55
Functions and Measurements
Making Distortion Measurements
Notice the
Marker
'
amplitude readout. This is the difference of the
distortion product amplitude between 0 dB and 10 dB input
attenuation settings. If the
Marker
absolute amplitude is
approximately 1 dB for an input attenuator change, the analyzer
is generating, at least in part, the distortion.
The
Marker
amplitude readout comes from two sources:
1)
Increased input attenuation causes poorer signal-to-noise ratio.
This causes the
Marker
to be positive.
2)
The reduced contribution of the analyzer circuits to the harmonic
measurement causes the
Marker
to be negative.
Large
Marker
readout indicates significant measurement errors.
Set the input attenuator to minimize the absolute value of
Marker
.
Summary of Contents for N9321C
Page 36: ...Getting Started Helpful Tips 28 ...
Page 110: ...Functions and Measurements Files Operation 102 ...
Page 180: ...Key Reference Trace Det 172 ...
Page 212: ...Menu Maps Name Editor Menu 204 Name Editor Menu ABCDEFG HIJKLMN Return OPQRSTU VWXYZ Name ...
Page 214: ...Menu Maps SPAN Menu 206 SPAN Menu Span Span Full Span Zero Span Last Span ...
Page 216: ...Menu Maps Trace Det Menu 208 ...
Page 219: ......