If options do not appear, click inside box to show options. Select Contour Type: F(50,50) Service Contour (FM) F(50,10) Interfering Contour F(50,90) Digital TV Service Contour Select Channel Range: (not TV virtual channel) FM Radio or TV Channels 2-6 TV Transmit Channels 7-13 TV Transmit Channels 14-69 Find This: Field Strength, given a Distance Distance, Given a Field Strength FM ERP, given Distance and Field Strength Effective Radiated Power: (ERP) kW Height Above Average Terrain: (HAAT) meters Distance: km Field Strength: dBu Results: