A/V Modulators

Analogue & Digital AV Modulators

An A/V (Audio Video) Modulator converts a video and audio signal into one that can be 'tuned in' using your TV. Devices such as DVD players, PCs, CCTV systems typically output a simple baseband signal, i.e. they just send out the video signals and the audio signals. You will need to connect these signals directly to a TV or monitor via a Scart or Phono/RCA cables. This means that only one TV in your system/house can watch these signals.

An AV modulator will convert these simple signals into an RF frequency, similar to what your TV uses via a TV Aerial to receive all of its analogue channels. This means that you will be able to input this modulated signal into your existing TV Aerial system and every TV connected will be able to tune in to the AV source.

This is ideal for CCTV cameras - every flat or room will be able to watch the door entry/garage CCTV camera on their TV. The same can be done with DVD players etc.

New to the market are Digital DVB-T COFDM modulators. All older AV modulators are analogue; this means that the picture will never be as clear as a digital picture and the sound will never be in stereo. The newer DVB-T Digital Modulators overcome this by producing a digital modulated signal similar to the Freeview signal received by your TV. This will give a far superior picture compared to analogue plus the sound can be in stereo. Likewise the modulated signal will be picked up by your TVs digital tuner instead of the older analogue one. The channel will appear in the epg along with all your other Freeview channels. You can often select what LCN (local channel number) the modulated signal will appear at. These digital DVB-T modulators are available in 1, 2 and 4 input versions allowing upto 4 AV devices to be modulated onto just one RF frequency.