User`s manual

Alcorn McBride Digital Video Machine DVM-7400 User’s Manual Rev 1.5
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Still
Description: This command causes the DVM to still frame. Playback will resume from this position
when another Play command is issued. Because the video image is held in a digital
buffer, the still frame will be rock solid, and may be held indefinitely without media
wear.
Command bytes: ST
Message Response: R
Comments: If a Select File or Play File command is issued while in Still mode, it will no longer be
possible to resume playback from the stilled point.
Pause
Description: This command functions exactly like the Still command except it causes the video
output to display black. When a Play command is received, playback will resume and
the video output will be restored.
Command bytes: PA
Message Response: R
Comments: If a Select File or Play File command is issued while in Pause mode, it will no longer
be possible to resume playback from the stilled position.
Stop
Description: This command causes the DVM to stop video playback. The last frame displayed will
remain on screen. If a playlist is in progress, this command will cause the playlist to
abort.
Command bytes: RJ
Message Response: R
Comments: Once a Stop command has been issued, the only way to start video playback again is
to issue a Select File or Play File command.
Audio Control
Description: This command can be used mute and unmute the audio, as well as adjust volume.
Command bytes: nAD or mmm%AD
Parameters: n is 0 (Mute) or 1 (Unmute).
mmm is an ASCII number between 0-100 representing volume level
Message Response: R
Comments: Whenever the volume level is changed, the DVM remembers this setting even after
power is lost. Remember that the volume level set using this command is limited by
the level set using the Volume Control knob on the rear-panel of the DVM.
Examples: Mute Audio: 0AD