BCD396XT Changing Modulation in Digital Systems.

Greetings. I have the BCD396XT and have a question. On pure Project 25 Phase I systems (not conventional Smartzone systems with APCO interface) the modulation defaults to NFM vs FM. Have tried resetting it through the Butel software. The software will switch to FM but it will not change the radio to FM from NFM when sent to the scanner. . It stays NFM. Have tried to switch it directly through the radio but am not given modulation as an option in P25 systems. Does this really matter (as I have been reading that may help with digital decode)? If it does, how can it be changed? Thanks for any help in advance.



Eugene KG4AVE