At 5/30/2007 01:10 AM, you wrote: > > While the typical 50 dB analog NBFM (5 kHz deviation) bandwidth is > > ~20 kHz, > > the 50 dB bandwidth of DStar appears to be about 10 kHz. Here in > > SoCal > > we're proposing 10 kHz channel spacing for DStar, digital P25 & any > > other > > "very narrow band digital voice", or VNBDV, systems. > >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.
Sounds like DStar MAY have an edge over P25 Phase I, at least in terms of occupied bandwidth. >(Good luck finding test equipment that supports D-Star. Ever.) I guess you weren't at Dayton. Bob NO6B
