Using Auto-SYNC for Digital Input Connections
TIMS MVP
™
Setup and Configuration Guide 201
AccuStream Auto-SYNC Wizard Step 1: Adjust HTotal for SDTV
Connections
In the Analog world normally the video’s Horizontal Total (HTotal) can be
adjusted, however, due to the design of the AccuStream Express HD+ frame grabber when using
the S-Video or BNC inputs AutoSYNC will use factory pre-made SDTV CHP files and HTotal is not
adjustable.
If the SDTV video is connected using the DVI to 5 BNC cable (P/N: 030093), the DVI to BNC
Adapter (P/N: 030175) or the S-Video to BNC cable (P/N: 030193),
then AutoSYNC will measure the incoming video source and Htotal is
adjustable.
Use of the DVI to 5 BNC cable or DVI to BNC adapter for NTSC Color S-Video or Composite video
signals requires a low pass filter or a color burst filter to filter
out the color information, or else the color information will produce a herringbone pattern in
the video. Use of this procedure will result in MONOCHROME video.
Adjusting Htotal for SDTV using the DVI Adapters
Htotal is the number of pixels per scan line in the video signal; some of these pixels are not part
of the active video (e.g., porches which are on the right and left side of the image) so HTotal
represents the active plus the inactive video signal measured as pixels. Increasing the HTotal
widens the image, increasing the aspect ratio.
Note:
Be aware of the monitor format (your display, (for example, is it 5:4 or
16:9), before adjusting the HTotal. Your display monitor aspect ratio
should be set to the same aspect ratio as the video source.
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