p25 cqpsk

BLUF: Why can I receive a P25 channel regardless of the modulation type (C4FM vs CQPSK) but while scanning the radio will only land on this channel if the modulation is set to CQPSK? ~~~~~~~~~~~~~~~~~~~~ I have an Astro Spectra that mostly gets used as a scanner for conventional channels, a...

Frustrated with Oakland P25 CQPSK Modulated system. the multi-path problem with this system brought back memoirs of an antenna I once saw which dealt with interference. The antenna was "can" shaped unit mounted horizontally on a TV type mast. It was about a foot long and six inches in diameter...