Extron electronic Extron Electronics Music Mixer DMP 44 LC User Manual

The DMP 44 LC has a front panel USB port that can be connected to a host device such as 
a computer running the HyperTerminal utility, DSP Configurator, or the DataViewer utility.  
The port makes serial control of the DMP possible. After the connection is established, 
see “

” later in this section for SIS programming 

details.    

The DMP 44 LC initiates messages under specific conditions. No response is required from 
the host. The DMP 44 LC-initiated messages are listed here (underlined).

© Copyright 2011, Extron Electronics, DMP 44 LC, Vn.nn, 60-1095-01 
 
Vn.nn is the firmware version number.
 
The DMP 44 LC sends the boot and copyright messages under the following circumstance: 
If the DMP 44 LC is off and an RS-232 connection is already set up (the PC is cabled to 
the DMP 44 LC and a serial communication program such as HyperTerminal is open), the 
connected unit sends these messages via RS-232 when first powered on.

SIS commands consist of a string (one or more characters per command field). No special 
characters are required to begin or end a command sequence. When the DMP 44 LC 
determines a command is valid, it executes the command and sends a response to the 
host device. All responses end with a carriage return and a line feed (CR/LF = ]), signaling 
the end of the response character string.
When programming, certain characters are more conveniently represented by their 
hexadecimal rather than ASCII values. The following table shows the hexadecimal 
equivalent of each ASCII character: 
 

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