... . Low cost 3. Self-excitation protection KFZF-Ⅰ-850 TV Gap Filter, is the fourth generation of terrestrial digital broadcasting TV transmitting ... .5. Modular structure, easy installation and maintenance;6. Adopts strict cavity filter, ensure perfect out-band suppression.7. Multiple power supplies, -48VDC ... %Outdoor type: ≤95% (waterproof measure)Atmospheric pressure86~106kPa TV Gap Filter (TV Repeater)