DigiDesign SYNC HD, Manual

Page: 47 / 103

Chapter 4: Using SYNC HD 41
From the front panel:
1
Press the Clock Reference switch to select
BI-PHASE/TACH.
2
Select the appropriate Pulse Per Frame and In-
put Signals parameters, as described in “Bi-
Phase/Tach Starting Frame” on page 47 and “Bi-
Phase/Tach Signal” on page 47.
To select Bi-Phase/Tach as the positional
reference from Pro Tools:
1
In the SYNC Setup section of the Pro Tools
Session Setup window, select Bi-Phase from the
Positional Reference pop-up menu.
2
Set the Pulse Per Frame and Input Signals from
the Synchronization page of the Peripherals dia-
log.
Internal Clock: Generating and
Regenerating
The SYNC HD can use its own crystal-referenced
internal clock as a master clock source. When
SYNC HD Clock Reference is set to Internal:
• Word Clock and AES/EBU digital clock out-
puts are simultaneously driven from the in-
ternal crystal reference.
– and –
• If the Positional Reference is set to Gener-
ate, generated LTC, MTC, VITC, and Win-
dow Dub outputs are resolved to the same
internal crystal reference.
To resolve the SYNC HD to its internal clock:
From Pro Tools:
„
In the SYNC Setup section of the Pro Tools
Session Setup window, select Internal/VSO from
the Clock Reference pop-up menu.
From the front panel:
„
Press the Clock Reference switch to select
INTERNAL/VSO.
From the SYNC Setup software utility
(Windows only):
„
Select Internal/VSO from the SYNC Setup
Clock Ref pop-up menu.
If the Bi-Phase/Tach reference clock source
is not valid for any reason (such as a poor
connection or other signal transmission
problem), the Locked LED on the far-right
of the SYNC HD front panel will flash. The
SYNC HD accepts up to 12 volts at the Bi-
Phase input.
For additional Bi-Phase/Tach signal infor-
mation, see “Bi-Phase/Tach” on page 72 in
Appendix A.