DirecTV A3-KaKu HD Installation Training, Process And Set Up page 35

B-Band Conversion
Confidential & Proprietary
•BBC (B-Band Converter)
• Ka LNB frequencies are between 250Mhz and 750Mhz
• H20 is unable to view these frequencies
• BBC up-converts the B-Band into a 1650-2150Mhz usable spectrum
• Must be used for all H20 IRD's and is included in the package