> 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
