Avid Technology Pro Tools SYNC HD, Manual, Page: 40 / 166

Pro Tools | SYNC HD Guide 34
To select Auto LTC/VITC for positional reference
using Pro Tools:

In the
SYNC Setup
section of the Session Setup
window, select
Auto LTC/VITC
from the
Posi-
tional Reference
pop-up menu.
To select Auto LTC/VITC for positional reference
using the front panel controls:

Press the
Positional Reference
switch until
both the LTC and VITC LEDs are simultane-
ously lit (this indicates Auto LTC/VITC).
Serial Timecode
SYNC HD provides 9-pin ports that allow Ma-
chineControl-enabled systems to remotely control
or follow external 9-pin transports through the use
of serial timecode.
For MachineControl-equipped Pro Tools systems,
serial timecode from either 9-pin port can be used
for positional reference.
To use Serial Timecode as the SYNC HD positional
reference:

In the
SYNC Setup
section of the Session Setup
window, select
Serial Timecode
from the
Posi-
tional Reference
pop-up menu.
Bi-Phase/Tach
Bi-Phase/Tach signals are clock reference signals,
and do not contain positional information of their
own. However, they do contain enough informa-
tion for SYNC HD to calculate positional informa-
tion.
To calculate positional reference from
Bi-Phase/Tach, the SYNC HD must be given a
starting frame address and a specific pulses-per-
frame value. Each of these related settings are ex-
plained in the following sections.
To use Bi-Phase/Tach for positional reference:
1
Do one of the following:
• In Pro Tools, in the
SYNC Setup
section of the
Session Setup window, select
Bi-Phase
from the
Positional Reference
pop-up menu.
• Press the
Positional Reference
switch on the
front panel of the SYNC HD to select Bi-Phase.
2
Continue by setting the starting frame as de-
scribed in “Bi-Phase/Tach Starting Frame” on
page 35, and setting other Input Signals options,
as appropriate.
The Positional Reference setting you choose
remains set, session to session, until it is
changed again.
For additional information and examples of
Auto Switch LTC/VITC, see “Auto-Switch
LTC/VITC” on page 58.
For details on using serial timecode with
SYNC HD, see the MachineControl Guide.
The Positional Reference setting you choose
remains set, session to session, until it is
changed again.