* On 2013 16 Jul 14:31 -0500, Ken G Kopp wrote: > VHF/UHF aircraft radio has always been AM, and is likely / certain > continue to be. Why? It's used world wide and discussions about > changing it to FM have continued for years. The conclusion seems > to be that there is simply too much usage worldwide and little reason > to make the change. The cost to change to another mode would be > horrendous! Of course manufacturers would -love- to see the change.
>From a coworker that worked in avionics years ago one reason can be summed up in two words--capture effect. As AM does not have it, an air controller can tell when two aircraft transmit at once, much like on HF SSB for us. Beyond that and I would be into speculation. 73, de Nate >> -- "The optimist proclaims that we live in the best of all possible worlds. The pessimist fears this is true." Ham radio, Linux, bikes, and more: http://www.n0nb.us ______________________________________________________________ Elecraft mailing list Home: http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/mmfaq.htm Post: mailto:[email protected] This list hosted by: http://www.qsl.net Please help support this email list: http://www.qsl.net/donate.html
