Keysight Technologies N5224/5A Service Manual page 49

Tests and Adjustments
Preliminary Checks
If the Cable Magnitude and Phase Stability 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 Connector Repeatability Check
The connector repeatability measurement should be done at the test port
as well as at the end of the test port cable.
1. With the test port cable still connected to Port 1, connect a broadband
load to the other end of the cable.
2. Press UTILITY
3. Press RESPONSE
the
The Averaging Factor box will appear directly above the display. In the
Averaging Factor box, type 100 or click the arrows to select 100, and then
press ENTRY
4. Wait for the analyzer to average the measurement 100 times
(approximately five seconds).
5. To normalize the data trace: press MARKER/ANALYSIS
Data Trace
6. To adjust the display scale:
a. Press RESPONSE
b. Press
7. Disconnect and then reconnect the cable to the test port. Tighten the
connection to the specified torque for the connector type.
8. Press RESPONSE
9. Look at the trace for spikes or modes.
Keysight N5224A/25A Service Guide
Preset .
. Verify that
Avg
softkey to toggle it ON.
Average on/OFF
Enter .
, then Data Math
Scale
The Scale Per Division box will appear directly above the display.
Set the Scale Per Division for 0.5 dB. Press ENTRY
Reference Level
The Reference Level box will appear directly above the display. Set
the Reference Level for 0 dB. Press ENTRY
, then
Avg
Average ON/off
, then Data/Memory
, then .
Scale
.
Enter
.
Averaging Restart
is ON. If not, press
, then
Memory
, then ENTRY Enter .
.
Enter
.
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