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How to set Detection Method
The current Detection method is labeled on the left edge of the screen. When a
method is selected manually, a # precedes the label. For example: # Nrm means
that Normal was selected from the softkeys.
Press Trace__6
Then
Then choose from the following
Display Line
A display line is a simple, horizontal line that can be placed at any amplitude
level on the SA screen. Use a display line as mental guide for visual feedback. A
display line is similar to a Limit Line, except that no PASS/FAIL testing occurs.
A display line is easier to create than a Limit Line. Learn about Limit Lines on
page 130.
SA (Spectrum Analyzer) Mode
Detector
Auto
Displays the most appropriate Detection method based on other
o
settings. [ # is NOT shown]
[Nrm] Provides a better visual display of random noise than
Normal
o
Positive peak and avoids the missed-signal problem of the Sample Mode.
Should the signal both rise and fall within the bucket interval, then the
algorithm classifies the signal as noise. An odd-numbered data point
displays the maximum value encountered during its bucket. An even-
numbered data point displays the minimum value encountered during its
bucket. If the signal is NOT classified as noise (does NOT rise and fall) then
Normal is equivalent to Positive Peak.
[Pk] Displays the maximum value of all the measurements in
Positive Peak
o
each bucket. This setting ensures that no signal is missed. However, it is not
a good representation of the random noise in each bucket.
[NPk] Displays the minimum value of all the measurements
Negative Peak
o
in each bucket.
Sample
[Smp] Displays the center measurement of all the measurements in
o
each bucket. This setting gives a good representation of the random noise in
each bucket. However, it does not ensure that all signals are represented.
[#RMS] Displays the Root Mean Squared (RMS) average power of
Average
o
all the measurements in each bucket. This is the preferred method when
making power measurements. Learn more on page 129.
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