FLR-PSA
Ahh! But what if young FOCAL hides his transmitter into a package full of panties which is then put in the cargo hold of that very UAV then he could have all the knickers he ever wanted! LOL
But with Freq. encoding alternation you have a message with a 'bit' telling the receiver what Freq. your going to next. If F.O.Focal can get his hands on another receiver chip he has the code! Or there are other ways, basically it's another case like the Nazi 'Enigma' machine; they thought the Brits could not break the code, but they didn't know the Brits had just pinched a whole Enigma machine! Or take PRN code used on GPS they said it could not be interfered with but not only can the UK government do it but it just needs a couple of TV transmitters and bad atmospherics to mess it up completely.