AverMedia A180(ATSC)

Can’t get AverMedia Card MCE A180 that I have installed on PC to work. Using Vista Premium, installed latest drivers and when it opens on screen it states that “that device is not ready”. Open tools and it doesn’t give me the option to designate wether I am using antenna or cable so can’t search for stations. Do I need cable box between outlet on wall and PC? Card is for digital and HD only, no anolog.