QSC DCM-1 User Manual page 26

INSTALLATION-
SURROUND INSERT CONNECTION
Surround insert connections are provided for
connection to a Dolby Surround Processor. The
surround insert connections are made using the
TO SURROUND EX DECODER connection.
Connect a cable between this connector and an
external processor such as the Dolby SA-10.
Signals will be routed out of the DCM to the
processor and back into the DCM for output to the
amplifiers.
TO SURROUND EX DECODER Pinout-
Configuration (typical): 9-pin SubD female on DCM end to
loose wires attaching to surround processor's terminal strip
inputs and outputs
Pin# Signal Description
1 Surround Left Send
2 Surround Right Send
3 Signal Ground
4 Surround Left Return
5 Surround Right Return
6 Signal Ground
7 Signal Ground
8 Surround Back Left Return
9 Surround Back Right Return
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Connections: Surround Insert
DCM-1 Surround Insert Connector
and Selector Switch
DCM-2 and -3 Surround Insert Connector