Simulcast seems to be the pick of the month when identifying the reason something doesn’t work. Oh, it’s probably simulcast… Definately simulcast, and so on…
If it’s simulcast, move the antenna, shorten it, eliminate it, substitute a paper clip and see if you can find a “sweet spot”, reception wise. It doesn’t have to be a window sill. (Yes, some houses are wrapped in metal foil backed insulation that will degrade RF. But that will go a long way in determining if it’s simulcast or something else, other issues like what WTP listed.
Most newbies questions relate to being unfamiliar with what to expect. They don’t have a reference to compare to. And that brings up questions such as “Ok, I’m hearing something, but should I be hearing it better? Am I expecting too much? What should I expect to hear? Generally, most questions can be answered. If the agency you want to monitor is just a block or two down the street, it’s a no brainer a scanner should be able to hear it, right? …not necessarily true, but thats what a lot of newbies think. It’s an honest assumption. But that agency, while only a block or two down the street, may not be the site where the antenna for their comms system resides! I wish I had a nickle for every time I’ve heard people mistakenly assume the fire dept building that houses the apparatus or the police dept. building is where the signal emanates from.
Why not post this on the regional board for your state, ask if anyone is near you that has experience with the particular scanner you own and the systems/agencies you’d like to monitor? …possibly a face to face with someone who has experience. It’s amazing what people retain after a “hands-on” session with one who has an understanding of what to expect from the scanner.