Enter the zipcode. then select services. Make sure you have Dispatch, Tac and Talk for each of the following: Law, Fire, EMS.
When the radio is scanning see if it pauses on "State Of Delaware Public Safety" system for a couple of seconds and press it to hold on just the DE state system.
That should do it. I believe you should get ok reception from Bethany with the stock antenna.
The signal strength indicator is to the left of the battery icon. You want to have at least 2 bars. You might have to play with antenna placement a bit to get good reception.
If bad sound were fatal Audio would be the leading cause of death!