Wireless TV Transmitter digital / analog

Cordless TV transmitter (also known as the transmitter audio-video receiver, a wireless video transmitter, a wireless AV transmitter or DigiSender) is a device for transmitting audio and internal video signals over the wireless network from one location to another. Most often it is used to transmit the output of the source device, such as a satellite TV decoder to a TV in another part of the property and provides an alternative to cable facilities. A wide range of wireless transmitter TV There are technologies, including analog wireless (radio), digital wireless (spread spectrum, Wi-Fi, UWB) and digital wired (Power Line Communication). Other less common techniques also exist, such as those using the existing Ethernet network. A typical set of wireless TV transmitter comprising a transmitter, a receiver, a magic eye and remote control to select the input.     

  

Video sender was a frequent cause radio frequency interference, in particular, with the basic car keyfobs

overview

Typical wireless , etc. The sender Applications include television broadcast transmission of audio and video signals from the living room to the bedroom or with a surveillance camera on the display, as well as connecting devices with audio, video and requirements for IP (Internet Protocol). Most wireless CCTV systems sender will consist of three separate components, a transmitter, a receiver and a remote control switch (also known as the magic eye or infrared transmitter). The transmitter is responsible for transmitting or broadcasting the connected AV device, while the receiver outputs which transmit audio-video signal to a connected television. The relay allows remote control infrared remote control to operate the equipment, the output of which is transmitted.  

Analog wireless

Analog video sender has the advantage of low cost of production as the audio and video signals modulates a carrier at a frequency of 2.4 GHz or 5.8 GHz. They, however, have an adverse effect leads to a decrease in bandwidth for local Wi-Fi network, and in some cases Wi-Fi network may cause interference on the image signal video sender. More information can be found in the article on the electromagnetic interference in the 2.4 GHz band. To avoid this, some video sender now use spread spectrum technology and can coexist with wireless networks and share the available bandwidth. Usually there are four FM channels, A, B, C & Amp ; D, with stereo sound 6.0 MHz and 6.5 MHz FM subcarrier is added to the baseband composite video signal frequencies. These various channels may often be used to overcome the negative effects of nearby wireless networks. Reverse remote control channel is usually set at 433.92 MHz using any modulation IR remote "media" 34 kHz to 45 kHz. Analog wireless TV senders can reach the typical operating range of up to 60 meters (line of sight) with DVD quality (720x576) resolution video and stereo audio.

Digital wireless

Digital Wireless AV Senders  It is rapidly becoming the most popular solution to combine and use the system on a chip (used for audio and video encoding / decoding) by transmitting a signal, for example, spread spectrum Wi-Fi and ultrawideband.

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Source: Wireless TV Transmitter digital / analog