I just bought a Samsung DTB H260F HDTV receiver and hooked it up to an analog tv. Have a CM4228 antenna & get crystal clear analog UHF reception where I'm pointing. When I turn the HDTV receiver on, I can tell by the TV screen something's happened, but actually see nothing & cannot access any menus. Pretty certain it's hooked up correctly & have tried different switch settings on the rear panel. Any suggestions?