ADInstruments AD8000 Series Instruction Manual page 69

AD8000 Series Spectrum Analyzer Instruction
Manual
In the figure above there is a '#' before VBW, in which '#' indicates that
VBW parameter is in 'Manu' state now.
(3) Video Average
Set the 'Video Avg' to 'On', then the spectrum will calculate the average
value of current trace and previous traces values. The more times the video
average, the more previous data it would take. The default state of 'Video
Avg' is 'Off'.
The video average, same as decreasing VBW is very important to add S/N,
but it is faster than the later. In fact video average only collects data once,
and the average is calculated by the computer. VBW is increasing the
charging/discharging time of the capacity in hardware. In video average
mode, the detection mode is set as sample mode automatically.
Turn on the corresponding soft-key to turn on the video average mode. The
default average time is 100. Press the number keys to enter the time (1-100).
The average time would be shown at the left of the screen when video
average is on.
Fig. 3-28 Video Average On
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