China Electronics Technology Instruments AV3672 Series, User Manual

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6 Measurement Optimization
6.6 Reduction of Trace noise
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Fig. 6.13 Setting of Sweep Averaging
Attention
Click [Restart Average] in the sub-menu to start a group of new average sweep.
6.6.2 Track Smoothing
The smoothing function is used to reduce the peak-peak noise of broadband measurement data. The data of part of
the displayed trace are averaged by the analyzer. The number of adjacent data points subject to averaging at the
same time is also known as the smoothing aperture. The aperture can be defined as the number of data point or the
percentage of X-axis span.
Prompt
Use of the smoothing function:
➢
Use sufficient points in the display to avoid misleading results.
➢
The smoothing function must not be applied to the highly resonant device or the device subject to broad trace
changes, as measurement errors may be caused.
➢
The smoothing function can be independently set for each trace.
1) Influence of trace smoothing
Fig. 6.14 Influence of Track Smoothing on Measurement Results
2) Setting of trace smoothing
Menu path: [Response] > [Avg] > [Smoothing...] .
Click [Smoothing] to enable the smoothing function.
Select the method to specify the value of the smoothing aperture:
a) Enter the smoothing percentage in the [Percent] box. (Max. 25%)
b) Enter the number of smoothing points in the [Points] box. (The maximum value is 25% of the total number of