I live in the St. Louis Area. I receive my HD signals OTA through a Hughes HD combo OTA/Satellite HD receiver. My second receiver is an old RCA SD unit. When I started to flip channels on the old RCA, the receiver said 2-001 (KTVI-DT), then 4-001 (KMOV-DT), 5-001 (KSDK-DT), 9-001,002,003...