Keysight N5221A/22A Service Guide 3-17
Tests and Adjustments
Preliminary Checks
Figure 3-6 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.
Cable Magnitude and Phase Stability Check
1. With the test port cable still connected to Port 1, connect a short to the
other end of the cable.
2. Press UTILITY .
3. Press TRACE/CHANNEL , then . In the New Trace
dialog box, click the S11 box, and then click OK.
4. Press RESPONSE , then , then ENTRY .
5. Press RESPONSE . Verify that is ON. If not, press
the softkey to toggle it ON.
The Averaging Factor box will appear directly above the display. In the
Averaging Factor box, type 50 or click the arrows to select 50, and then
press ENTRY .
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