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KEY FUNCTIONS
Change the modulation level again and press m A,
and store with (,,,. A. The three traces are differenti-
ated by intensity.
VIDEO AVERAGING
Video averaging is a trace display routine that averages trace responses from sweep to sweep without requiring a
narrow video bandwidth. (Averaging with the video bandwidth is discussed in Chapter 8, COUPLED FUNCTION
measure low-level signals by smoothing the noise response.
To activate video averaging (and sample detection
To disable video averaging, press (,, @
Video averaging may result in an uncalibrated amplitude display when
Readout in the active function display area is "VID AVG 100". The number represents the maximum number of
samples (or sweeps) for complete averaging. The DATA entry can be used to change the maximum sample
number in integers from 0 to 1000. A unity sample limit allows direct writing of analyzer response into Trace C (see
Trace C below). A 100 sample limit is selected upon instrument preset. The higher the sample limit, the more
smoothing possible. Averaging with high sample limits can provide more smoothing than the 1 Hz video band-
width.
During video averaging, the current sample being taken is read out at the left of the display.
mode),
G
press (z] [??I (DATA keyboard entry)
H
CAUTION
frequency span
Resolution Bandwidth
.
> 1000
Manual Operation 101
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