Keysight Technologies N9321C, User Manual

Page: 62 / 220

Functions and Measurements
Making Distortion Measurements
54
The signal produces harmonic products (spaced 200 MHz from the
original 200 MHz signal) in the analyzer input mixer as shown in
Figure 3-16
.
4 Change the center frequency to the value of the first harmonic:
Press
Peak Search > Next Peak
Press
Marker > Marker To > To Center
5 Change the span to 50 MHz and re-center the signal:
Press
Span > 50 > MHz
Press
Peak Search
Press
Marker > Marker To > To Center
6 Set the attenuation to 0 dB:
Press
Amplitude > Attenuation > 0 > dB
7 To determine whether the analyzer generates harmonic distortion
products, first display the trace data in trace 2 as follows:
Press
Trace/Det > Select Trace > Trace 2
Press
Clear Write
8 Allow trace 2 to update (minimum two sweeps), then store the data
from trace 2 and place a delta marker on the harmonic of trace 2:
Press
Trace/Det > View
Press
Peak Search
Press
Marker > Mode > Delta
The analyzer display shows the stored data in trace 2 and the
measured data in trace 1. The
Marker 
indicator reads the
difference in amplitude between the reference and active markers.
9 Increase the RF attenuation to 10 dB:
Press
Amplitude > Attenuation > 10 > dB