User`s manual

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

Ethernet Control

If your Digital Video Machine is equipped with the optional Ethernet feature, you can

control the DVM using a standard Ethernet Protocol called UDP (User Datagram

Protocol).

UDP is a very simple Ethernet protocol that allows an Ethernet device to transmit a

generic string of data to another Ethernet device. Since UDP is such a broad

standard, UDP packets can be generated by a large variety of controllers and PC

applications. The UDP packet handles all of the complexities of getting the message

where it needs to go in one piece. The good news is that you do not have to

understand those complexities. As a matter of fact, you only need to know the

following information to send a UDP message.

1. Destination IP Address – This needs to be the IP address of the DVM

you intend to control. The default IP address of the DVM is

192.168.0.254.

2. Destination Port – This value needs to be the UDP port that the DVM

is listening to for UDP commands. This value is always 2638.

3. Source Port - This is the UDP port that your PC or controller will use

to send the UDP message. It does not matter what port you choose,

as long as it is a valid UDP port. If you have no idea what a valid UDP

port is, just use 2638.

4. Data – This is the actual message that you are sending to the DVM.

This message needs to be a Command Protocol message (ie.

1PL<CR>).

All UDP commands are ASCII based, and are terminated with a carriage return

(hexadecimal value 0x0D). The complete list of supported commands can be found

in the Command Protocol section.

For your convenience, Alcorn McBride distributes an application called AMI

Terminal, which allows you to control the DVM using UDP with the click of a button.

This free application can be obtained at

http://www.alcorn.com.