A guide to digital wireless video senders
What is a wireless audio / video (AV) sender?
An AV sender transmits signals from video and audio equipment such as hifi, camcorders, dvd players, freeview, cable TV or satellite from their source to anywhere else in your home.
This means that you can watch satellite TV, for example, on any other TV in your house without the need for untidy and expensive cabling. Note though, that the satellite channel that you will be watching will be the same as the main source.
How does it work?
It works by sending (tranmitting) the signal from your DVD / Freeview Box/ Cable TV/ satellite system etc using radio waves. You can even change the channel on the source unit from wherever you are by means of a remote control, as most audio/video senders come complete with a remote control extender, so tranmit the remote signal to the original source.
Some systems such as Virgin Media and Sky have a few anomalies, so check the system that you are about to buy is compatible with the system you are going to use it with.
Is it difficult to set up?
No, not at all. You need to connect your electrical equipment to the wireless video sender via the SCART lead. A receiver is similarly connected to the equipment you would like to receive the signal on via another SCART lead. The signals pass through floors and walls. However, you should check that you are using the correct SCART cable for transmitter and receiver, as these may be different.
Whilst you only need one sender for the source signal, each device which will be receiving the signal will require a separate receiver.
How far are signals transmitted?
A standard unit will transmit a signal for an average of about 30m. However, long distance transmitters are available that can tranmit a signal up to either 1000m or 5000m if there are no obstructions - although concrete floors and walls will reduce this distance. The units in general can operate on one of three or four different frequencies - so if your neighbour has a similar device and you don't want to watch what he's watching, you can switch your device over to a different frequency.
Where are the best places to buy?
Maplin have a good range of wireless video senders - simply search on "wireless sender" from the home page to view the current selection. Their range includes long distance, PC to TV and four input devices. Also Amazon are displaying some items from their current range in the column on the right.