The U6.28 from GeoSync Microwave is a Block Up Converter with IF frequency 950 MHz to 1.825 GHz, RF/Output Frequency 5.85 to 6.725 GHz, LO Frequency 4.9 GHz, P1dB 13 dBm, Output Power 13 dBm. Tags: Rack Mount. More details for U6.28 can be seen below.