DigiDesign SYNC HD Manual page 47

Bi-Phase/Tach and Clock
Reference
The SYNC peripheral is able to resolve to
Bi-Phase/Tach information for use as a clock ref-
erence. Bi-Phase/Tach can synchronize posi-
tional reference, but you must provide a refer-
ence start address (see "Bi-Phase Position
Trimming" on page 48 for other requirements).
Pro Tools will not lock until the Bi-Phase signal
is present.
To configure Bi-Phase/Tach for the SYNC
peripheral clock reference:
From Pro Tools:
In the SYNC Setup section of the Pro Tools
1
Session Setup window, select Bi-Phase from the
Positional Reference pop-up menu.
Choose Setup > Peripherals and click Synchro-
2
nization.
Enter the Pulses Per Frame and choose the In-
3
put Signal setting, as described in
"Bi-Phase/Tach Starting Frame" on page 47 and
"Bi-Phase/Tach Signal" on page 47.
From the front panel:
Press the Clock Reference switch to select
1
Bi-Phase/Tach.
Select the appropriate Pulse Per Frame and In-
2
put Signals parameters, as described in
"Bi-Phase/Tach Starting Frame" on page 47 and
"Bi-Phase/Tach Signal" on page 47.
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 peripheral front panel flashes.
SYNC peripherals accept up to 12V at the
Bi-Phase input.
From the SYNC Setup software utility
(Windows only):
Select Bi-Phase/Tach from the SYNC Setup
1
Clock Ref pop-up menu.
Select the appropriate Pulse Per Frame and In-
2
put Signals parameters, as described in
"Bi-Phase/Tach Starting Frame" on page 47 and
"Bi-Phase/Tach Signal" on page 47.
Typically, when you use Bi-Phase/Tach as the
clock reference you will also be using it as the
positional reference (see "Bi-Phase/Tach" on
page 46.).
For additional Bi-Phase/Tach signal infor-
mation, see "Bi-Phase/Tach" on page 74 in
Appendix A.
To resolve a SYNC peripheral to its internal clock:
From Pro Tools:
In the SYNC Setup section of the Pro Tools Ses-
sion 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.
Chapter 4: Using SYNC Peripherals 41