According to the Directv lookup for sv channels, the only one you are eligible for is MPT. Put your zip code in the box.
http://www.directv.com/DTVAPP/packProg/svLocalChannels.jsp?assetId=1200076&_requestid=7308529
If you check with the
FCC Significantly Viewed List, you get a different answer. See page 183 for Frederick County, MD.
Frederick
WRC-TV, 4, Washington, DC
WTTG, 5, Washington, DC
WJLA-TV, 7, Washington, DC (formerly WMAL)
WUSA, 9, Washington, DC (formerly WTOP)
+WDCA, 20, Washington, DC
WMAR-TV, 2, Baltimore, MD
WBAL-TV, 11, Baltimore, MD
WJZ-TV, 13, Baltimore, MD
This is my list. I currently do not receive any of the PA stations through Dish. (But I do OTA, except for Channel 6. People living in Philly have a hard time getting 6 since it is actually broadcasting on VHF 6.)
Cecil
WMAR-TV, 2, Baltimore, MD
WBAL-TV, 11, Baltimore, MD
WJZ-TV, 13, Baltimore, MD
+WNUV, 54, Baltimore, MD
KYW-TV, 3, Philadelphia, PA
WPVI-TV, 6, Philadelphia, PA (formerly WFIL)
WCAU, 10, Philadelphia, PA
WGAL, 8, Lancaster, PA