Specifications

SYNC I/O Guide50
To generate LTC using Pro Tools:
1 In the Time Code Settings section of the Ses-
sion Setup window, select Using SYNC under
Generator.
2 Put Pro Tools online.
3 Start Pro Tools recording or playback.
Pro Tools commands SYNC I/O to begin gener-
ating LTC with time addresses synchronized 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 desired time code start in
hours:minutes:seconds:frames using the Set, Up
and Down switches. See “Generator Start Time”
on page 49 for instructions.
3 To begin generating, press and release the
RUN/STOP/CLEAR/ESC switch.
To generate LTC using SYNC I/O Setup software
utility (Windows only):
1 Select Generate in the Positional Ref pop-up
menu.
2 In the Generator/Bi-Phase Preset window
(time fields), type in the desired time code start
time, in Hrs:Min:Sec:Frm. To reset, click Zero.
3 To begin generating, click Run.
4 When you have finished generating the de-
sired length of LTC, click Stop.
VITC Generation/Regeneration
When you use SYNC I/O to regenerate or gener-
ate VITC, you’ll be inserting VITC into an exist-
ing video signal. The input is derived according
to the following rule.
VITC Video Source Rule
Since SYNC I/O has two video inputs (“Video
In” and “Video Ref In”), the following rule de-
scribes which of these two signals VITC is ap-
plied to.
◆ If the Positional Reference is set to Generate
and 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 In connector
and fed to the Video Out connector.
◆ 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 and fed to the Video Out connector.
In addition, SYNC I/O will not insert new VITC
while reading VITC from an external source.
This is a safety feature to prevent the loss of ex-
isting 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 SYNC I/O’s video input
connectors according to the VITC Video Source
rule.
The SYNC I/O Video Out signal is connected to
the destination device. SYNC I/O is then able to
stripe the second VTR’s videotape with VITC.
(At the same time, you might also want to insert
a window burn. See “Window Burn Display Op-
tions” on page 55.)
Unlike LTC, SYNC I/O can regenerate
VITC with both forward and reverse time
code addresses.