DBSPECTRA's ATS4TMA4-4-R, 456 – 460 MHz tower top amplifier 16 gain, 15 VDC, 14 dB return loss. Built-in quadrature amplifier of 46 dBm for better reliability, lower noise, and higher IP3. Excellent filtering before LNA for receiver system protection. Aluminum canister design for less wind loading and better weather protection. Receive signal improvement for long coaxial cable runs. Automatic bypass of a top amplifier. Includes test port-signal injector, which provides for second transmission line input for testing with control to switch in test port.