The BU81 from Novella SatComs is a Block Up Converter with IF frequency 1 to 2.1 GHz, RF/Output Frequency 17.3 to 18.4 GHz, LO Frequency 16.3 GHz, P1dB 10 dBm, Output Power 10 dBm. Tags: Module with Connectors. More details for BU81 can be seen below.