Rs-232 Connection; Surround Insert; Emergency Bypass Levels - QSC DCM series User Manual

Digital cinema monitor & crossover system

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amp with 3 surrounds and 4 subs). Now you can follow the rear panel text which shows both

channel position (L or C or R, etc) and the frequency output (LO, MID, HI, etc).

Connect the L-LO output to the correct amplifier driving the left positional speaker (and the low

frequency transducer), and L-HI to the amplifier driving the same speakers high frequency trans-

ducer, etc.

NOTE: There is no signal processing of the surround signal in a standard DCM-2 or DCM-3, how-

ever, the system is "Active Surround Ready". Please contact the QSC factory for more information.

WARNING: Incorrect frequency connections can damage tranducers. Physically verify proper

connections AND listen to each individual transducer at very low volume before applying full au-

dio power.

2. From Processor Output

This connection is from the cinema processor, and is the main input of all film sound into the DCM

unit. The 25 pin connector is an industry standard type and pinout, and will connect into your sys-

tem very easily. These cables are available from several cinema supply houses. Refer to Appen-

dix 1 for the pinout detail.

3. RS-232 Connection

This connects to the RS-232 serial port on an IBM compatible PC. All of the crossover functions

and many other features are able to be viewed and modified using Windows control software

which communicates to the DCM via this connection. Appendix 1 details the pinout of this cable.

The insert connector offers an extremely simple method of routing the surround signals out of the

DCM to an external processor box, and then back into the DCM for further routing and monitoring.

Appendix 1 details this cable.

5. Emergency Bypass Levels and Routing

These are used to adjust the passive crossover used by the Emergency Bypass feature. The signal

level of the passive crossover outputs sent from the DCM to the center channel amplifier can be

adjusted to best suit the center channel transducer sensitivities. The BYPASS CROSSOVER

MODE switch (DCM-2 and DCM-3 only) internally routes the Center channel input signal through

the 2-way passive crossover or the 3 way passive crossover. This signal path is only active if the

front panel Bypass switch is in the Emergency position.

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