Specifications

SYNC HD Guide16
When the SYNC peripheral is not the selected
Clock Source device, the
Clock Reference menu
in the
SYNC Setup section switches to Loop
Sync.
To choose a Clock Reference:
 Select an available clock source from the
Clock Reference pop-up menu in the Session
Setup window.
The
Clock Source pop-up menu follows your se-
lection of the SYNC peripheral for Clock Refer-
ence by automatically switching to the SYNC
setting. (You can also choose the SYNC periph-
eral as Clock Source first, then select a Clock
Reference.)
To choose a different Loop Sync device as the
Clock Source:
 Select a different Loop Sync device and Clock
Source from the
Clock Source pop-up menu in
the Session Setup window.
When Clock Source is an HD I/O
When a Pro Tools audio interface is providing
the Clock Source, it will be the Loop Master.
Clock Source options are available directly from
the
Clock Source menu, based on the configura-
tion of that interface in the Hardware Setup di-
alog. Choices can include AES, S/PDIF, Optical,
or Word Clock.
Ref Present, Locked and Speed Cal
Indicators
The Ref Present, Locked and Speed Cal indica-
tors in the Session Setup window display syn-
chronization status of the SYNC peripheral. The
Locked and Speed Cal indicators mirror the
same LEDs on the front panel.
Ref Present The Ref Present indicator lights
when a valid video signal is present on the Video
Ref connectors.
Locked The Locked indicator stays lit when the
SYNC peripheral is locked to the selected clock
reference. The
Locked indicator flashes if the se-
lected clock reference source is missing or out of
lockable frequency range.
For LTC clock reference, multiple choices
are available from the LTC sub-menu. See
“LTC and Clock Reference” on page 39.
Choosing a Clock Reference
Choosing a Clock Source (HD OMNI shown)
See the User Guide that came with your
system for more information on configuring
audio interfaces.
Ref Present, Locked and Speed Cal Indicators
In Pro Tools HD, these indicators are also
displayed in the Transport and Edit windows.
For more information, see “Sync Status Indi-
cators in the Edit Window” on page 58.