The FN-U-X3L1-24147-XXS5 from ETL Systems is a Block Upconverter with AC Voltage 85 to 264 VAC, Gain 0 to 30 dB, Gain Flatness ±0.25 to 1 dB, Image Rejection 60 dB, Impedance 50 Ohms. Tags: Rack Mount. More details for FN-U-X3L1-24147-XXS5 can be seen below.