ColibriDDC HF bandpass filter block

BPF-kit board with HF octave band filters. BPF-kit could be installed inside the receiver's case, with a set of simple manipulation.

BPF-kit works either with RX1 or when RX1 and RX2 are on the same band. If RX1 and RX2 are on different bands, then ColibriDDC uses LPF. It's explained by the fact that RX1 and RX2 are software, not physical receivers.