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Measuring Noise
Measuring Noise Using the Noise Marker
Figure 7-2 Noise marker
10Set the analyzer to zero
span at the marker
frequency.
a. Press Mkr→, Mkr→CF.
b. Press SPAN X Scale, Zero
Span.
c. Press Marker.
Note that the marker amplitude value is
now correct since all points averaged are
at the same frequency and not influenced
by the shape of the bandwidth filters.
See Figure 7-3.
Remember that the noise marker
calculates a value based on an average of
the points around the frequency of
interest. Generally when making power
measurements using the noise marker on
discrete signals, first tune to the
frequency of interest and then make your
measurement in zero span (time domain).
Step Action Notes
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