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About 100 feet for minor loss to about 500-700ft for total loss. However VGA signals are extremely volatile to EMI. So shielding, copper quality, and gold plated caps will make a difference.


With good quality, low loss 75 Ohm coax cables, the maximum length can be several hundred feet with a minimal loss. The cable will be expensive, bulky and will need correctly terminating at each end to perform properly. Distances in excess of 400 feet have been handled with this technique with no noticeable losses and without additional hardware drivers. Note that this technique uses four or five separate cables and it is no longer a single VGA cable.


With an additional line driver, total lengths in excess of 1000 feet are also possible.

You may not want to run VGA cable more than 100'. If so use a VGA over Cat6 solution. This will often provide a lower cost solution for long distances but it is important that the CAT6 converter system provides for signal skew adjustment. The adjustment is needed because CAT5 and CAT6 cables are constructed in a way that results in a longer cable length on some signals compared to others. The difference in length is sufficient to be seen as misaligned red, green and blue images on the display. When the adjustment is made, signals are delayed by the correct amount of time to bring the images in line once more. Many of the less expensive VGA over CAT5 systems do not have the adjustment or have a very limited adjustment. Make sure that you are aware of the maximum adjustments available before purchasing.


Note that CAT6 transmission is still using the analog signal and therefore, can suffer similar losses to those seen with co-ax cable.




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Q: What is the maximum VGA cable length between PC and Plasma?
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