If anyone has an extra $35 and a Windows PC, they could purchase a good Nooelec SDR and download free Unitrunker 2 software to map out the system properly - much more precise info can be obtained about system and sites via control channel monitoring software. Another piece of software that many find useful is SDR# or similar spectrum monitoring software. You tune it to a control channel frequency to see if is actually in use, and its relative power level and quality at your receive location. There is a bit of a learning curve and technique involved, but in my opinion a better method to diagnose these types of problems. Plenty of info on this site about how to use these tools.