I have always wondered if a unique code could be used by the transmitter and learned by the reciever. A serial number for instance. I do not know what restrictions there would be to this as far as transmitting data but I would think that it would be possible. Then only one frequency would be necessary and the reciever would only accept comands from the correct transmitter after being programmed. Just a thought, now somebody make it so!! ; ) Mike
----- Original Message ----- From: "Simon Van Leeuwen" <[EMAIL PROTECTED]> To: "Tripp Meister" <[EMAIL PROTECTED]> Cc: "Bill Swingle" <[EMAIL PROTECTED]>; "Martin Usher" <[EMAIL PROTECTED]>; "RCSE" <[EMAIL PROTECTED]> Sent: Thursday, June 03, 2004 6:02 PM Subject: Re: [RCSE] Electronics - New Stuff > <grin> excellent question! As Martin points out, the inconsistencies > within the transmitted packet and/or off-center carrier frequency > recognition would be difficult to ascertain from a synthesized TX and > allow this type of RX technology to perform properly. > > More interestingly to me would be deliberate (minor) packet/carrier > changes that would allow this type of RX we are talking about the unique > opportunity to actually receive a somewhat unique signal! > > During production, the TX software would change just slightly - to allow > these unique RX's to easily indentify and store the unique signature) > "X" number of times during a production run. As product is distributed > around the world, incremental runs with differing S/W would go out to > different vendors. The idea being, in any given area PLL/algorithm-based > RX's would be programmed by endusers to differing TX's in the same > area/flying fields. > > Chances would be excellent that no one at your particular field would > have the same software, be flying at the same time, or even on the same > frequency! Voila...unique and more secure from on-frequency interference. > > Tripp Meister wrote: > > > Is there such thing as a finger print to Synth Tx's? Being that they > > are digital and not having a xtal do you still have this finger print? > > > > -----Original Message----- > > From: Bill Swingle [mailto:[EMAIL PROTECTED] > > Sent: Thursday, June 03, 2004 8:23 AM > > To: Simon Van Leeuwen; Martin Usher > > Cc: RCSE > > Subject: Re: [RCSE] Electronics - New Stuff > > > > Assuming the fine accuracy of this new Receiver: > > > > How stable are our Transmitters? Over time, temperature, physical shock, > > altitude(?) or whatever? > > > > Is it possible the transmitter signal could change enough that the Rx > > would cease to recognize it's "fingerprint"?? > > > > Bill Swingle > > Janesville, CA > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" > > and "unsubscribe" requests to [EMAIL PROTECTED] Please note > > that subscribe and unsubscribe messages must be sent in text only format > > with MIME turned off. > > > > > > > > RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off. RCSE-List facilities provided by Model Airplane News. Send "subscribe" and "unsubscribe" requests to [EMAIL PROTECTED] Please note that subscribe and unsubscribe messages must be sent in text only format with MIME turned off.
