Keysight N9927-90001 User’s Guide 179
SA (Spectrum Analyzer) Mode
SA Mode Settings
—Press Default All to return all traces to their default settings: Trace 1
(Clear/Write); all other traces (Blank).
Average Type
In SA Mode, there are four different processes in which Averaging is performed:
—Average Traces – Learn more in “Averaging” on page 195.
— Detection Method Averaging – Learn more in “Detection Method” on
page 188.
— Noise Marker Averaging - Learn more in “Noise Marker” on page 191.
— Video BW filtering (for non-Zero Span measurements) - Learn more in
“Video Bandwidth (Video BW)” on page 166.
There are three types of mathematical averaging that can be performed – Log,
Linear, or Voltage (see “Average Type” on page 179). 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 Average Type [current setting]
— Then choose from the following:
—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.
—Voltage
Trace 4 data WILL be overwritten by the FieldFox when using the
Independent Source Normalize feature (“Independent Source/Tracking
Generator ” on page 163) or using Field Strength antenna or cable
corrections (“Field Strength Measurements” on page 156).
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