Average Type; Average Count - Keysight N9912A User Manual

SA (Spectrum Analyzer) Mode
SA Mode Settings

Average Type

In SA Mode, there are four different processes in which Averaging is performed:
— Average Traces – Learn more in
— Detection Method Averaging – Learn more in
page
— Noise Marker Averaging - Learn more in
— Video BW filtering (for non-Zero Span measurements) - Learn more in
"Video Bandwidth (Video BW)" on page
There are two types of mathematical averaging that can be performed. Select
ONE of these types and it is used for all of the above averaging processes.
How to set Average Type
— Press Meas Setup 4 then
— Then choose from the following:

Average Count

The Average Count setting is used mainly with the Average Trace State
described above. In this Trace State, the Average Count setting determines the
number of sweeps to average. The higher the average count, the greater the
amount of noise reduction.
When Trace (display) State is set to Average, MaxHold, or MinHold, the
average counter is shown in the left edge of the screen below the Average
Type.
For all three of these Trace States, when Sweep 3
press
to Hold.
Keysight N9912-90001 User's Guide
8-30.
— Auto - The FieldFox chooses the most appropriate type of averaging
for the current settings. When Detection Method is set to Average, a
Noise Marker is present, or a Channel measurement is active, then
Power Average is ALWAYS selected. Otherwise, Log Average is
selected.
— Log Averaging – Best for displaying Trace Averaging. LgAv is shown
on the left side of the FieldFox screen when selected.
— Power (Linear) Averaging – Best for measuring true power levels.
Used in Detection Average and Noise Marker Average.
Mathematically, trace noise is 2.5 dB higher than when using Log
Average. PAvg is shown on the left side of the FieldFox screen when
selected.
Restart to reset the sweep count to 1, perform <n> sweeps, then return
"Averaging" on page
"Detection Method" on
"Noise Marker" on page
8-21.
Average Type [current
Continuous
8-37.
8-32.
setting].
is set to OFF,
8- 29