Well I have bad news and good news. Might as well start with the bad news first...
a.
Harford County's trunk rebanded some time ago. What this means for you is that the original firmware of the 996T can't trunk this system. But this can be corrected.
b. Baltimore County's system is VERY fickle - it's set up with a different modulation scheme and towers that separate the system into zones. Not everyone has had much luck monitoring the County system with a clean signal, and in Harford, it's quite possible you are out of range.
In any case, here's a very good explanation of the Baltimore County setup (all links are always blue, by the way)...
Baltimore County (P25) System Information - The RadioReference Wiki
Now for the good news...we have extensive articles in our wiki to help you along. Unfortunately the process of updating the firmware is a royal pain in the arse - but as long as you follow the directions TO THE LETTER you should be fine.
You will also need a USB-serial cable to connect the scanner and PC. We also have a good deal of information on that topic - particularly with regards to
Windows 8.x issues - in our wiki. There are several off the shelf models that are known to work
We also have a very good article on how to program your scanner - although it seems like a heckuva lot to handle at first. I would start by getting a USB cable connected up and doing the firmware update. Then someone can send you a file with the data you need. No need to meet someone or pay someone to do it for you (and unlike the RS/GRE scanners, there is freeware available for these scanners).
Anyway here are the links...
Updating the Firmware in Uniden DMA Scanners - The RadioReference Wiki
Program your DMA Scanner - The RadioReference Wiki
Don't try to read the Uniden mess of a manual. The Easier to Read guides (which are linked at the bottom of the 2nd article) are a much better way to go.
GL...Mike
