DigiDesign 96 I/O Руководство - Страница 12

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DigiDesign 96 I/O Руководство
S/PDIF Digital In and Out
These are unbalanced RCA jacks that accept and
output a stereo S/PDIF digital data stream.
S/PDIF supports up to 24-bit audio, at sample
rates up to 96 kHz.
To maintain data integrity and minimize
jitter, use only 75-ohm coaxial cable for
S/PDIF connections.
Loop Sync In and Out
Loop Sync is a dedicated clock signal for syn-
chronizing multiple Pro Tools|HD peripherals
together. Loop Sync uses a Word clock signal
based on sample rates of either 44.1 kHz or
48 kHz. As sample rate increases in the system,
Loop Sync continues to operate at a base rate of
44.1 kHz or 48 kHz, depending upon the higher
rate.
The Loop Sync In and Out ports are standard
BNC connectors that output a 1x Word clock
signal. Loop Sync should only be used to chain
multiple Pro Tools|HD peripherals together (au-
dio interfaces and the Digidesign SYNC HD™ or
SYNC I/O™).
For more information on Loop Sync and its con-
nection requirements, see the HD Setup Guide.
Optical (ADAT) In and Out
The Optical ports accept up to eight channels of
Optical (ADAT) input and output, or two chan-
nels (stereo) optical S/PDIF input and output.
Optical (ADAT) mode supports sample rates up
to 48 kHz. In TOS-Link mode, the 96 I/O sup-
ports two-channel Optical input and output at
sample rates up to 96 kHz.
8
96 I/O Guide
About Lightpipe-Compatible Devices
Lightpipe is an industry standard, eight-channel
optical digital audio connection created by Ale-
sis. Lightpipe is found on many devices, includ-
ing Optical (ADAT) decks, modular digital
multitracks (MDMs), sound cards, A/D or D/A
converters, and digital consoles.
EXT. CLOCK In and Out
The External Clock In and Out ports are stan-
dard BNC connectors that receive and output a
Word clock signal. These ports can be used to
synchronize the 96 I/O to any device that re-
quires (or provides) word clock.
External Clock In and Out are configured in the
Hardware Setup dialog.
Because the Loop Sync and Word Clock ports
pass crucial timing information, use high-
quality 75-ohm coaxial cables.
Primary Port
The Primary Port is used to connect the 96 I/O
to your Pro Tools|HD cards, or to another
Pro Tools|HD audio interface, using a DigiLink
cable.
• When the 96 I/O is the only audio interface in
the system, the Primary Port is connected di-
rectly to the Accel Core card (Pro Tools|HD for
PCIe systems) or HD Core card (Pro Tools|HD
for PCI systems).
• When the 96 I/O is used as an additional I/O
in an expanded Pro Tools|HD system, the
96 I/O Primary Port can be connected to an
HD Accel or HD Process card, or to the Ex-
pansion port on a 192 I/O, 192 Digital I/O, or
96 I/O. For information about connecting
expanded Pro Tools|HD systems, see the
Expanded Systems Guide.