yes i have a pro 433 and when i try to put in certain countys it wont work but when i put in maryland it will scan i live in va i am new to trunking also is smartnet something digital that i cant program
Be more specific about what systems you are trying to program. There are many digital systems in Maryland now, and the 433 won't be able to decode these. Anything that says 'Project 25' is an example.
We have an extensive set of links that would get you started in understanding trunking in our wiki. Stick to the basics and tutorial article in the overview section of: