Avid HD OMNI Preamp, I/O, and Monitoring Pro Tools HD Series Interface - Manual (Page 18)

HD OMNI Guide 14
EXPANSION PORT
The EXPANSION PORT lets you connect an ad-
ditional Pro Tools|HD audio interface to
HD OMNI. The EXPANSION PORT passes input
and output channels 17–32 to the expansion (or
secondary) audio interface.
This port is only available when HD OMNI is
connected to a Pro Tools|HD or Pro Tools|HD
Native card (it is not available when the HD I/O
is connected to the Expansion Port on another
audio interface).
DigiLink Mini Cable Length Specifications
There are six different lengths of DigiLink Mini
cables:
• 18 ” (0.46m), included with each interface
• 12 ’ (3.6m)
• 25 ’ (7.62m)
• 50 ’ (15.25m), the maximum length sup-
ported for 192 kHz sessions (sold sepa-
rately)
• 100 ’ (30.5m), the maximum length sup-
ported for 96 kHz sessions (sold separately)
DigiLink to DigiLink Mini Adapter Cables
Use DigiLink to DigiLink Mini adapter cables to
connect HD OMNI to Pro Tools|HD cards. You
can also use DigiLink to DigiLink Mini adapter
cables to connect older HD peripherals (such as
192 I/O) to the EXPANSION PORT of HD OMNI.
There are two types of DigiLink to DigiLink Mini
adapter cables:
• 12 ” (0.3 m) DigiLink female to DigiLink
Mini male, included with each interface
• 12” (0.3 m) DigiLink Mini female to Di-
giLink male
Clock and Synchronization Ports
WD CLK IN and OUT
The Word Clock I/O ports are standard BNC
connectors that receive and output word clock
signal. These ports can be used to synchronize
HD OMNI with any word clock-capable device.
Word Clock In can be selected as the Clock
Source from the front panel or in the Hardware
Setup dialog in Pro Tools. Word Clock Out can
be configured in the Hardware Setup dialog us-
ing the
External Clock Output selector.
For more information about DigiLink Mini
and DigiLink Mini to DigiLink cables, visit
the Avid website (www.avid.com).
Back panel Word Clock and Loop Sync In and Out
Because crucial timing data is passed
through the Loop Sync and Word Clock ports,
you should use high-quality, 75-ohm RG–59
cables for making connections.