The Electro-Voice RE3-ACC-ALPA is an active UHF log-periodic directional antenna designed to extend the range of RE3 wireless microphone systems. Operating across a wide 470–960 MHz frequency range, it features selectable 3 dB or 10 dB of active gain to boost desired RF signals while rejecting unwanted signals from other directions. Its 100-degree effective working angle helps focus reception toward the transmitter's location. The ALPA features a BNC connector and mounts on a standard threaded microphone stand for flexible placement. For optimal performance, it is recommended for use with high-quality, low-loss Electro-Voice CXU coaxial cables. An optional RE3-ACC-RFAMP booster can be added in line for additional RF gain.