Specifications

SYNC HD Guide52
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
properly configured before you begin. If neces-
sary, adjust the input level for the destination
device.
To generate LTC using Pro Tools:
1 In the expanded Transport window, click
Gen LTC.
2 Start Pro Tools recording or playback.
Pro Tools commands the SYNC peripheral to be-
gin generating LTC with time addresses synchro-
nized to the session time line.
To generate LTC using the front panel controls:
1 Press the Positional Reference switch to select
Generate.
2 Configure the timecode start in hours:min-
utes:seconds:frames using the Set, Up and Down
switches. See “Generator Start Time” on page 51
for instructions.
3 To begin generating, press and release the
Run/Stop/Clear/Esc switch.
To generate LTC using the SYNC Setup software
utility (Windows only):
1 Select Generate in the Positional Ref pop-up
menu.
2 In the Generator/Bi-Phase Preset section, enter
the timecode start time, in Hrs:Min:Sec:Frm. To
reset to 00:00:00:00, click
Zero.
3 To begin generating, click Run.
4 When you have finished generating the desired
length of LTC, click
Stop.
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 Gen LTC setting you choose remains set,
session to session, until it is changed again.