Multichannel Audio Converter

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 11outputs 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 11digital 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.