Agilent Technologies N5242A Service Manual page 45

PNA Series Microwave Network Analyzers
N5242A
Cable Return Loss Check
1. Press UTILITY Preset
2. Perform a one-port calibration on Port 1, 1-Port Reflection. Refer to the embedded help
in the analyzer if necessary.
3. Connect the test port cable to Port 1. 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.
4. Press MARKER/ANALYSIS
in the Search Type box, make sure Maximum is selected. Click Execute, and then click
OK.
5. 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 3-4 Typical Cable Return Loss Response
If the Cable Return Loss Check Fails
1. Clean the cable and devices and torque to specification. Repeat the check.
2. If the check still fails, the cable should be repaired or replaced.
Service Guide N5242-90001
.
Search , then
Search
Figure 3-4.
Tests and Adjustments
. In the Marker Search dialog box,
Preliminary Checks
3-13