Keysight N5221A Service Manual page 43

PNA Series Microwave Network Analyzers
N5221A/22A
Cable Insertion Loss Check
1. With the test port cable still connected to Port 1, connect a short to the other end of the cable.
2. Press MARKER/ANALYSIS
Type box, select Minimum.Click Execute, and then click OK.
3. The displayed response is twice the actual loss. To get the actual worst case insertion loss, divide the
value at the marker annotation by two. Refer to the cable manual to see if it meets the insertion loss
specification. For an example of a typical insertion loss measurement, see
Figure 3-5 Typical Cable Insertion Loss Response
If the Cable Insertion 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 N5222-90001
Search , then Search . In the Marker Search dialog box, in the Search
Figure
Tests and Adjustments
Preliminary Checks
3-5.
3-15