DigiDesign SYNC HD Manual page 58

Generating LTC
In Generator Preset mode, the SYNC peripheral
can generate LTC using either an external or in-
ternal clock reference. Make sure LTC is cor-
rectly routed and that all your other gear is prop-
erly configured before you begin. If necessary,
adjust the input level for the destination device.
To generate LTC:
From Pro Tools:
In the expanded Transport window, click
1
Gen LTC.
Start Pro Tools recording or playback.
2
Pro Tools commands the SYNC peripheral to be-
gin generating LTC with time addresses syn-
chronized to the session time line.
From the front panel:
Press the Positional Reference switch to select
1
Generate.
Configure the time code start in hours:min-
2
utes:seconds:frames using the Set, Up and Down
switches. See "Generator Start Time" on page 51
for instructions.
To begin generating, press and release the
3
Run/Stop/Clear/Esc switch.
From the SYNC Setup software utility
(Windows only):
Select Generate in the Positional Ref pop-up
1
menu.
In the Generator/Bi-Phase Preset section, enter
2
the time code start time, in Hrs:Min:Sec:Frm. To
reset to 00:00:00:00, click Zero.
To begin generating, click Run.
3
When you have finished generating the de-
4
sired length of LTC, click Stop.
52 SYNC HD Guide
VITC Generation/Regeneration
When you use a SYNC peripheral to regenerate
or generate VITC, you'll be inserting VITC into
an existing video signal. The input is derived ac-
cording to the following rule.
VITC Video Source Rule
SYNC peripherals have two video inputs ("Video
In" and "Video Ref"). The following rule de-
scribes which of these two signals VITC is ap-
plied to.
If the Clock Reference is set to either of the
two video inputs, then VITC will be applied to
the video signal at the Video Ref input.
Under all other combinations of Positional
Reference and Clock Reference, VITC will be ap-
plied to the video signal at the Video In connec-
tor.
In addition, the SYNC peripheral will not insert
new VITC while reading VITC from an external
source. This is a safety feature to prevent the loss
of existing VITC in the video stream. VITC is
never inserted when the Positional Reference is
set to VITC or Auto Switch LTC/VITC.
Example Video Input Configuration
One common situation is transferring video
from a source VTR (or a nonlinear video editing
system) to a destination VTR (or a nonlinear
video editing system). The video source signal is
connected to one of the SYNC peripheral video
input connectors according to the VITC Video
Source rule.
The SYNC peripheral Video Out signal is con-
nected to the destination device. The SYNC pe-
ripheral is then able to stripe the second VTR's
videotape with VITC. (At the same time, you
might also want to insert a window dub. See
"Generating a Window Dub" on page 56.)