The 3NF-1800/2200-S from Lorch Microwave is a Tunable Filter with Frequency 1.8 to 2.2 GHz, Bandwidth 4 MHz, Input Power 50 W, Insertion Loss 1 dB. Tags: Module with Connectors, Mechanically Controlled, Digitally Controlled. More details for 3NF-1800/2200-S can be seen below.