At 5/30/2007 14:03, you wrote:
> > Discussion here locally is leaning toward 12.5 KHz spacing for what's > > really needed for P25 Phase I systems, not 10 KHz. The discussion > > was also backed up with tests of real-world BER (bit-error rate) at > > closer and closer spacings (overlapping) by a local Amateur with > > access to the appropriate P25 test equipment. In lab testing, 10 KHz > > spacing and it's effect on P25 BER is not real pretty. > >Replying to my own message because I already deleted Bob's, but his >comment that "D-Star might have an advantage" over P25 because of the >above comment I made, is only half the picture. Occupied bandwidth of >D-Star is lower, but it also *sounds* worse. The CODEC is heavily >compressed, and sounds so bad I wouldn't want to use it for day-to-day >communications... I guess that's a matter of opinion. The demos I've heard sound good to me - I rather like the compression & feel it adds intelligibility. Certainly much better sounding than the Mototrbo demo on the page recently posted here. Bob NO6B
