30
Video Buffer Settings dialog box
Note
:
Choosing the 24-bit option for recording video (Video>Color Format>24-bit RGB (true
color) requires 3-times the buffer RAM of all other video options.
5.3
Pre- and post-trigger recording
The figure below illustrates the effect of the buffer size on the pre- and post-trigger recording
durations.
Trigger
Time
RAM Buffer
Disk Buffer
Stored video
Stored video
Time
Pre-trigger (top) and post-trigger (bottom) recording
For pre-trigger recording, you save the video sequence occurring before the trigger, stored in
the RAM buffer. With post-trigger recording you save the video sequence occurring
immediately after the trigger and temporarily stored in the disk buffer. The disk buffer is
normally larger than the RAM buffer.
5.4
Recording a video
To record a video, set the time in the
Record from
box to the desired number of seconds or
drag the slider bar between now and the maximum buffer size. This sets the time duration
recorded from the pre-trigger buffer.
Then either set the
For Duration
time, or leave it as Unlimited. The duration time represent the
total video duration (pre-trigger post trigger record time). If
Unlimited
video duration is
used, the video will record until the record button is pressed again. The total duration of the
video will be the buffer time plus the newly recorded time (the time the video button is
depressed).
Note
:
uScope software now uses buffering for the video recorded live so that this video is also
saved without dropping frames.
5.5
Snap-shot settings
A snap-shot is a single image consisting of an average of one or more consecutive images.
