When trying to monitor Ameristar Casino, in St Charles, its listed as just a conventional uhf system. I keep locking up on 462.200 and 462.175 with a "buzzing" sound or a saw mill sound. Its sort of like a control channel p25 though I have created systems from everything Freescan allows. Has anyone heard the sounds or can tell me if its monitorable. what system am I listing too.