Specifications

Chapter 3: SYNC I/O Hardware and Software 27
Video In/Out
Video In Receives a signal from an NTSC/PAL
video source for clock or VITC positional refer-
ence input, or for generating a window burn.
This connector is internally terminated at
75 ohms.
Video Out Output of the current Video In signal.
If the Positional Reference is set to Generate and
the Clock Reference is set to one of the two
video inputs, this will output a copy of the video
signal appearing at the Video Reference input.
In either case, this output might additionally
carry VITC and/or Window Burn information if
those features are enabled.
MTC Out
The MTC Out will output MIDI Time Code
(MTC), only. No other MIDI data appears at this
output. MTC output can be regenerated while
SYNC I/O is locked to any supported positional
reference and clock reference, or internally gen-
erated in Generate mode, in which case MTC
output follows generator run/stop. This port is
intended to supply MTC from SYNC I/O to ex-
ternal sequencers or other MIDI devices.
MTC is output constantly whenever SYNC I/O is
generating time code. This output can be muted
when time code (LTC) is idle. See “MTC Output
and Idle Muting” on page 53 for details.
LTC In/Out
LTC In Receives a Linear Time Code (LTC)
source, balanced or unbalanced analog, for
clock and positional reference. This port is often
used to receive LTC from an audio track on an
external deck or the address track of a VTR. Ad-
justable LTC servo gain is available in Pro Tools
and from the front panel.
LTC Out Outputs linear time code, in balanced
or unbalanced analog audio format. See
Appendix C, “Wiring Diagrams and Pin Assign-
ments” for wiring details. LTC output gain is
also adjustable using the SYNC I/O Setup soft-
ware utility (Windows only) or the controls on
the front panel of the SYNC I/O.
AES/EBU In/Out
AES In Receives an AES/EBU digital audio signal,
for clock reference purposes only. SYNC I/O uti-
lizes only the signal's clock information, not the
audio information. If digital audio information
is present at this input, it will be ignored and
not passed through to the AES/EBU digital out-
put connector.
AES/EBU Out Outputs a silent (all bits OFF)
AES/EBU audio signal whose sample rate exactly
matches SYNC I/O Word Clock BNC output.