Hearing Impaired Connection; Powered Subwoofer Connection; Surround Insert Connection; System Calibration (Typical) - QSC DCM series User Manual

Digital cinema monitor & crossover system

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It is recommended that you purchase a standard 25 pin cable from any of the well known cinema

industry cable suppliers.

6. Impaired Hearing Connection

The Hearing Impaired output signal is available on the screw terminal connector on the rear of the

DCM. This signal is unbalanced (the "+" label is the "hot", and the "-" label is a ground refer-

ence). The output signal is similar to levels that are output from a standard CD player.

Screw terminal connections make it possible to send a balanced signal to a powered subwoofer.

This signal is balanced and the circuitry is designed for long cable runs from the projection booth

to the theater screen. The high-pass filtering and level adjustments are done by the DCM unit.

NOTE: There will be no fault analysis or output audio monitoring available for the sub channel

signal if this connection is used.

Connect a cable between this connector and an external processor box such as the Dolby SA-10.

Signals will be routed out of the DCM to the processor box and back into the DCM for output to

the amplifiers (via the proper DataPorts). The pinout of the cable is shown in Appendix 1.

B. System Calibration (typical)

When installing a typical cinema sound system, most of the calibration involves the cinema processor.

Refer to the user manual for the brand and model cinema processor that you are using.

WARNING: Turn the volume knob on all of the QSC amplifiers all the way down until crossover set-

tings and levels are verified!

Concerning the DCM portion of the installation, you need to start by connecting the cinema processor

and amplifier cables. Connect a PC computer to the RS232 connector, turn on the DCM unit, load the

DCM Commander PC software and either load a full configuration file (if this theater uses the exact

same settings as another theater), or select and enter all of the data in the Configuration section of the

DCM Commander software.

The General Configuration and Amp & Speaker Configuration parameters must all be set correct-

ly for the system to function properly.

If all system and crossover settings look correct in the DCM Commander software, you are ready to

start calibration.

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Troubleshooting