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281, 282, 284
Users Manual
Modifying Arbitrary Waveforms
Certain restrictions apply to waveform modification. They are summarized at the head of
this chapter.
Pressing the MODIFY front panel key, or the create soft-key on either of the
CREATE NEW WAVEFORM menus calls the MODIFY screen:
MODIFY: vwv01
resize… rename…
delete… info…
edit waveform
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 choice is
displayed on the top line beside MODIFY.
Waveform Edit Cursor
During any arbitrary waveform modify procedure which involves setting waveform
addresses, one or more waveform cursors can be output from the rear panel
CURSOR/MARKER OUT socket. The waveform being edited must be running on the
output currently selected by the channel SETUP keys. The amplitude, polarity and width
of the cursor is set on the cursor/marker… menu of the UTILITY screen as
described chapter 14, System Operations from the Utility Menu. The cursors are
positioned at the start and stop addresses used for the various edit operations described
below (one address per cursor only for point edit). The cursor signal can be displayed on
a second channel of the oscilloscope or used to modulate the Z-axis to highlight the stop
and start addresses.
Note that the addresses are retained when moving between edit functions. Thus if the stop
and start addresses are set for waveform insert, the same addresses appear as the defaults
when wave amplitude edit is selected, for example. The addresses can of course be
changed subsequently.
Resize Waveform
Pressing the resize… soft-key on the MODIFY screen calls the Resize screen:
Resize: vwv01
(old size: 01024)
new size: 0
1024
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 new size is smaller points are removed. Reducing the
waveform size may cause the waveform to lose significant data; be careful, because there
is no "undo" for resize.
9-6
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