Welcome to RR. In order to give you specific advise, we would normally need to know your state, county, and any nearby cities of interest. Mankato shows up in both KS and MN, so you should edit your profile to include the state & county to assist you with future questions you might have. However, your mention of Allied Radio Matrix for Emergency Response (ARMER) tells me it is Blue Earth County MinnesotaMy area is switching to the armer system i believe. I want to buy a new scanner but they seem to be getting more complicated i dont know exactly what to look for. Any advice?