DOLBY CP45
Cinema Processor
Specifications
CONSTRUCTION
Rack-mount chassis frame construction with plug-in modules accessible behind hinged front panel.
SIGNAL CONNECTIONS
Output Control
Standard pluggable screw-type terminal blocks for audio signals and control connections for projector changeover.
Mating halves supplied for each terminal block.
Automation connections via 15-way D-type connector.
Power supplied via two outboard transformers (one main, one bypass).
Signal Inputs
Optical: two pairs of balanced inputs for two projectors with stereo solar cells (available from Dolby Laboratories mounted on brackets for most projector types).
Digital/Magnetic/Aux.: six-channel input for use with external magnetic preamplifier, digital adapter, or auxiliary source, 300 mV operating level.
Non sync: one pair of inputs for stereo non sync source, 10 k nominal input impedance, 30 mV maximum input sensitivity. 2:4 decoder may be used to generate ambient information for surround speakers with stereo non sync sources.
Mic input: for dynamic microphone, 1 k nominal input impedance.
Signal Outputs
150 ohm output impedance will drive any load greater than 600 ohms.
Maximum output level, 2 V rms. Typical operating level, 100 mV. Operating levels from 10 mV to 200 mV may be accommodated.
Output for hearing-impaired
Center-weighted sum of L, C, R for connection to auxiliary system for the hearing-impaired.
Output impedance 2.5 k ohms.
OPTICAL PREAMPLIFIER
Cat. No. 510 stereo preamplifier for two projectors equipped with stereo solar cells. Adjustable slit-loss equalization circuitry for flat response from virtually any type of optical sound head.
NOISE REDUCTION (Cat. No. 222 SR/A)
Two channels each for Dolby A-type and Dolby SR soundtracks.
Four-channel decoder
Cat. No. 511 2:4 decoder derives left, center, right and surround channels from two tracks on Dolby Stereo optical prints. Incorporates modified Dolby B-type noise reduction and 10 ms-150 ms adjustable delay line to optimize front-to-back surround separation.
LOUDSPEAKER EQUALIZATION
Cat. No. 513 equalizers for left, center, and right screen speakers provide ±10 dB high- and low-frequency controls with adjustable turnover frequency, plus seven adjustable ±8 dB narrowband filters covering the range from 63 Hz to 2 kHz. Adjusted by trained installers to achieve standardized Dolby cinema playback response.
Surround equalizer provides bass, mid-frequency, and treble adjustments for left and right surround channels.
50 or 100 Hz low-pass filter for subwoofer channel.
NOISE LEVEL
Typically -65 dB (CCIR/ARM weighted) referenced to Dolby level.
DISTORTION
Any channel, 1 kHz: typically less than 0.15 % at Dolby level (50 % modulation).
AMBIENT OPERATING TEMPERATURE
Up to 40 degrees C.
DIMENSIONS
3 U, 19" rack mount chassis: 133 x 483 mm (5.25" x 19").
Maximum projection behind mounting surface: 308 mm (12.1").
Maximum projection in front of mounting surface: 40 mm (1.6").
WEIGHT
10.1 kgs (22.3 lbs).
POWER REQUIREMENTS
Normal supply 24 VAC at 1 A
Bypass supply 24 VAC at 200 mA
FUSE REQUIREMENTS
One slow-blow fuse: 20 mm, 1.5 A.
Spare fuse provided.
OPTIONS
Cat. No. 515 second surround channel module.
Cat. No. 516 remote fader.
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