Specifications

Chapter 4: Using SYNC Peripherals 45
To set VITC as the SYNC peripheral positional
reference using Pro Tools:
 In the SYNC Setup section of the Session
Setup window, select
VITC from the Positional
Reference
pop-up menu.
To set VITC as the SYNC peripheral positional
reference using the front panel controls:
 Press the Positional Reference switch to select
VITC.
To set VITC as the SYNC peripheral positional
reference using the SYNC Setup software utility
(Windows only):
 Select Vertical Interval Timecode (VITC) from
the
Positional Ref pop-up menu.
Additional VITC-Related Settings
SYNC Peripheral Settings Make sure to set the
appropriate clock reference, sample rate, frame
rate, and freewheel duration.
Connections and Sources Make sure that your
VITC-striped video signal, if any, is routed to
the Video In connector (not a Video Ref connec-
tor). If you use a black burst signal as clock ref-
erence, connect it to a Video Ref connector.
We recommend using Video Ref as your Clock
Reference (rather than Video In) when working
with VITC, because a blackburst signal at the
Video Ref input will always be present, unlike
the video signal at Video In, which may disap-
pear.
Auto LTC/VITC Positional
Reference
In Auto LTC/VITC mode, the SYNC peripheral
switches automatically between LTC and VITC
depending upon which is delivering the best
timecode signal. This is indicated on the front
panel by the LTC and VITC positional reference
LEDs (both will be lit), and by a decimal point
between the minutes and seconds on the front
panel timecode display.
VITC cannot be read at high speeds (shuttle
speeds, for example) while LTC can, and LTC
cannot be read at slow speeds (while VITC can
be read at slow speeds, and when parked). Auto
LTC/VITC provides the best of both LTC and
VITC without having to manually switch
settings.
Auto LTC/VITC Requirements
• Make sure the LTC signal is routed properly to
the SYNC peripheral LTC In connector.
• Make sure the VITC-striped video signal is
routed properly to the SYNC peripheral Video
In connector (not a Video Ref connector).
• Make sure to have or stripe matching code on
both your LTC and VITC tracks (and your on-
screen video window burn, if any).
• Make sure to select Auto or the correct line
pair for VITC Read.
• Make sure to select the appropriate clock ref-
erence, sample rate, frame rate, and freewheel
duration options.
The Positional Reference setting you choose
remains set, session to session, until it is
changed again.
If the same tape has different values for LTC
and VITC signals, make sure to run only ref-
erencing LTC by disabling Auto LTC/VITC.
Otherwise, Pro Tools may locate to different
places depending on whether the tape is idle
or playing back.