NVIDIA Corporation
Quadro FX 4000 SDI User’s Guide
– Version 2.1
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HAPTER
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Using the Graphics to SDI 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 scanning 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
SDI signal 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
SDI signal format
list.
Supported Synchronization Signals
NVIDIA Genlock supports the following 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.)
