Hello this may be a silly question but it has had me pulling my hair out for several days, I recently purchased an SDS 200 I did all of the downloads except Waterfall and Proscan. And I cannot receive Fairfield, Vacaville and Suisun city fire depts. These towns are located in the North Bay area of California about 30 miles South of Sacramento These depts share a dispatch frequency, and I cannot receive FF, VV, Suisun city police also, I have redownloaded Sentinel, and added a couple other frequencies in case I messed up somehow, I live 25 miles from the cities, and have set my zip code location etc. Is this an antenna issue or are the depts. difficult to monitor ? Or is it something else ? I currently have a Remtronix 830 antenna on the back of my Sds 200.until I can figure out what roof top antenna I should get. Any help would be be great thank you.