On Tue, 2009-07-07 at 09:55 -0400, Bob Bruninga wrote:
Sorry, one can also claim that every transmission is one-way because only under full duplex conditions is a system truely two-way. There are all kinds of applications in amateur radio where one side of the link uses different hardware than the other return side, and once can make all kinds of arguments as to how much delay is involved between the transmission and the receiption.. 3 seconds? 10 seconds, a minute? 10 minutes? A day? When you make a call to a party TO ESTABLISH commmunications it is one way, until the person gets his system going and responds.
A good example of this is the amateur satellites. You might fire an email off to someone - "I heard you but you couldn't hear me" after the pass. I think you'd have a hard time describing that as anything other than a one-way radio communication, but I don't see where that would become illegal.
Gordon 2M0YEQ