Dolby Laboratories CP650 User Manual download pdf (Page 7)

Dolby

CP650 Digital Cinema Processor User’s Manual

1-1

Chapter 1

Introduction

The Dolby

CP650 Digital Cinema Processor is the heart of your theatre sound

system. All sound sources are connected to the CP650, which processes the signals

appropriately and feeds them to the power amplifiers. Entirely self contained, the

CP650 provides both Dolby Digital and Dolby analog processing. An easy-to-read

front-panel screen and uncomplicated front-panel buttons make it simple to operate.

Software that can be readily programmed controls all existing film sound formats.

Calibration settings for a given theatre can be stored on a PC and, if necessary,

transferred directly to another CP650, reducing or eliminating the need for

recalibration after repairs. As improvements to the CP650’s digital control and

processing software are developed, the latest revisions can be downloaded from a PC

to the CP650 hardware. Moreover, updates to the audio coding used for Dolby Digital

soundtracks, which are included from time to time right on Dolby Digital release

prints, download automatically into the CP650 the first time such a print is played in

the cinema.

The CP650 was installed and adjusted initially by a trained engineer so that your

theatre would have the same standard playback characteristics as the dubbing theatres

in which all Dolby films are mixed. This results in the most accurate sound

reproduction possible. Do not attempt to adjust any controls within the CP650 except

those specified in this manual. Adjusting internal controls requires special test

equipment. Tampering with these controls can have an adverse effect on the sound in

your theatre and will require a service call to restore proper operation. The first thing

to do when you have a problem is to read Chapter 4.

In addition, do not adjust any of the preset controls on the other audio equipment in

your theatre sound system. Misadjusting the power amplifier gain controls, for

example, can cause channel imbalance and too much power amplifier noise. Those

controls have been set by the installer for correct channel balance. The play level

should be correct in the theatre with the front-panel fader reading 7.0.

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Dolby Laboratories CP650 User Manual Page 7