EDIT Menu

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.

Source

Operation ￿More 4 of 4￿ Convolute...Go Back

Execute

See Page 3 -15 ªOpening and Selecting Editing Areasº for further information on designating multiple editing areas.

On a discrete system, convolution is called discrete convolution. The convolution 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:

N±1

y (n) + ￿x (i)h(n±i)

i+0

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.

AWG2021 User Manual

3 ￿85