Specifications

Chapter 4: Using SYNC I/O 45
From SYNC I/O Setup software utility
(Windows only):
■ Select Auto Switch LTC/VITC from the
SYNC I/O Setup Positional Ref pop-up menu.
Serial Time Code
SYNC I/O provides two 9-pin ports, to be used
with MachineControl-enabled systems to re-
motely control, or follow, external 9-pin trans-
ports through the use of serial time code.
For MachineControl-equipped Pro Tools sys-
tems, serial time code from either 9-pin port can
be used for positional reference. This option is
configured from the Peripherals dialog. For de-
tails on using serial time code with SYNC I/O,
see the MachineControl Guide.
Bi-Phase/Tach Positional Reference
Bi-Phase/Tach signals are clock reference sig-
nals, and do not contain positional information
of their own. However, they do contain enough
information for SYNC I/O to calculate posi-
tional information.
To calculate positional reference from Bi-
Phase/Tach requires that SYNC I/O be given a
starting frame address, and a specific pulses-per-
frame value. Each of these related settings are
explained in the following sections.
To use Bi-Phase/Tach for positional reference:
First, do one of the following:
From Pro Tools:
■ In the SYNC Setup section of the Session
Setup window, select Bi-Phase from the Posi-
tional Reference pop-up menu.
From the front panel:
■ Press the Positional Reference switch to select
BI-PHASE.
From SYNC I/O Setup software utility
(Windows only):
■ Select Bi-Phase/Tach from the SYNC I/O Setup
Positional Ref pop-up menu.
Continue by setting the starting frame as de-
scribed in “Bi-Phase/Tach Starting Frame” on
page 45, and setting other Input Signals op-
tions, as appropriate.
Bi-Phase/Tach Starting Frame
In order to use the Bi-Phase/Tach signal as a po-
sitional reference, SYNC I/O also needs to know
the time code address for a particular frame of
film. This positional relationship is established
by parking the film device at a particular frame
and setting SYNC I/O to the equivalent time
code value using the Bi-Phase/Tach Starting
Frame parameter.
To set the Bi-Phase/Tach start frame from the
front panel:
1 Press Set, and use the Up or Down switches to
display Set Gen (SE7 6En).
2 Press Set to display time code numbers. One of
the time code fields (hours:minutes:sec-
onds:frames) flashes.
3 Press the Up or Down switch to scroll through
the parameter values.
4 To set a time code setting and advance to the
next field, press and release the Down and Up
switches simultaneously.
For additional information and examples of
Auto Switch LTC/VITC, see “Auto-Switch
LTC/VITC” on page 68 in Appendix A.
Bi-Phase start frame cannot be set from
within Pro Tools. Use the Sync I/O Setup
software utility or the SYNC I/O front panel
controls.