96 I/O Guide
6
Loop Sync In and Out
Loop Sync is a dedicated clock loop for synchro-
nizing multiple HD-series interfaces together.
Loop Sync uses a word clock signal based on
sampling rates of either 44.1 kHz or 48 kHz. As
sample rates increase 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 Loop Sync
clock signal. Loop Sync should only be used to
chain multiple HD-series peripherals together.
Optical (ADAT) In and Out
These are Optical ports which accept up to eight
channels of Optical (ADAT) input and output,
or two channels (stereo) optical S/PDIF input
and output. Optical (ADAT) mode supports
sample rates up to 48 kHz. In TOS-Link mode,
supports two-channel Optical input and output
at sample rates up to 96 kHz.
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 I/O ports are standard 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 requires (or pro-
vides) word clock.
The External Clock In port is configured by your
choice for Clock Source in the Hardware Setup
dialog. The External Clock Out is configured us-
ing the External Clock Out selector in the Hard-
ware Setup dialog.
AC Power
This connector accepts a standard AC power ca-
ble. The 96 I/O is auto power-selecting (100V to
240V) and will automatically work with a stan-
dard modular cable to connect to AC power re-
ceptacles in any country.
Primary DigiLink
The Primary port is where the DigiLink cable
connects from your HD Core or Process card to
the 96 I/O. The Primary DigiLink port sends and
receives all 32 I/O channels to and from the HD
Core or Process card. As the 96 I/O is a 16-chan-
nel only device, channels 17–32 are passed
through to the Expansion port or the Legacy
port.
Expansion DigiLink
The Expansion port is where the DigiLink cable
connects an additional HD I/O to your base, or
primary, HD I/O. This port passes channels
17–32 to the secondary, or expansion, I/O.
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.
