Active antenna Application: Active antenna, built-in digital radio frequency amplifier Specifications: Impedance: 50/75 ohms typical value. Receiving frequency range: III band 170-240MHz L band 1452-1492MHz Power supply voltage: DC5V/DC12V+/-10% from the tuner Working current: 20mA~30mA Ensure temperature during operation. Range: -20 ° to+60 ° Store to ensure temperature. Range: -40 ° to+85 ° V. S.W.R. < 2 Gain: 15dB ± 3dB (III band), 18dB ± 3dB (L band) Cable specification: RG174 with power cord