Tektronix 2440 User Reference Manual page 49

ACQUISITION
0
1 ACQUIRE
Button
Starts/restarts the acquisition from SAVE mode.
At the completion of a single sequence acquisition, the
scope switches to SAVE storage mode and displays the
SAVE menu. Pushing ACQUIRE button momentarily
switches to ACQUIRE menu, but a fast-completing
single sequence will switch it back to SAVE menu before
ACQUIRE menu can be used. Turn SINGLE SEQ off in
TRIGGER MODE menu before pushing ACQUIRE to
use ACQUIRE menu.
Save-On-Delta causes scope to enter SAVE (Save-On-
Delta switches to off) when a live waveform exceeds
boundary limits set by a reference envelope waveform. If
GPIB mode is set for PRINTER output, screen data will
be printed. Then Save-On-Delta will be turned back on
to continue monitoring the incoming live waveforms (not
done in ROLL mode).
If GPIB mode is selected for the talk/listen mode, the
2440 will issue an SRQ notifying the Controller of the
SAVE event.
Average and Envelope acquisitions in progress will be
restarted by any of the following front-panel control
changes:
1. Any vertical or horizontal mode change.
2. A voltsidiv setting change of either channel.
3. A vertical position change of either channel.
(Average but not Envelope.)
4. Input coupling changes to either channel.
5. Changes in the Trigger mode.
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2440 User Reference Guide