http://flytron.com/camera-accessories/281-hiddenfpv-video-scrambler.html
Got the email earlier, no idea why you would really want to do that unless your really paranoid :)
Could be a great buy for jweaver :) :)
It's not cheap either! Maybe something to bare in mind when FPV goes underground 8)
not that secure either really.
Interesting - hard to tell but there doenst seem much on the PCB's - is it inverting the video signal or something?
Looks just like 3 diodes on each pcb?
There is a small black chip under the heatshrink as well as the 3 capacitors.
And what's to stop someone with a really big bug up their arse buying one of these to monitor anyone who's using this system on a dedicated "Encrypted FPV monitoring groundstation" ?
:D
Presumably since they are advertised as 'coming as a pair', each 'pair' has a unique key. I like the idea and is something I've wondered if it was possible to do for a while.
Chris
It mentions in the text that anyone with the Rx device can decode the signal, so they are not paired. I suspect it is a simple circuit to remove the sync pulse from the video signal and then re-insert it at the other end, hence, without the Rx device, a TV can't lock on to the signal. Simple to do in software on a small Atmel or PIC chip.
It also says it's analogue, not digital which is why I asked.