A video sender is a device for transmitting domestic video signals wirelessly from one room to another, as for example sending the output of a satellite TV decoder located in the lounge, to a television set in the bedroom.
Some video senders also incorporate a return path, to permit infrared remote controls to operate the equipment whose output is being sent.
The equipment requirement is usually either SCART (Europe) or composite video.
Video senders are usually analogue TV, and may be subject to RF interference from other household wireless appliances such as cordless telephones or wireless networks. These devices are also one of the main causes of interference to WiFi networks. More information can be found in the article on electromagnetic interference at 2.4 GHz.
To avoid this, some video senders now use the less-used 5.8GHz ISM band, but these are not legal in all the countries that use 2.4GHz ISM for videosenders.
They can suffer interference from WiFi, or disrupt WiFi. See for explanation and mitigation
Usually there are four FM transmit channels, A, B, C & D, with L & R audio on 6.0MHz and 6.5MHz FM subcarriers added to the composite video baseband. The reverse remote control channel is usually 433.92MHz, fixed, using whatever modulation is on the 34kHz to 45kHz IR remote "carrier". ASK/OOK schemes such as RC5 and RC6 work best over the RF link as the receiver uses a data slicer and AGC designed for ASK/OOK with Manchester encoding.
Famous quotes containing the words video and/or sender:
“We attempt to remember our collective American childhood, the way it was, but what we often remember is a combination of real past, pieces reshaped by bitterness and love, and, of course, the video past—the portrayals of family life on such television programs as “Leave it to Beaver” and “Father Knows Best” and all the rest.”
—Richard Louv (20th century)
“Love that comes too late,
Like a remorseful pardon slowly carried,
To the great sender turns a sour offense,
Crying, “That’s good that’s gone.””
—William Shakespeare (1564–1616)