BPF4900A 4.9 GHz Ultra High Q 4-Pole Outdoor Bandpass Filter, Full BandProduct Datasheet The HyperLink 4. 9 GHz 4 Pole Ultra High Q full band channel filter is ideal for co located equipment installations. This filter is designed for full band applications. By reducing interference outside the 4. 9 GHz band, improved performance of co located equipment can be achieved. These bandpass filters are wide enough to pass high data rate signals without degradation. The BPF4900A features rugged aluminum weatherproof construction