Don't forget that only HALF of the D-Star's 4800 signal is used for voice data, so you have effectively 2400 used for voice.
Joe M. Nate Duehr 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... > > My opinion only... > > -- > Nate Duehr, WY0X > > > Yahoo! Groups Links > > >
