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Arbitrary Waveform Generation
Selecting and Outputting Arbitrary Waveforms 9
The horizontal size of the waveform being copied does not have to be the same as the
waveform being created. When the waveform is copied, by pressing the create soft
key, the software compresses or expands the source waveform to create the copy. When
the source is expanded the copy has additional interpolated points; when the source is
compressed, significant waveform data may be lost, particularly from arb waveforms
with narrow spikes if the compression ratio is large.
The menu can be exited by pressing the cancel soft key, which keeps the name but
does not implement the copy, or by pressing the create soft key, which makes the
copy and returns the screen to the ARBITRARY WAVEFORMS list.
Modifying Arbitrary Waveforms
Pressing the MODIFY front panel key calls the MODIFY screen.
MODIFY: WFM1
resize… rename…
delete… info…
edit wfm…
This screen gives access to a number of menus which permit the selected waveform to be
resized, renamed, edited, etc. The arb waveform to be modified is selected using the
rotary control or cursor keys to step through all possible choices; the current selection is
displayed on the top line beside MODIFY.
Resize Waveform
Pressing the resize… soft key on the MODIFY screen calls the Resize screen.
Resize: WFM11
(old size: 0016000)
new size: 0
001024
cancel resize
Resize changes the number of points in the waveform; the new size can be larger or
smaller than the old size. When the new size is larger, the software adds additional
interpolated points. When the size is smaller, points are removed. Reducing the
waveform size may cause the waveform to lose significant data.
Enter the size required by pressing the new size soft key followed by direct entries
from the keyboard or by using the rotary control. Resize is implemented by pressing the
resize soft key or aborted by pressing the cancel soft key; both return the display
to the MODIFY screen. There is no "undo" facility for resize.
9-5
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