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EDIT Menu
AWG2021 User Manual
3 Ć85
15. Select Go Back from the current sub-menu. The display moves from the
Multiple Copy... sub-menu to the side menu.
Convolution Calculations. The Convolute... menu item appears when two or more
waveforms are being edited. It is used to convolute the section of the waveform
between the two vertical bar cursors in one editing area with the waveform
between the vertical bar cursors in another editing area. The result is normalized.
The following diagram shows the menu configuration for the Convolute... item.
Operation (More 4 of 4) Convolute...
Source
Go Back
Execute
See Page 3 -15 “Opening and Selecting Editing Areas” for further information on
designating multiple editing areas.
On a discrete system, convolution is called discrete convolution. The convolu-
tion y (n) of waveform x (n) and waveform h (i) can be expressed by the
following formula, where N is the number of data items:
y (n) +
ȍ
N–1
i+0
x (i)h(n–i)
The operation expressed by this formula is called convolution.
In this example we will perform convolution with the waveform between the
vertical bar cursors in editing area 1 as the Source, and the waveform in editing
area 2.
A Gaussian pulse of 256 points is used for Waveform1, while a Magnetic Disk
Writing signal of 512 points is used for Waveform2. The Gaussian pulse
(GAUSS_P.WFM) and Magnetic Disk Writing signal (MDSK_WR.WFM) are
included on the Sample Waveform Library Disk that came with the instrument.
Figure 3 -67 shows the waveforms for Waveform1 and Waveform2.