Gefen DVI Network Card User Manual


 
Frequently Asked Questions
What kind of CAT-5e cable should I be using?
Solid core CAT-5e cable rated at 350 Mhz 568a or 568b is the minimum requirement.
CAT-6 cables are also a viable cable to use. Higher resolutions and transmission lengths
greater then 80 feet might require low skew cables for optimum performance.
I’m getting no video on the screens, what can I check?
First thing to check is make sure that the video CAT5 is linked to the other video CAT5
port and the same with the DDC ports. Test to make sure the units are working with short
CAT-5e cables 15-20 feet. Units shipped starting 12-2005 have the service switches inside
the unit enabled. Please refer to the Service Switch Usage Guide on page 5.
How can I x the ickering picture?
Flickering or a Blinking image is the result of a loss of sync between the display and the
source. Try lowering the resolution to see if that helps, if it does, the CAT-5 cables you are
using are unable to handle the bandwidth of the higher resolution and thus you are losing
sync. Try a shielded CAT-5e cable on the DDC to reduce interference.
Why is there a green or pink tint to my picture?
A tint of green or pink in the picture is a result of incorrect colorspace being transmitted.
This can be resolved by recycling power on your devices including the extender. If this
does not help, the DDC data containing the colorspace is not being transmitted correctly
due to loss in the CAT5 cable, try replacing the DDC cable.
TROUBLESHOOTING
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