Specifications

Chapter 4: Using SYNC Peripherals 41
Bi-Phase/Tach and Clock
Reference
SYNC peripherals are able to resolve to
Bi-Phase/Tach information for use as a clock
reference. Bi-Phase/Tach can synchronize posi-
tional reference, but you must provide a refer-
ence start address (see “Bi-Phase Position Trim-
ming” 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:
1 In the SYNC Setup section of the Pro Tools
Session Setup window, select
Bi-Phase from the
Positional Reference pop-up menu.
2 Choose Setup > Peripherals and click Synchro-
nization
.
3 Enter the Pulses Per Frame and choose the In-
put Signal setting, as described in
“Bi-Phase/Tach Starting Frame” on page 47 and
“Bi-Phase/Tach Signal” on page 47.
To configure Bi-Phase/Tach for the SYNC
peripheral clock reference using the front panel
controls:
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 configure Bi-Phase/Tach for the SYNC
peripheral clock reference using the SYNC Setup
software utility (Windows only):
1 Select Bi-Phase/Tach from the Clock Ref pop-
up menu.
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.
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.).
To resolve a SYNC peripheral 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.
To resolve a SYNC peripheral to its internal clock
using the front panel controls:
 Press the Clock Reference switch to select
Internal/VSO.
To resolve a SYNC peripheral to its internal clock
using the SYNC Setup software utility (Windows
only):
 Select Internal/VSO from the Clock Ref pop-up
menu.
If the Bi-Phase/Tach reference clock source is
not valid for any reason (such as a poor con-
nection or other signal transmission prob-
lem), 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.
For additional Bi-Phase/Tach signal infor-
mation, see “Bi-Phase/Tach” on page 74.