User`s manual

Alcorn McBride Digital Video Machine DVM-7400 User’s Manual Rev 1.5

Dolby Digital 5.1 Surround Sound

The DVM supports output of Dolby Digital 5.1 Surround Sound bitstreams as well as

standard 2 channel MPEG audio. The DVM will automatically detect which type of

stream is present in the MPEG file, and output the audio accordingly.

NOTE: The DVM will NOT down-mix AC3 audio streams. Whenever a Dolby Digital

bitstream is present in an MPEG clip, the analog audio outputs of the DVM are

disabled.

DVM Hardware Requirements

The DVM7400/P, DVM7400/D, and the DVM7400/B are capable of outputting a Dolby

Digital 5.1 Surround Sound encoded bitstream on the digital audio output on the rear

of the option module. To decode the bitstream you will need an external Dolby Digital

decoder.

Compact Flash Media

The Digital Video Machine can use almost any ATA compatible Compact Flash

media. There are some manufacturers of ATA Compact Flash that Alcorn McBride

has identified to be more compatible than others. For a complete list of preferred

manufacturers, please visit the Knowledge Base on the Alcorn McBride website at

http://www.alcorn.com/kb/index.html.

Formatting the Compact Flash

Note: Formatting the

Compact Flash will

result in a loss of all

data. Make sure you

to backup any data

beforehand!

You should always format a new Compact Flash card in the DVM before using it.

The card that comes with your DVM has already been formatted and contains a

sample MPEG file so it is not necessary to reformat it. If you have enough space on

the card, it is best to keep the sample video (rename it if necessary) so you can use it

as a reference. If you don’t have enough room for the sample video and your video,

you can copy the sample video off to your PC hard drive to keep it, then delete it from

the Compact Flash card.

The easiest way to format the Compact Flash is to power on the DVM, hold down the

test button, and then insert the Compact Flash card into the unit. You can release

the test button when the LED turns orange. When the LED flashes green and then

remains off, the format is complete. This operation varies in duration based on media

size and type. It can take anywhere from 1-60 seconds to format the card

There is also a remote command that can be used to format the card. When using

the command, the LED will turn orange, flash green, and then turn off when the

format is complete.

Please refer to the Command Protocol section for specific details about the format

command.