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220 / March 2000
O U T P U T M O D U L E
Output Module
(OMD-220)
Module Overview
Master output module handles the console’s Program, Auxiliary,
Audition and Utility outputs and outputs analog, digital signals and
meter output signals.
The OMD-220 module is the console’s central controller (CPU)
and digital signal processor (DSP).
The 220 Digital Audio console is provided with a serial interface
port, which is located on the lower DB-15 connector of the OMD-220
module (see connection diagrams for pin-outs and other details). This
serial interface is designed to provide a number of functions including
external control and set-up, system interface, etc. Through this serial
interface, the 220 console’s control protocol is available, allowing
visibility and control of the console switches and other functions. The
“Virtual Dip Switch” application program (supplied with the 220
console) communicates set up information through this serial interface
(see Chapter 6).
Each 220 console has two pairs of left-right digital VU meters:
PGM and SWT (switched) located on the console’s meterbridge. The
switched meter follows the SELECT switching, allowing the console
operator to meter AUD, AUX, and UTL.
The OMD-220 module houses the master CUE LED indicator.
Whenever Cue is activated anywhere on the console this LED will
illuminate and the CUE signal will automatically appear on the
switched VU meter pair. When cue is de-activated, the switched meter
pair goes back to it’s previously selected signal.
The OMD-220 module also generate the console’s monitor signals,
which feed the Control Room and Studio modules.
All user wiring to and from the OMD-220 module takes place at
DB-25 and DB-15 multi-pin connectors mounted on top of the module
and located underneath the hinged meterbridge. There are two DB-25
connectors: the left one handles analog outputs; the right one handles
digital outputs (AES format) and one DB-15 connector handles digital
control ports. All analog audio is +4dBu balanced. Pinout drawings on
pages 3-10 and 3-11 show all wiring connections at a glance.
OMD
OUT
ANALOG
OUT
DIGITAL
I/O
RS-232
RS-485
A
U
D
U
T
L
A
U
X
SWITCHED
VU
W# 026003A
LOC
REM
CUE