I use a pro 106 while on the job to monitor other law enforcement agencies operating in my area. I purchased my digital scanner from my local radio shack and they said they programmed it using radio reference. They told me that there were some issues with not being able to recieve all traffic transmitted. The issue I have is that I recieve almost all traffic put out by EMS but receiving law enforcement is hit or miss. One end of the city seems to recieve better than the other and one day will be better than the other making me wonder if weather and atmosphere conditions are affecting the receiving capability of the scanner. The other agency is on the p25 system and they have problems of their own transmitting and receiving in certain areas of the county that they should not but they do. I have set my scanner to only scan the digital frequencies associated with emergency services in this area but at times there is what seems to be a delay in picking up the transmission so I only get partial traffic coming through. Most importantly is it likely to be an antenna issue, programming issue, or just something that happens that cannot be fixed.