DOLBY DA20
Digital Film Sound
Adaptor
Specifications
DA20 DIGITAL
FILM SOUND ADAPTOR
INPUTS
DIGITAL SOUNDHEAD
Inputs for up to two Dolby Cat. No. 699/700
Digital Soundheads or comparable inboard readers.
AUDIO
For
use with Dolby CP200 Cinema Processors (separate input not required for
CP65 and CP55).
MOTOR
START
Two control inputs
detect motor start signals from projectors 1 and 2.
PROJECTOR
CHANGEOVER
Single input.
Ground to select projector 2, open for projector 1.
OUTPUTS
AUDIO
Left, Center, Right, Left Surround, Right
Surround, Mono Surround and Subwoofer (L, C, R, LS, RS, S and SW).
AUXILIARY
DATA PORT
RS-232 standard 8 bit data available.
CINEMA
PROCESSOR INTERFACE
Format Control inputs
and outputs connect via specific cables to the Dolby CP65, CP200 or CP55, sensing the currently selected
format and providing automatic switching as required.
FRONT
PANEL INDICATORS
SIGNAL PRESENT
One LED per channel indicates that a signal
level above -40 dB is present at the analog output of the DA20.
SR•D DIGITAL
Indicates that valid digital data is being
processed.
SR•D ANALOG
Indicates that the system has selected Dolby
Stereo SR (analog) operation.
MOTOR 1/MOTOR 2
Indicates "motor running" signals used for changeover.
PROJECTOR
CHANGEOVER
Indicates the
status of the changeover control lines.
POWER
SUPPLY
+15 V, -15 V and +5
V.
DATA
STATUS
Numeric LED display
indicates data recovery efficiency from digital print.
SIGNAL
LEVEL
Four-LED display
indicates digital audio signal level for each channel.
DA20 INTERNAL
CONTROLS
SYSTEM
DELAY
Three rotary switches
set time delay to achieve synchronization of sound with picture through
different mounting positions for digital soundhead. Adjustable from 4 to 132
frames (16 to 528 perforations) in 1/4-frame increments.
SURROUND
DELAY
Single rotary switch
sets delay for left and right surround channels. 0-140 ms adjustable in 10 ms
increments.
CINEMA
PROCESSOR TYPE
Selects format protocol and
signal switching for Dolby CP65, CP200, or CP55.
DA20 SYSTEM
SPECIFICATIONS
OUTPUT
LEVEL
300 mV for Dolby
Level (20 dB below maximum modulation) to match Dolby Cinema Processors.
FREQUENCY
RESPONSE
L, C, R, LS, RS,
S: 20 Hz to 20 kHz +/- 0.5 dB. SW: 20 Hz to 120 Hz +/-0.5 dB.
NOISE
LEVEL
More than 72 dB
CCIR/ARM below Dolby level at DA20 outputs.
MAXIMUM
OUTPUT
20 dB above Dolby
level.
DYNAMIC
RANGE
92 dB.
PROJECTOR
SPEED TOLERANCE
23 - 26 frames/second, nominal.
CONSTRUCTION
All plug-in modules are constructed using
printed circuit cards, 96-way DIN connectors. Conforms to FCC class A EMI
specification.
DIMENSIONS
3 units high, rack mounting; 129 x 283 mm (5.25 in. x 19 in.). Maximum
projection behind mounting surface 362 mm (14.25 in.).
SHIPPING
WEIGHT
9 kg (20 lb.).
POWER
REQUIREMENTS
85 to 265 VAC,
50 - 60 Hz.
POWER
CONSUMPTION
Maximum 100
Watts; typical 60 Watts.
AMBIENT
OPERATING TEMPERATURE
Up to 40 degrees C.
CAT.
NO. 700
DIGITAL SOUNDHEAD
SIZE
152.4
mm h. x 101.6 mm d. x 254 mm w. (6 in. x 4 in. x 10 in.).
SHIPPING
WEIGHT
10.5 kg (24 lb.).
POWER
REQUIREMENTS
Exciter lamp
requires approximately 3.5 A at 10 V, provided by integral exciter lamp power
supply. 85 to 264 VAC; 50 - 60 Hz.
POWER
CONSUMPTION
Maximum 100
Watts; typical 60 Watts.
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