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SNA5000A Vector Network Analyzer User Manual 50
Figure 2-10 Set the IF from the status bar
2.8.4 Smoothing
Trace smoothing averages several adjacent data points to smooth the displayed trace.
The number of adjacent data points that get averaged together is also known as the smoothing
aperture. You can specify the aperture as either the number of data points or the percentage
of the x-axis span.
Trace Smoothing reduces the peak-to-peak noise values on broadband measured data. It
smooths trace noise and does not increase measurement time significantly.
Smoothing setting:
Using the Softkey for setting: Press the ”Avg BW” key, “Avg BW” > Smoothing then enter
the Smoothing menu.
Figure 2-11 Smoothing menu
A. Smooth On|Off When is On, applies smoothing to the displayed trace.
B. Percent of Smooth: Specify the percent of the swept stimulus span to smooth. For
example, for a trace that contains 100 data points, and a smoothing percent of span =
11%, then the number of data points that are averaged is 11.
C. Smooth Points: Specify the number of adjacent data points to average.
Tips:
• Start with a high number of display points and reduce until you are confident that the trace
is not giving misleading results.
• Do not use smoothing for high-resonance devices, or devices with wide trace variations.
It may introduce misleading information.
• Smoothing is set independently for each trace.
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