Imagine NEO DVR-3901, Инструкция по установке и эксплуатации

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66 DVR-3901 Installation and Operation Manual
Chapter 5: Functions and Controls
The time code that is recorded is called source time code. Set the
UseSrcTC parameter to On if you wish to play out the source time code
during playbackt. Otherwise, the DVR-3901 generates sequential time
code which starts from zero at the beginning of the playlist.
By default, all the video clips are chained in the sequence of their
relative time of recording to form a single playlist. As a result, all the
recordings can be played from beginning to end seamlessly, as if they
were from a single recording. This single playlist is referred to as the
Full Spotbase.
When demonstrating or debugging the DVR, you can use the
DvrPlyCtrl parameter for basic transport functions. In Playlist mode,
this parameter only controls the active playlist. Upon power-up of the
DVR unit, the active playlist is the full spotbase.
Loop Recording
To enable loop recording, switch parameter RecMode to LoopRec .
When this is enabled, recording is only made to the available disk
space, not the whole disk space. The available disk space can be viewed
as a wrap-around tape. New video will be recorded onto the available
disk space over and over. Old recordings outside of the available disk
space won’t be deleted or recorded over. Once the recording is stopped,
the final video recorded is only as long as the available disk space. For
example, before the loop recording, if the available space is three hours
of video, after loop recording for 10 hours, when the recording is
stopped, the DVR-3901 will hold the only the last 3 hours of the
recording.
Frame Grabbing
Enable the Frame Grab feature by switching RecMode to FrameGrab .
When in this mode, every time the DVR receives a Record command, it
turns on recording status and grabs a single video frame. It appends this
frame to the current clip. When the DVR-3901 receives a Stop
command, the clip that contains individual frames is saved to disk.
Note
Use the On Screen display
(OSD) to view the current status
of the DVR. Do not use the
current state selected on the
DvrPlyCtrl card-edge control,
because this control does not
receive feedback of the current
status.