The 434B Series from TX RX Systems is a Tower Mount Amplifier with Frequency 792 to 902 MHz, IP3 42 dBm, Voltage -48 V, Frequency TX 792 to 824 MHz, Rejection TX 110 to 120 dB. Tags: Low Noise Amplifier, Quadrature Coupled, Automatic Gain Controlled Amplifier. More details for 434B Series can be seen below.