Conditions of UHF range communication systems development require broadband receiving filters with U-shaped characteristic. Moreover, the more receiving channels you have, the wide band must be.
Our preselectors PS4-4(8)U, thanks to modular design, enable to increase the number of channels adding additional filters and conducting necessary adjustment.
These filters provide repeater operation trough common antenna without duplexer used, at standard 10 MHz frequency separation.
Preselectors typical gain-frequency characteristics