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7 Sync Features
Provision for all Video/TC related signals (VITC, LTC, and Video Sync) is both on a 8-pin Mini-Din connector (for external
connection) and on a 16-pin header (for internal connection). The Video Out can also serve as VITC output and/or TC burn-
in output.
The Mykerinos board supports all standard Video formats such as PAL/NTSC, and all Tri-level HDTV formats as a
reference synchronization source. VITC can only be extracted from standard video formats. Here are the different
possibilities offered by either the Video/TC bracket or breakout cable:
•
NTSC/PAL/VITC Video Reference Input + HDTV reference sync source Input
•
NTSC/PAL/VITC Video 2 Input or Wordclock I/O
•
NTSC/PAL/VITC Video Output
•
LTC (SMPTE/EBU) Timecode Input (balanced, nominal 2 Vp-p)
•
LTC (SMPTE/EBU) Timecode Output (unbalanced, programmable level)
The breakout cable allows Mykerinos to lock to a video “house sync” or a Wordclock reference, read & generate VITC and
read & generate LTC. This option also adds the capability to "burn" a Time code "insert" in the video output signal.
This interface has provision for one BNC input CVS1In, one BNC output CVS Out, one BNC input/output WCK, one XLR
Female for LTC input and one XLR Male for LTC output.
This interface is quite similar in functionality to the Video/TC bracket option. The main difference is in the video loop
through mode, which is not available with the breakout cable.
7.1 Signal Description
7.1.1 CVS1 IN
This input accepts a composite PAL/NTSC or Tri-level HDTV video signal that can be used by Mykerinos to lock its audio
sampling rate to a video reference. The CVS1 input should be used for the main “house sync” or "black-burst" reference
video signal. It is also possible to use this input as a VITC source (only standard PAL and NTSC rates).
Historically all the Mykerinos boards were shipped with jumper JP4 closed, which activates the 75Ω video termination on
CVS1IN signal.
Dated from Mid-April 2006, Merging has decided to ship all the Mykerinos boards with JP4 open
(MB1 S/N 15489 - …, MB2 S/N 13364 - … and MB5 S/N 17449 - …).
See below an extract of the ECO MYK013 for a technical detailed explanation:
“
Historically all the Mykerinos boards were shipped with jumper JP4 closed, which activates the 75Ω video termination on
CVS1IN signal.
Exception was made when a Mykerinos board is integrated into a Merging Workstation (Pyramix or VCube). In that case,
this jumper is left open by Merging to avoid a double video termination, one on the Mykerinos board (JP4) and one on the
chassis rear panel (switch).
Then, on most cases, the integration of the Mykerinos board into a Merging Workstation is left to the discretion of the
Dealers themselves or to an official assembly sub-contractor.
As many persons may be involved in this process, an error on JP4 may occur at different moments between the final
assembly process, the shipment department, and the integration into the Merging Workstation.
Due to the increasing percentage of Mykerinos boards integrated in a Merging chassis since 2005 and to avoid a double
termination on JP4, Merging has decided to ship all the Mykerinos boards (from serial numbers indicated above) with JP4
open, without differentiation if the boards will be integrated into a Merging Workstation or not. The jumper will be present
but only attached to one pin of the JP4 connector.
Consequently, all the chain process will be drastically simplified, involving only the final assembly department and thus,
avoiding any future problems.”
