Detection Method - Keysight N9912A User Manual

 Then
 Enter a value from 1 to 10,000 using the numeric keypad, the ▲|▼ arrows, or the
 Press Enter

Detection Method

In SA Mode, the X-axis is comprised of data points, also known as "buckets". The
number of data points is specified using the Resolution setting. Learn how on page
87.
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.
One bucket showing Positive peak, Sample, and Negative peak Detection methods.
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
SA (Spectrum Analyzer) Mode
Average Count
rotary knob.
Detector
Displays the most appropriate Detection method based on other
Auto
o
settings. [ # is NOT shown]
[Nrm] Provides a better visual display of random noise than Positive
Normal
o
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.
:
89