Alcorn Mcbride Digital Video Machine 4, User Manual

Page: 25 / 84

Detailed Command Summary 17
Video Aspect Ratio
Description: This command causes the Digital Video Machine 4 to switch the video aspect
ratio setting of the designated channel. This may be useful for displaying
letterbox material, or displaying material on a wide-screen monitor. This setting
will be stored permanently in the DVM4’s configuration.
Command bytes: [<ID>@]ncVA<CR>
where n is 0 (4:3 Normal) , 1 (4:3 Pan Scan), 2 (4:3 Letterbox), 3 (16:9 Normal),
4 (16:9 H-Center), 5 (16:9 V-Center).
Message Response: R<CR>
Image Control
Description: This command causes the Digital Video Machine 4 to mute or unmute the
overlay graphics. This includes the currently displayed Banner or Image.
Command bytes: [<ID>@]cIM<CR>
where n is 0 (Transparent) or 1 (Visible).
Message Response: R<CR>
Image Location
Description: This command causes the Digital Video Machine 4 to change the location where
the image is displayed. You may place the image in 1 of the four corners, or
have the image rotate to avoid screen burn.
Command bytes: [<ID>@]<Location>cIL<CR>
where <Location> is TL (Top-Left), TR (Top-Right), BR (Bottom-Right), BL
(Bottom-Left), or RO(Rotate).
Message Response: R<CR>
Examples: Set channel 1 image to Top-Right: TR1IL<CR>
Banner Text
Description: This command will dynamically create a banner and display it on the designated
channel. To distinguish between lines, you can insert the string ‘\n’.
Command bytes: [<ID>@]<Text>cBT<CR>
Message Response: R<CR>
Examples: Display message on one line: Hello World!1<CR>
Multiple lines: Hello\nWorld!1<CR>