Test Jacks; Emergency Bypass; Rear Panel Features; Amplifier Dataports - QSC DCM series User Manual

Digital cinema monitor & crossover system

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will NOT cause the fault LED to light, the unit must be driven by real-world input signals and the

fault must persist for several minutes!

4. Test Jacks

The Test jacks give you access to any of the signals being sent to the front panel speaker (before

the gain potentiometer). These signal levels are at the exact same level as the cinema processor

output signals (unity gain) and can be used as a test point for system calibration.

This is an extremely powerful feature. If there should ever be a problem with the DCM or system

cabling, you have the ability to bypass all of the DCM active circuitry and get sound to the center

channel.

In the NORMAL position, the DCM performs normal monitor and crossover functions. In the

EMERGENCY position, the PROC center channel signal is routed to a passive crossover (no power

is required), and then to the center channel amplifier. In the EMERGENCY position, all amplifiers

except the center channel amplifier are put in Standby mode. There are level adjustments on the

rear panel for balancing the high frequency and low frequency output level.

WARNING: Connecting improper frequencies can damage your speakers.

B. Rear Panel Features

The DCM uses mass termination connectors which makes a QSC cinema sound system extremely easy

to wire together.

One QSC amplifier DataPort includes all connections required to send two channels of audio from

the DCM to the amplifier input circuitry, and current and voltage information back from the two

speaker terminal outputs. Also included on this connector is remote on/standby pin which allows

the DCM to act as a master system power controller.

Computer industry VGA-style cables can be used to connect between the DCM and QSC amplifi-

ers. However, make sure that your cable passes ALL connections between the two 15 pin connec-

tors. See Appendix 1 for pinout information. Contact QSC if you would like to purchase specially

made cables.

The maximum output configuration on the DCM-1 is a 6 ch / 2-way, the maximum DCM-2 is a 6 ch

/ 3-way, and the maximum output configuration on the DCM-3 is a 8 ch / 3 way. In addition,

many parallel outputs (with separate processing) are included for additional theater configuration

flexibility.

The rear panel labelling on the DCM has all of the information required by an audio installer.

When starting, write down the EXACT SPEAKER CONFIGURATION (for example, 8 channel, Tri-

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