Operating instructions

ii
About The Dolby CP45
Once installed, the Dolby CP45 Cinema Processor becomes the heart of your
theatre sound system. All sound sources are connected to the CP45, which
processes their signals appropriately and feeds them to the power amplifiers.
The Dolby Model CP45 provides the high performance for which all processors
manufactured by Dolby Laboratories are known in a new cost-effective,
integrated design. Its many features include a stereo optical preamp with
precise slit-loss correction, processing for both Dolby A-type and Dolby SR
soundtracks, an advanced 2:4-channel decoder, and multi-band screen speaker
equalization. These advanced circuits ensure accurate reproduction of all films
with Dolby analog soundtracks, and permit the theatre to use the widely-
respected name “Dolby” on the marquee and in advertising to identify presenta-
tions of Dolby releases.
Additional standard features of the CP45 are a built-in fader with remote
facilities, simple push-button soundtrack format selection, and comprehensive
fail-safe features that include a built-in bypass system. The unit also interfaces
readily with theatre automation systems.
The CP45 supports the following sound formats:
Format Number
Mono 01
Dolby A-type (stereo) 04
Dolby SR (stereo) 05
Non sync 1 60
Non sync 2 / Aux 61
Microphone 64
About This Manual
This Users’ Manual has been prepared specifically to help projectionists get the
most from the Model CP45 and the theatre sound system once it has been
installed and aligned. (Installation and alignment instructions are supplied to
the local distributor or installation company). We suggest that you keep this
manual readily available.
The manual is organized as follows:
• Section 1, Operating Instructions, covers the basic control functions
and operation of the CP45.
• Section 2, Maintenance and Adjustments, contains tips for
maintaining the CP45 and the theatre sound system.