Read and understand this about Real and Virtual digital tv channels.
forum.tvfool.com/showthread.php?t=695 . I see 2 WIAT CBS'S at different locations , Tvfool is not 100% accurate , past experience at other posts and locations is one will be an active transmitter and the other will not. . The WIAT at 71 degree magnetic compass is showing the Real channel as UHF 30 and the Virtual channel as UHF 42.1 . . The WIAT at 144 magnetic compass is showing the Real channel as UHF 42.