Keysight Technologies N5224/5A Service Manual page 48

Tests and Adjustments
Preliminary Checks
6. To provide a good reference, hold the test cable in a straight line
perpendicular to the front panel of the network analyzer.
7. Press RESPONSE
8. Wait for the analyzer to average the measurement 50 times (approximately
two seconds).
9. To normalize the data trace: press MARKER/ANALYSIS
Data Trace
10.Slowly make a 180 degree bend in the middle of the cable and hold it in
that position.
11.For each trace: press RESPONSE
The Scale Per Division box will appear directly above the display. Set the
Scale Per Division for optimum viewing as shown in
12.Place a marker on the largest deflection that goes above the reference line
and is within the cable's specified frequency range. For a typical response
of cable magnitude and phase stability, see
13.Place a marker on the largest deflection that goes below the reference line
and is within the cable's specified frequency range.
In this S
propagated down the cable and reflected back from the short. Therefore,
the measured deflection value must be divided in half to reach the correct
value.
Figure 3-7 Typical Cable Magnitude and Phase Stability Response
3-18
Avg , then
, then Data Math
measurement, the displayed trace results from energy being
11
.
Averaging Restart
, then Data/Memory , then ENTRY
, then
Scale Scale
Figure
Figure 3-7.
Keysight N5224A/25A Service Guide
, then
Memory
Enter .
.
3-7.