The B-Band Converter (BBC) module SUP2400 enables H20 H24, HR24 and HR20 receivers to receive HD programming. LOWEST PRICES ON THE INTERNET! Ka LNB frequencies are between 250Mhz and 750Mhz BBC up-converts the B-Band into a 1650-2150Mhz usable spectrum The HR20 requires two B-Band converts, one for each tuner This unit is required to receive the 150 HD stations. The B-Band Converter (BBC) module SUP2400 enables H20 H24, HR24 and HR20 receivers to receive HD programming. The HR20 requires two B-Band converts, one for each tuner BBC up-converts the B-Band into a 1650-2150Mhz usable spectrum