Avid Technology Pro Tools SYNC HD, Manual

Page: 47 / 166

Chapter 4: Using Pro Tools | SYNC HD 41
Internal VITC Generation
SYNC HD can also generate VITC internally, us-
ing the integral timecode generating feature. In this
mode (Positional Reference switch = Generate)
you can use either an external clock reference, or
the SYNC HD internal crystal as a clock reference
with a variable start time.
When generating VITC internally, if the insertion
is not timed based upon an
upstream video refer-
ence you may encounter repeated or skipped VITC
frames. Refer to “VITC Timing Rule” on page 57
and “VITC Video Source Rule” on page 39.
To generate VITC internally using Pro Tools:
1
Ensure that the SYNC HD is connected in-line
with a video source and video destination.
2
Ensure that
VITC Insertion Enabled
is selected
in the Synchronization page of the Peripherals
dialog.
3
If necessary, choose the line pair from the
VITC
Generate Lines
pop-up menu in the in the Syn-
chronization page of the Peripherals dialog.
4
In the
SYNC Setup
section of the Session Setup
window, select a valid clock reference and en-
sure that you have selected the appropriate
video format (NTSC or PAL, depending on
your project). For instructions, see “Video For-
mat/System” on page 50.
5
Put Pro Tools online.
6
Start Pro Tools recording or playback.
Pro Tools commands the SYNC HD to begin
generating VITC with time addresses synchro-
nized to the session time line.
To generate VITC internally using the front panel
controls:
1
Ensure that the SYNC HD is connected in-line
with a video source and video destination.
2
Press Set, and use the Up and Down switches to
display VITC Insertion (“VI7C In5”). For de-
tailed instructions, see “VITC Insertion” on
page 46.
3
Use the Down and Up switches to toggle VITC
Insertion On and Off.
4
When On is selected, press Set.
5
Press Set, and use the Up and Down switches to
display VITC Generate Lines (“6En LInE”).
6
Press Set. The default line pair is 14/16, which
is also the SMPTE-recommended setting.
7
Use the Down and Up switches to scroll through
the parameter values and select a VITC line
pair.
8
Press Set.
9
Using the Positional Reference switch, select
Generate.
10
Set the timecode start time. See “Generator
Start Time” on page 38 for instructions.
11
Arm the destination VTR to record video, so
that VITC can be inserted into the video signal,
and be recorded on the destination videotape.
12
Make sure that your chosen clock reference is
actually present and running, then press the
SYNC HD Run switch.
The timecode addresses will begin to increment.