DigiDesign SYNC HD, Руководство пользователя

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SYNC HD Guide 54
The SYNC HD will regenerate VITC and insert it
onto the video signal (as soon as it receives a
valid clock reference signal and positional refer-
ence signal).
To regenerate VITC based on an external
positional reference from the front panel:
1
Connect the video source to the SYNC HD
Video Ref In connector and loop to the
SYNC HD Video Input connector.
2
Press Set, and use the Up or Down switches to
display VITC Insertion (VI7C In5).
3
Press Set.
4
Use the Down and Up switches toggle be-
tween On and Off.
5
Press Set to select VITC Insertion.
6
Ensure that you have selected the appropriate
video format (NTSC or PAL).
7
Press Set, and use the Up or Down switches to
display VITC Generate Lines (6En LInE).
8
Press Set. The default line pair is14/16, which
is also the SMPTE-recommended setting.
9
Use the Down and Up switches to scroll
through the parameter values and select a VITC
line pair.
10
Press Set. The LED Time Code Display will re-
turn to showing time code numbers.
11
Select valid clock and positional references.
The SYNC HD will regenerate VITC and insert it
onto the video signal (as soon as it receives a
valid positional reference signal).
To regenerate VITC based on an external
positional reference using the SYNC Setup
software utility (Windows only):
1
Ensure that the SYNC HD is connected in-line
with a video source and video destination.
2
Ensure that VITC Insertion Enabled is checked
in the SYNC Setup window and that you have
selected the appropriate video format (NTSC or
PAL).
3
Use the VITC Generate Lines menu to config-
ure the line pair, if necessary.
4
Select the appropriate clock reference.
5
Select either LTC or Bi-Phase/Tach from the
SYNC Setup Positional Reference pop-up menu:
Internal VITC Generation
The SYNC HD can also generate VITC inter-
nally, using its integral time code generating
feature. In this mode (Positional Reference
switch = Generate) you can use either an exter-
nal clock reference, or the SYNC HD internal
crystal as a clock reference with a variable start
time.
When generating VITC internally, if the inser-
tion is not timed based upon an
upstream video
reference you may encounter repeated or
skipped VITC frames. Be sure to check “VITC
Timing Rule” on page 69 and “VITC Video
Source Rule” on page 53.