Avid HD OMNI Preamp, I/O, and Monitoring Pro Tools HD Series Interface - Manual (Page 19)

Chapter 2: HD OMNI Overview 15
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.