User`s manual

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

Set Relay Outputs

Description: This command allows you to manually control the 2 relay outputs on the DVM’s

Parallel control connector.

Command Bytes: <Code>RL

Parameters: <Code> is one or more characters that define which relay to control, and what state it

should be in. The available codes are:

1P = Turns ON Play Relay

0P = Turns OFF Play Relay

1F = Turns ON Fault Relay

0F = Turns OFF Fault Relay

X = Returns Relays to default Play/Fault operation

Comments: Once a relay is manually set or cleared, it will no longer resume it’s default operation.

For example, the Play relay will no longer turn on and off automatically depending on

the playback mode. The relays will remain in the commanded state until they are

changed manually once again, or until the X parameter is used to return them to

default operation

Message Response: R

Examples: Turn ON Play Relay 1PRL

Turn OFF Fault Relay: 0FRL

Return Relays to default operation: XRL

Set On-Screen Display (OSD)

Description: This command causes the DVM to display one of several available On-Screen

diagnostic displays. These displays contain a great deal of information that can be

used to verify configuration as well as troubleshoot problems.

Command Bytes: nOS

Parameters: n is a number between 0 and 4 that represents the OSD to be displayed. The

available OSD screens are as follows:

0 = OSD OFF (Normal Operation)

1 = Display System Configuration Screen

2 = Display Video Information Screen

3 = Display Audio Information Screen

4 = Display Activity Log

Comments: The OSD screens are translucent, so the video is still visible in the background.

Message Response: R

Examples: Display Activity Log: 4OS

Turn OFF OSD: 0OS