User Manual-MADI

Chapter 2: HD OMNI Overview 15
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.
LOOP SYNC In and Out
Loop Sync is a dedicated clock loop for synchro-
nizing multiple Pro Tools|HD peripherals
together (multiple audio interfaces, and/or a
SYNC HD™ or SYNC I/O™ and one or more au-
dio interfaces). Loop Sync uses a word clock sig-
nal 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 SYNC HD or SYNC I/O).
AC Power
This connector accepts a standard AC power ca-
ble (included). HD OMNI is auto power-select-
ing (100V to 240V) and will automatically work
with a standard modular cable (IEC) to connect
to AC power outlets in any country.
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.