This BPF is intended to use as high quality RX filter, he need to be connected between RX antenna and RX itself. Pass band can be selected by BCD (binary) code with 3.3v or 5v logic level, onboard jumper selectable, see attached pictures. Pass bands is 1.8, 3.5, 7.0, 10.0, 14.0, 18.0, 21.0, 24.0, 28.0 MHz. Input and output impedance is 50 Ohm. Input and output connectors is SMA female. Power supply is 5v 0.1a max. Board sizes is 120×75 mm.
Bandwidth and insertion losses
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