Dolby
®
Model CP650 Installation Manual
1-1
Chapter 1
Introduction
1.1
About the Dolby CP650 Digital Cinema
Processor
The Dolby CP650 Digital Cinema Processor is a self-contained, all-digital cinema
processor capable of supporting Dolby
®
Digital, Dolby Digital Surround EX
TM
, Dolby
SR, Dolby A-type, and Academy mono film sound playback.
The CP650 provides inputs for two projector soundheads (both analog and digital), an
external six-channel processor, two nonsync sources, and a PA microphone. Its audio
outputs are balanced, with a multipin connector configured to the THX standard. The
CP650 is the first cinema processor to incorporate an Ethernet connection, enabling
theatre personnel to monitor the unit’s functions remotely from a PC.
For decoding analog soundtracks, the CP650’s state-of-the art design incorporates the
only digital implementations of Dolby A-type and Dolby SR decoding that meet
Dolby Laboratories’ own rigorous standards. Reductions in the cost of powerful
digital signal processing (DSP) circuitry have made it possible for the first time to
replace the analog circuitry previously necessary for the accurate reproduction of
A-type and SR soundtracks.
An easy-to-read LCD screen, plus simple front-panel format selection and control
buttons, makes it easy to install, operate, and maintain the CP650. Installation is
further simplified by built-in test instrumentation that includes a real-time analyzer.
Third-octave equalization, plus bass and treble trim controls, are provided for up to
seven channels (Left, Center, Right, Left Surround, Right Surround, Back Surround
Left, and Back Surround Right). A digital parametric equalizer is provided for
subwoofer equalization.
Easily programmed internal software manages most existing or likely future formats.
While an external PC is not required for setup, a full-featured software package is
available in several languages to facilitate the setup process. A serial connector for a
PC, an input for a calibration microphone multiplexer, and a variety of test points are
all accessible behind an access door on the front-panel. Built-in diagnostic software
runs automatically whenever the CP650 is turned on.
Calibration settings for a given theatre can be stored on a PC, and, if necessary,
transferred directly to another CP650, or other modules, minimizing the need for
additional calibration after repairs. As improvements to the CP650 digital control and
processing software are developed, the latest revisions will be downloadable from a
PC to the CP650. Updates to the digital processing used for Dolby Digital
soundtracks are included from time to time on Dolby Digital release prints, and
