The BPF Series are professional quality, VHF/FM & UHF bandpass filters. These filters provide extremely high rejection of out of band signals, adjacent channels. The BPF-a utilizes a high-Q, six-stage bandpass filter and two phase cancellation traps to provide excellent rejection of out of band signals. The BPF-d features a six pole resonator filter section and a four resonator trap circuit, providing superior rejection of the nearest adjacent carriers (upper adjacent picture and lower adjacent sound). The BPF-U passes a single UHF channel and offers excellent rejection of all channels outside the bandpass of the filter. All of these filters provide exceptional selectivity with minimum insertion loss. The BPF-a and BPF-d are housed in a single height, 1.75" high, rack mountable, aluminum chassis. The BPF-U is housed in a rugged, die-cast case that can be antenna or flat surface mounted.