Chapter 7 645
Language Reference
VAVG Video Average
VAVG Video Average
Syntax
Figure 7-287 VAVG Syntax
Description
The VAVG command activates the video averaging function. Video
averaging smooths the displayed trace without using a narrow
bandwidth. VAVG sets the IF detector to sample mode (see the DET
command) and smooths the trace by averaging successive traces with
each other. If desired, you can change the detector mode during video
averaging.
Video averaging is available only for trace A, and trace A must be in
clear-write mode for VAVG to operate. After VAVG is executed, the
number of sweeps that have been averaged appears at the top of the
analyzer screen.
Using video averaging allows you to view changes to the entire trace
much faster than using narrow video filters. Narrow video filters
require long sweep times, which may not be desired. Video averaging,
though requiring more sweeps, uses faster sweep times; in some cases,
it can produce a smooth trace as fast as a video filter.
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