Keysight Technologies N9340B, User Manual

Page: 56 / 172

Making Measurements

Making Distortion Measurements
50
3 Change the center frequency to the value of the
second (400 MHz) harmonic:
• Press [MARKER] > {Peak Search}
• Press [MARKER] > {Marker To} > {To Center}
4 Change the span to 50 MHz and re-center the signal:
• Press [SPAN] > 50 > {MHz}
• Press [MARKER] > {Peak Search}
5 Set the attenuation to 0 dB:
• Press [AMPTD] > {Attenuation} > 0 > {dB}
• Press [MARKER] > {Marker To} > {To Ref}
6 To determine whether the harmonic distortion
products are generated by the analyzer, first save the
trace data in trace 2 as follows:
• Press [TRACE] > {Trace (2)}
• Press [TRACE] > {Clear Write}
7 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] > {View}
• Press [MARKER] > {Peak Search}
• Press [MARKER] > {Delta}
The Figure 4-14 shows the stored data in trace 2 and the
measured data in trace 1. The Marker Delta indicator
reads the difference in amplitude between the reference
and active trace markers.