Specifications

3-11
Contains Microprocessor.
Controls front panel display and controls.
Contains interface for remotes and automation equipment.
Cat. No. 683 Crossover Card (Optional)
Provides active high- and low-pass filters on L, C, and R signals for bi-amplified
installations.
Provides low frequency surround channel outputs.
Provides low frequency delay for time alignment of L, C, and R low frequency
drivers.
Contains bypass crossover and must be present for bypass operation in bi-amplified
systems.
Dolby Digital Soundtrack Processing System
Cat. No. 670 Video Front-end Card
Digitizes the video data received from the film soundtrack reader.
Cat. No. 671 DSP Cards (2)
Processes the digitized video data and extracts the AC-3 bitstream.
Cat. No. 673 System Services Card
Contains the operating software.
Cat. No. 675A Digital Signal Processing Card
This additional Cat. No. 675A provides Dolby AC3 decoding.
Cat. No. 680 Bit Rate Converter Card
Converts PCM audio from the variable projector rate clock to a stable PCM
audio sample rate.
Model CP500-D/300
Contains the same boards as the CP500-D above, except Cat. No. 300 modules are
used in place of the Cat. No. 222SR/A modules. A Cat. No. 668 Adapter Card is
required. Used primarily in preview theaters and studios.
Model CP500-SR
Contains the same boards as the CP500-D above except without the Dolby Digital
soundtrack processing system cards.
Model CP500-70
Contains the same boards as the CP500-D, and additionally:
Cat. No. 222A Modules (2)
Provides four additional channels of Dolby A-type noise reduction bringing the total
number of noise reduced channels to six.
Cat. No. 669 Adapter Card
Used for installing the two Cat. No. 222A cards above.
Cat. No. 685 6-Channel Analog to Digital Converter Card
Used for external 6-channel analog inputs.