DigiDesign SYNC HD Manual page 51

To use VITC as the SYNC peripheral positional
reference:
From Pro Tools:
In the SYNC Setup section of the Session Setup
window, select VITC from the Positional Refer-
ence pop-up menu.
From the front panel:
Press the Positional Reference switch to select
VITC.
From the SYNC Setup software utility
(Windows only):
Select Vertical Interval Time Code (VITC) from
the SYNC Setup 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 connector).
If you use a black burst signal as clock reference,
connect it to a Video Ref connector.
Digidesign recommends 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
disappear.
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
time code 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 time code 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.
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.
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.
Chapter 4: Using SYNC Peripherals 45