SA (Spectrum Analyzer) Mode 91
o Log Averaging – Best for displaying Trace Averaging. LgAv is shown on the
left side of the FieldFox screen when selected.
o 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.
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 Continuous is set to OFF,
press Restart to reset the sweep count to 1, perform <n> sweeps, then return to
Hold.
How to set Average Count
Press Meas Setup 4
Then Average Count
Enter a value from 1 to 10,000 using the numeric keypad, the ▲|▼ arrows, or
the rotary knob.
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 89.
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.
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