Specifications

1-2
CP500-SR
• Dolby A-type and SR analog soundtrack decoding capability
• Upgradable to Dolby Digital decoding by means of plug-in circuit cards
CP500-70
• Dolby Digital decoding capability
• Dolby A-type and SR analog soundtrack decoding capability
• 70mm magnetic soundtrack capability (includes a 6 channel A/D module
and 4 additional channels of Dolby A-Type noise reduction for use with
an external magnetic pre-amp); can play Formats 42 and 43
Any CP500 configuration also interfaces readily with other film sound equipment.
1.3 About This Manual
This manual is intended to be used by individuals who are qualified in the area of
cinema sound equipment installation and service. The basic day-to-day operation of
the CP500 is covered in the CP500 Users' Manual, Dolby part number 91372.
This installation and alignment manual covers the procedures necessary to ensure
that the theater sound system is accurately aligned to standards that have been
established by Dolby Laboratories. Following these procedures will ensure that the
theater sound system will accurately reproduce the soundtrack as the director and
sound mixers intended.
The Dolby CP500 is the central element of the theater sound system. The projector,
the Dolby Processor, the power amplifiers and the loudspeakers, as well as the
auditorium itself, must all be considered when aligning the system for optimum
performance.
The system alignment procedure is divided into two parts. The B-chain alignment
includes the equalization, loudspeaker crossover, and output level adjustments, in
addition to the regulation of miscellaneous functions, such as fade-out time
adjustment. The A-chain alignment involves adjustments made to the projector
soundhead optics, solar cell, and optical preamplifier card.