NB: Here we use the term "VGA" to mean VGA-style connections of any resolution over a high density 15-pin connector. This includes XGA, UXGA, WXGA and so on.

VGA cables (top left) were designed to connect a computer to a monitor, ie a distance of a metre or so. While you can easily buy VGA type cables up to 50m or so, long VGA cables can significantly deteriorate picture quality. There are huge variations between manufacturers, but generally a long VGA cable on its own is a bad idea – your image quality will suffer.

Booster amplifiers (top right) are available that can compensate for long video cabling and give good results over tens of metres (it is difficult to be precise about how far you can go as it depends on the resolution you are using and the quality of the cable).

There are many free-standing models such as the ones illustrated below and there are also versions designed to mount in floor boxes or wall boxes to provide a discreet and elegant means of building connectivity into meeting rooms and lecture rooms.

 

 

 

 

 

 

 

 

 

 

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