended to verify the performance of the
test port cable.
- “Cable Return Loss Check” on page 2-14
- “Cable Insertion Loss Check” on page 2-15
- “Cable Magnitude and Phase Stability Check” on page 2-16
- “Cable Connector Repeatability Check” on page 2-17
Accessories Used in the Test Port Cable Checks
Cable Return Loss Check
1. On your PC screen, click the Network Analyzer icon.
2. Make your network analyzer configuration settings.
3. Click Utility > Preset.
4. Click Cal > Start Cal > Cal Wizard, and perform a 1-port reflection
calibration on Port 1. Refer to Help if necessary.
5. Connect the test port cable to Port 1.
6. Connect a broadband load to the other end of the cable. Tighten to the
specified torque for the connector type. The analyzer now displays the
return loss of the cable.
7. Click Marker/Analysis > Marker Search > Max.
8. The marker annotation on the screen indicates the worst case return loss.
Refer to the cable manual to see if it meets the return loss specification. For
an example of a typical return loss measurement, see Figure 2-4 on
page 2-15.
Equipment Type Model or Part Number Alternate Model or Part Number
Calibration Kit, 3.5 mm 85052B 85052D
Test cable, 3.5 mm (-m- to -m-) 11500E Any equivalent
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