Keysight Technologies N5224A Service Manual page 41

Tests and Adjustments
Preliminary Checks
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.
Cable Insertion Loss Check
The method below runs on the PNA environment using a mechanical Cal
kit. An appropriate ECal could be used as well to replace the mechanical
Cal kit if desired
1. Press UTILITY
2. Press STIMULUS
3. Press RESPONSE
Bandwidth to 30 Hz.
4. Press STIMULUS
5. Perform a 1-port calibration on the PNA Port 1 using SmartCal (Guided
Calibration). Follow the calibration wizard instructions. After calibration,
the PNA prompts you to save the cal set as a user Calset. Save the cal set
data as CalSet_1.cst.
6. Connect the test port cable to the PNA Port 1 and perform a 1-port
calibration again at the end of the cable. After calibration, save the cal set
data as CalSet_2.cst.
Keysight N5224A/25A Service Guide
.
Preset
Sweep , then Number of Points
, then
Avg IF Bandwidth
and set the power level to -17 dBm.
Power
, and set to 801.
, and set the IF
3-15