Display Line - Keysight Technologies FieldFox N9912A104 User Manual

SA (Spectrum Analyzer) Mode
SA Mode Settings
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 Detector.
— 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 more in
about Limit Lines" on page
Keysight N9912-90001 User's Guide
— Auto Displays the most appropriate Detection method based on
other settings. [# is NOT shown]
— Normal [Nrm] Provides a better visual display of random noise than
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.
— Positive Peak [Pk] Displays the maximum value of all the
measurements in each bucket. This setting ensures that no signal is
missed. However, it is not a good representation of the random noise
in each bucket.
— Negative Peak [NPk] Displays the minimum value of all the
measurements in each bucket.
— Sample [Smp] Displays the center measurement of all the
measurements in 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.
— Average [#RMS] Displays the Root Mean Squared (RMS) average
power of all the measurements in each bucket. This is the preferred
method when making power measurements.
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