Specifications

SYNC I/O Guide40
From SYNC I/O Setup software utility
(Windows only):
■ Select Pilot Tone from the SYNC I/O Setup
Clock Ref pop-up menu.
Bi-Phase/Tach and Clock Reference
SYNC I/O is able to resolve to Bi-Phase/Tach in-
formation for use as a clock reference. Bi-
Phase/Tach can synchronize positional refer-
ence, but you must provide a reference start ad-
dress (see “Bi-Phase Position Trimming” on
page 46 for other requirements). Pro Tools will
not lock until the Bi-Phase signal is present.
To configure Bi-Phase/Tach settings, you need
to use the SYNC I/O Setup software utility (Win-
dows only) or SYNC I/O front panel controls.
To configure Bi-Phase/Tach for SYNC I/O clock
reference:
From SYNC I/O Setup software utility
(Windows only):
1 Select Bi-Phase/Tach from the SYNC I/O Setup
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 45 and “Bi-
Phase/Tach Signal” on page 46.
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 Posi-
tional Reference” on page 45.).
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 45 and “Bi-
Phase/Tach Signal” on page 46.
To select Bi-Phase/Tach as the positional
reference from Pro Tools:
■ In the SYNC Setup section of the Pro Tools
Session Setup window, select Bi-Phase from the
Positional Reference pop-up menu.
Internal Clock: Generating and
Regenerating
SYNC I/O can use its own crystal-referenced in-
ternal clock as a master clock source. When
SYNC I/O Clock Reference is set to Internal:
•Word Clock and AES/EBU digital clock out-
puts are simultaneously driven from the inter-
nal crystal reference.
– and –
• If the Positional Reference is set to Generate,
generated LTC, MTC, VITC count, and Win-
dow Dub outputs are resolved to the same in-
ternal crystal reference.
For additional Pilot Tone information, see
“Pilot Tone” on page 71 in Appendix A.
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 I/O front panel will flash.
SYNC I/O accepts up to 12 volts at the Bi-
Phase input.
For additional Bi-Phase/Tach signal infor-
mation, see “Bi-Phase/Tach” on page 70 in
Appendix A.