Multichannel Audio Converter
Source: Dolby Laboratories, Inc.
The Model 587 Multichannel Audio Converter
combines eight channels of 24-bit analog-to-digital
The Model 587 Multichannel Audio Converter
combines eight channels of 24-bit analog-to-digital
conversion and eight channels of 24-bit digital-to-analog
conversion in a compact 2-U rack-mount
enclosure. An elegant linear power supply uses
careful filtering coupled with multiple stages of
regulation to provide clean, isolated power to each
section of the unit. An internal low-speed, low-noise
fan is provided to allow the Model 587 to be
installed in virtually any environment. Both of
these features help to ensure consistent high
performance and long product life.
The analog-to-digital section of the Model 587
uses custom, high-performance 24-bit converter
modules that can operate at any sample rate
between 30 and 50 kHz via the unit's AES black
external reference input. When no sync signal is
present, the unit mutes this input to prevent false
clocking and uses its internal low-jitter crystal
oscillator for asynchronous operation at 48 kHz.
Balanced audio is input via eight female 3-pin XLR
connectors on the rear panel. Dolby standard
double-green LED indicators provide simple and
accurate alignment of reference levels. AES/EBU
11outputs are provided via three male 3-pin
XLR connectors on the rear panel.
The digital-to-analog section also uses custom,
high-performance 24-bit converter modules
capable of operating at any sample rate between
30.08 and 55 kHz. Each module is independently
clocked from its respective AES/EBU 11digital
input, provided by three female 3-pin XLR
connectors on the rear panel. Front-panel LEDs
indicate when each module is locked to the
incoming AES stream. Balanced audio is output
via eight male 3-pin XLR connectors on the rear
panel.
Dolby Laboratories, Inc., 100 Potrero Avenue, San Francisco, CA 94103-4813. Tel: 415-558-0200; Fax: 415-863-1373.
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