Nvidia Quadro FX 4800 - Synchronizing the SDI Output to an External Source

NVIDIA Corporation
44 Quadro FX 4800/5800 and Quadro CX SDI User’s Guide– Version 1.0
C
HAPTER 4
Linux—Using the Graphics to Video Out Control Panel
Synchronizing the SDI Output to an External Source
YoucansynchronizetheSDIoutputwithotherequipmentinabroadcastorpost
productionenvironment.
Genlock Versus Frame Lock
TheGraphicstoSDIpageprovidestwomethodsforsynchronizingtheSDIoutputtoa
commonsyncsource—GenlockandFramelock.
Using Genlock
Genlocksynchronizesthepixelscanni ngoftheSDIoutputtoanexternalsynchronization
source.
Whenusinggenlock,theSDIrefreshrateisdeterminedbythesyncsource,soanyrefresh
ratesthatyoumayhavechosenintheOutputVideoFormatlistdonotapply.
Using Frame Lock
FramelocksynchronizestheframerateoftheSDIoutputtoanexternalsynchronization
source.
Whenusingframelock,onlymodesthatarevalidfortheframerateofthesyncsourcecan
beusedfortheSDIoutput.ThevalidmodeswillappearintheOutputVideoForm atlist.
Supported Synchronization Signals
NVIDIAGenlocksupportsthefollow ingexternalsynchronizationsignaltypes:
•SDI
•CompositeBi‐level(NTSCorPALsourcesusebi‐levelcompositesignals.)
•CompositeTri‐level(HDTVsources commonlyusetri‐levelcompositesignals.)