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Tech Head - The Technology Section
Terrestrial & Satellite TV Hacking
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<blockquote data-quote="Hixxy1" data-source="post: 863638" data-attributes="member: 389960"><p>They use c&k horns nicked from traffic lights or alarm sensors driven by a simple modulation circuit using just a couple of parts. They us a simple sat can on the receive end and the audio is taken from the baseband output. The bandwidth is sufficient to send multiplexed stereo and rds, eliminating the need for extra modules on the transmitter side. </p><p></p><p>The reason for using blue caps on the receive end was down to the gain and good audio quality. Certain types could be modded to transmit but it's far easier to use the modded horns. Universal lnbs are mostly use to receive as the blue ones are hard to get hold of. </p><p></p><p>Midpoints are another tower block which receives the first link and retransmits it to where the transmitter is. Some receive microwave and then rebroadcast on band 1 to the transmitter making it even more difficult to track the studio. </p><p></p><p>There's all sorts of simple but effective techniques they use like having a fm receiver with the stereo light connected to a relay which in turn switches the link tx off if the main transmitter goes off air. They can also switch the transmitter on and off remotely by send a sub audible tone through the audio feed. Pretty basic stuff when you think about it. </p><p></p><p>I can talk about pirate radio all day long <img src="https://www.satellites.co.uk/styles/default/xenforo/smilies/smile.png" class="smilie" loading="lazy" alt=":)" title="Smile :)" data-shortname=":)" /></p><p></p><p></p><p></p><p>Sent from <a href="http://tapatalk.com/m?id=1" target="_blank">Tapatalk</a></p></blockquote><p></p>
[QUOTE="Hixxy1, post: 863638, member: 389960"] They use c&k horns nicked from traffic lights or alarm sensors driven by a simple modulation circuit using just a couple of parts. They us a simple sat can on the receive end and the audio is taken from the baseband output. The bandwidth is sufficient to send multiplexed stereo and rds, eliminating the need for extra modules on the transmitter side. The reason for using blue caps on the receive end was down to the gain and good audio quality. Certain types could be modded to transmit but it's far easier to use the modded horns. Universal lnbs are mostly use to receive as the blue ones are hard to get hold of. Midpoints are another tower block which receives the first link and retransmits it to where the transmitter is. Some receive microwave and then rebroadcast on band 1 to the transmitter making it even more difficult to track the studio. There's all sorts of simple but effective techniques they use like having a fm receiver with the stereo light connected to a relay which in turn switches the link tx off if the main transmitter goes off air. They can also switch the transmitter on and off remotely by send a sub audible tone through the audio feed. Pretty basic stuff when you think about it. I can talk about pirate radio all day long :) Sent from [URL=http://tapatalk.com/m?id=1]Tapatalk[/URL] [/QUOTE]
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Terrestrial & Satellite TV Hacking
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