The BU571 from Novella SatComs is a Block Up Converter with IF frequency 975 MHz to 1.975 GHz, RF/Output Frequency 5.725 to 6.725 GHz, LO Frequency 7.7 GHz, P1dB 10 dBm, Output Power 10 dBm. Tags: Rack Mount. More details for BU571 can be seen below.