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Smoothing a Waveform
The Math | Smooth command smoothes rough edges, abrupt
transitions, and spikes in the waveform. Select the part of the waveform
or segment you wish to smooth before selecting this command.
The smoothing algorithm uses a 7 data point ‘moving average’ technique.
The ‘smoothed’ Y value for the N
th
point in the selected waveform
segment is determined by averaging the Y values of:
• Up to 3 data points to the left of the N
th
point
• The N
th
point
• Up to 3 data points to the right of the N
th
point
You can undo smoothing operations, or repeat the operation several times
for additional smoothing.
Resizing a Waveform
The Math | Resize... command expands or compresses waveform data
points horizontally or vertically. Select the waveform data on which to
perform this operation, then select this command from the Math menu.
The Resize Data dialog box appears, displaying current X (point) and Y
(relative amplitude) values.
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Chapter 3 Using HP BenchLink/Arb
Performing Waveform Math
35