... power doubler unidirectional trunk amplifier 2.◊◊ represent the amplifier gain, maximum optional 26dB,28dB,32dB3. The maxium frequency ... optional 550MHz, 750MHz, 860MHz4. 0-20dB adjustble attenuator and 0-20dB ajustable equalizer5.Quality switching power supply, the ... parametersWorking band(MHz)45~75045~860MarkNominal gain(dB)26,28,320dB attenuate and equalizerStandard Operating Level(dBμV)98, ...