Reply To: P25 and C4FM Analysis for Spike

Hi A.J.,

Thank you for the reply. After checking out the interface again, all the necessary parameters for diagnosing P25 do indeed seem to be there, albeit slightly different nomenclatures for general (X)FSK.

RMS Deviation Error = RMS FSK Err(%)
Frequency Error = Carrier Offset
Symbol Deviation = Average Deviation

A Filter Alpha of 1 will work best with C4FM. The only thing which is lacking for complete analysis is the Symbol Distribution Table (reference in my video link). With the addition of that, it would be complete for P25 troubleshooting.

Great work so far, and very glad to have this added functionality in Spike!

Rob