Stuart, what bandwidth do the Public Service people use on their digital systems? And let me ask you my earlier question: what happens on digital voice when you decrease the bandwidth on reception? Can you significantly improve signal-to-noise by narrowing the bandwidth (with only a loss of fidelity)? Or does digital voice have no tolerance for bandwidth reduction; that is, you need basically all of the bits in order to provide intelligible audio out.
Mike W5FTD > Absolutely good points about the fail soft nature of analogue signals. > While the new digital systems usually have a threshold, and fail hard, ie, > the message does not get thru even partially, after a certain loss of signal > point! > This is why analogue ham communications get thru in disasters, and many > Public Safety systems do not, as they depend more and more on go/ no go > digital systems. > -Stuart > K5KVH > retired fireman _______________________________________________ Elecraft mailing list Post to: [email protected] You must be a subscriber to post to the list. Subscriber Info (Addr. Change, sub, unsub etc.): http://mailman.qth.net/mailman/listinfo/elecraft Help: http://mailman.qth.net/subscribers.htm Elecraft web page: http://www.elecraft.com
