When my local police is having a conversation my pro 197 does not decode both side's of the conversation. One mobile will speak and it is understood well. The other will speak and it is not understood. Both are using the same apco p-25 system . How I know this is my old 785d is decoding both side's of the conversation. This is not a trunked system. So, could anyone help me understand this problem? P.s. I also have the pro 96 and it will decode the same police with no problem.