Dolby Laboratories 430 - Manual (Page 4)

Signal Processing
Independent low- and high-frequency stages with
maximum noise suppression of approximately
16 and 18 dB, respectively
Signal Connection
3-pin XLR connectors for audio; 34-way ribbon
connector links processing module frames to power
supply/control unit; one 15-way D-connector con-
nects remote controls for all channels
Operating Controls
Operating controls for each channel of processing
are mounted on Cat. No. 429 Remote Control
module
Level: rotary control varies signal level in processing
circuitry over a ±6 dB range without changing
overall gain of unit
In/out: push-button with LED indicator switches
processing in and out of circuit
HF & LF: fader controls set attenuation of
unwanted low-level signals
Signal Levels
Nominal input and output level +4 dBr 1
Input Circuits
Electronically balanced, 20 k
Ω input impedance,
substantially resistive; common mode rejection
better than 55 dB, 50 Hz to 10 kHz; maximum
input level +27 dBr balanced, +21 dBr unbalanced
Output Circuits
Electronically balanced, approximately 20
Ω
output impedance; output balance better than 1 dB
into a symmetrical 600
Ω load; output float
2
better than –40 dB, 50 Hz to 1 kHz; maximum
signal level into 600
Ω or greater: +26 dBr balanced,
+20 dBr unbalanced; either leg of the output can be
grounded for unbalanced operation with no change
in level
Frequency Response
±1 dB 20 Hz to 20 kHz with LF and HF controls
set to 0
Crosstalk
Channel to channel within a single frame: better than
–94 dB 20 Hz to 20 kHz
Power Line Input
User-selected voltage ranges (50–60 Hz, single-
phase); nominally 100 V (85–110 V), 110 V
(102–132 V), 220 V (187–242 V),
240 V (204–264 V)
Size
Processor and power supply/control units: 44
× 483
mm (standard 1.75
× 19 inches rack mounting );
maximum projection behind mounting surface:
330 mm (13 inches) including connectors; remote
control panels: 150 mm x 39.5 mm (5.91
× 1.56
inches ); maximum projection behind control
surface: 100 mm (3.94 inches) including connec-
tors; may be console-mounted, mounting holes on
142.9 mm (5.63 inches) centers.
Weight
Model Weights (including remotes): 430-S1, 8 kg
(17.5 lb); 430-S2, 9 kg (19.6 lb); 430-S3, 12.9 kg
(28.3 lb); 430-S4, 14 kg (30.6 lb); 430-S5,
17.8 kg (39.2 lb); 430-S6, 18.8 kg (41.4 lb)
Accessories
430SU1: single-channel upgrade package with
one channel module, one remote control and rack
mounting frame with blanking plate.
430SU2: two-channel upgrade package with two
channel modules, two remote controls and rack
mounting frame.
430SK1: single-channel upgrade package with one
processing module and one remote control only (no
frame included).
Cat. No. 428: remote housing for up to three
Cat. No. 429 remote controls.
Regulatory Notices
US: This unit is UL listed.
Europe: The 230 Volt unit complies with the
requirements of Low Voltage Directive 73/23/EEC.
Warranty
One-year limited, parts and labor
1 0 dBr = 0.775 mV
2 Output float is the level across a balanced load relative to an interfering
signal injected at one end of the load
Specifications subject to change without notice.
Dolby and the double-D symbol are trademarks of Dolby Laboratories.
© 2000 Dolby Laboratories, Inc. S00/00000
430 S
PECIFICATIONS
DISCLAIMER OF WARRANTIES:
Equipment manufactured by Dolby
Laboratories is warranted against
defects in materials and workmanship
for a period of one year from the date of
purchase. There are no other express
or implied warranties and no warranty
of merchantability or fitness for a partic-
ular purpose.
LIMITATION OF LIABILITY: It is
understood and agreed that Dolby
Laboratories’ liability whether in con-
tract, in tort, under any warranty, in neg-
ligence or otherwise shall not exceed the
cost of repair or replacement of the
defective components and under no cir-
cumstances shall Dolby Laboratories be
liable for incidental, special, direct, indi-
rect or consequential damages (includ-
ing but not limited to damage to soft-
ware or recorded audio or visual mater-
ial), or loss of use, revenue or profit even
if Dolby Laboratories or its agents have
been advised, orally or in writing, of the
possibility of such damages.
D
OLBY
N
OISE
R
EDUCTION
Dolby noise reduction is a family of
signal processes that reduce the noise
inherent in analog recording media,
without affecting the sound being
recorded. While they differ in perfor-
mance and details of operation, all
Dolby NR systems are complementary
processes that first encode the music
when it is recorded, then decode it
when it is played back. They also treat
soft signals separately from loud ones,
and vary the NR action with frequency
to avoid the side effects typical of other
systems.
Dolby A-type noise reduction, intro-
duced in 1965, was originally intended
for use by professional recording studios
to make quieter master tape recordings.
In the early 1970s its use was extended
to film studios and motion picture
release prints to make films sound
better.
Dolby SR (spectral recording), intro-
duced in 1986, was designed not only to
provide more noise reduction than
A-type, but also to enable analog master
recordings that equal or surpass 16-bit
digital recordings with respect to overall
dynamic range. Today, analog with
Dolby SR is still a preferred format for
some musicians, producers, and record-
ing and mastering facilities, and is the
standard format for the analog sound-
tracks of virtually all feature films.
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