DigiDesign 192 I/O Manual page 14

EXT. CLOCK In and Out
The External Clock I/O ports are standard BNC
connectors that receive and output a word clock
signal. These ports can be used to synchronize
the 192 I/O with any word clock-capable device.
The External Clock In is configured by your
choice for Clock Source in the Hardware Setup
dialog. The External Clock Out is configured us-
ing the External Clock Output selector in the
Hardware Setup dialog.
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.
AC Power
This connector accepts a standard AC power ca-
ble. The 192 I/O is auto power-selecting (100V
to 240V) and will automatically work with a
standard modular cable to connect to AC power
receptacles in any country.
Primary DigiLink Port
The Primary port is where the DigiLink cable
connects a Pro Tools|HD card (or other audio in-
terface) to the 192 I/O.
The Primary port sends and receives 32 channels
to and from the Pro Tools|HD cards (or other in-
terface). Channels 17–32 (if active) are passed
through to the Expansion port or the Legacy
port.
10 192 I/O Guide
DigiLink Cable Length Specifications
There are five different lengths of DigiLink ca-
bles.
• 18" (0.46m), included with each interface
• 12' (3.6m), included with each
Pro Tools|HD card
• 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 by 96 kHz sessions (sold separately)
For more information about DigiLink
cables, visit the Digidesign website
(www.digidesign.com).
Expansion DigiLink Port
The Expansion port lets you connect an addi-
tional Pro Tools|HD audio interface to the
192 I/O. The Expansion port passes channels
17–32 to the secondary, or expansion I/O.
This port is only available when the 192 I/O is
connected to a Pro Tools|HD card (it is not avail-
able when the 192 I/O is connected to the Ex-
pansion Port on another audio interface).
Legacy Port
This port lets you connect Digidesign MIX-series
audio interfaces to the 192 I/O. You can connect
two eight-channel interfaces (such as the 888|24
I/O ™ or 882|20 I/O™) or a single sixteen-chan-
nel interface (such as the 1622 I/O™, or 24-bit
ADAT Bridge I/O™) for expanded input and out-
put options, using their original cables.
When the Legacy port has been activated from
within Pro Tools, the MIX-series I/O appears as
channels 17–32 in Pro Tools.
For more information, see the HD Setup Guide