Blackmagicdesign HDLink Optical Fiber, Руководство по эксплуатации

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Troubleshooting
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Troubleshooting
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Some or all video formats fail to work with a DVI display
The following information relates to the use of DVI-D displays with HDLink and HDLink 2. It does not apply
to HDMI displays used with HDLink.
1. Check the DVI-D cable
DVI-D cables are usually reliable but there are many different brands and lengths and it is wise to test
with another cable if you have poor video or no video output. Try using a good quality cable which is of a
standard length, i.e. around 6 feet or 2 meters. While long DVI-D cables are available, some work better
than others and so we recommend the use of the standard length cables, i.e. around 6 feet or 2 meters.
2. Check the specifications of your display.
HDLink supports single-link DVI-D displays. It does not support dual-link DVI-D displays such as the Apple
Cinema HD 30” display. Blackmagic Design has newer HDLink models which support both single-link and
dual-link DVI-D displays.
Next, check that your DVI-D display has an adequate resolution to support the video formats with which
you work. HDLink is designed to display video pixel-for-pixel and does not scale down to fit lower resolution
displays. HDLink supports video formats including:
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NTSC, 720 x 486 pixels
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PAL, 720 x 576 pixels
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HDTV 720p, 1280 x 720 pixels
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HDTV 1080, 1920 x 1080
Numerous 23” and 24” DVI-D displays support 1920 x 1200 resolution and these are excellent for use with
HDTV 1080 material. The resolution of these displays is high enough for HDLink to display NTSC and PAL
at x2 resolution. This is nice as standard definition video almost fills these displays at x2 resolution.
If your display is of a lower resolution than the video format with which you are working, your video will not
display correctly. For example, you cannot output 1920 x 1080 video to a 1280 x 720 display.
Similarly, a 1280 x 720 display is more than adequate to display NTSC and PAL video but it will not support
x2 display of these formats.
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