276 Keysight N9915-90020 User’s Guide
RTSA (Real-time Spectrum Analyzer) Mode—Option 350
RTSA Mode Settings
—Clr /Wr [W] (Clear/Write) Displays the actual measured data for each
sweep.
—MaxHold [M] Displays the maximum response of the input signal at
each data point over multiple sweeps. See also Average Count in
“Average Count” on page 278.
—MinHold [m] Displays the minimum response of the input signal at
each data point over multiple sweeps. See also Average Count in
“Average Count” on page 278.
—
RMS Average [A] Each data point is averaged over multiple sweeps as
set by the Average Count setting. Learn more in
“Average Count” on
page 278
.
—
View [V] Displays and then holds the last complete measurement trace
on the screen. This is similar to storing a trace in memory.
—Blank Displays no trace.
—Press
Default All to return all traces to their default settings: Trace 1
(Clear/Write); all other traces, including trace detectors (Blank).
Detection Method
In RTSA Mode, the X-axis is comprised of data points, also known as “buckets”.
Learn more in
“Points (not user settable)” on page 275.
Regardless of how many data points are across the X-axis, each data point
must represent what has occurred over some frequency range and time
interval.
From the frequency span of the measurement, the span of each data point is
calculated as (frequency span / (data points-1)). The detection method allows
you to choose how the measurements in each bucket are displayed.
Using the RTSA feature, each of the four available traces can have an
independent detection method.
How to set Detection Method
The current Detection method for each trace is labeled on the left edge of the
screen. A corresponding letter appears below the corresponding Trace number
selected. For example: N means that Normal was the selected detector.
—Press Trace_6
—Then Detector
— Then choose from the following:
—Auto [...] Displays the most appropriate Detection method based on
other settings.
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