DigiDesign SYNC HD, Manual

Page: 52 / 103

SYNC HD Guide 46
• If the same tape has different values for LTC
and VITC signals, make sure to run only
against LTC by disabling Auto LTC/VITC.
Otherwise, Pro Tools may locate to different
places depending on whether the tape is static
or playing back.
To select Auto Switch LTC/VITC for positional
reference:
From Pro Tools:
„
In the SYNC Setup section of the Session
Setup window, select Auto Switch (LTC/VITC)
from the Positional Reference pop-up menu.
From the front panel:
„
Press the Positional Reference switch to select
Auto Switch LTC/VITC (indicated when both
the LTC and VITC LEDs are simultaneously lit).
From the SYNC Setup software utility
(Windows only):
„
Select Auto Switch LTC/VITC from the SYNC
Setup Positional Ref pop-up menu.
Serial Time Code
The SYNC HD provides two 9-pin ports, to be
used with MachineControl-enabled systems to
remotely control, or follow, external 9-pin
transports 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 the
SYNC HD, 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 the SYNC HD to calculate posi-
tional information.
To calculate positional reference from Bi-
Phase/Tach requires that the SYNC HD 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 & Time Code Offsets sec-
tion of the Session Setup window, select Bi-
Phase from the Positional Reference pop-up
menu.
From the front panel:
„
Press the Positional Reference switch to select
BI-PHASE.
From the SYNC Setup software utility
(Windows only):
„
Select Bi-Phase/Tach from the SYNC Setup Po-
sitional Ref pop-up menu.
Continue by setting the starting frame as de-
scribed in “Bi-Phase/Tach Starting Frame” on
page 47, and setting other Input Signals options,
as appropriate.
For additional information and examples of
Auto Switch LTC/VITC, see “Auto-Switch
LTC/VITC” on page 70 in Appendix A.