Specifications

Chapter 4: Using SYNC I/O 37
Serial Time Code with MachineControl
MachineControl-equipped Pro Tools systems
can utilize serial time code through either of the
SYNC I/O 9-pin ports. When using Machine-
Control with serial time code as the positional
reference, SYNC I/O must be locked to a Video
Reference. In this scenario, SYNC I/O is set to
Generate mode to indicate that positional infor-
mation is acquired by Pro Tools directly over the
9-pin cable, not through SYNC I/O. Refer to the
MachineControl Guide for complete serial time
code information.
Video and Clock Reference
If you have only a single video source, and since
SYNC I/O uses different video inputs depending
on configuration, you may want to follow the
wiring tip below to ensure that you have full
functionality in all configurations:
To work with a single video source:
1 Connect the video signal to Video Ref In.
2 Run a short BNC jumper cable from the Video
Ref Out connector to the Video In connector.
3 Connect the Video Out signal to the video in-
put of your “destination” VTR or video editing
system.
The choice of video connector also matters
when choosing a positional reference. For in-
stance, when SYNC I/O is in Generate mode and
Video is the current clock reference, the time
code reference for the generator is always from
the Video Ref In connector. However, if you se-
lect a positional reference other than Generate,
then the signal at the Video In connector is
used.
Digital Clock
To resolve SYNC I/O to external AES/EBU, Word
Clock, or Slave Clock:
From Pro Tools:
■ In the SYNC Setup section of the Session
Setup window, select the appropriate digital
clock reference from the Clock Reference pop-
up menu.
From the front panel:
1 Press the Clock Reference switch to select
DIGITAL.
2 Press Set, and use the Up or Down switches to
display Digital Reference (dI6 rEF).
3 Press Set again. The LED Time Code Display
displays the current digital reference, which will
be:
• AES/EBU (AES-E8U)
– or –
•Word Clock (I CLOC)
4 Press Up or Down to select the digital clock
you want to use.
5 Press Set.
MachineControl also provides 9-Pin Deck
Emulation mode, but this mode is not sup-
ported through either of the SYNC I/O 9-pin
ports. See the Digidesign MachineControl
Guide for more information.
For more video signal information, refer to
“Video and VITC Signals” on page 67 in
Appendix A.