Narda West's AMPS B Band Duplexer provides highly selective receive/transmit combining. These
Duplexers are designed to pass the AMPS B and B' receive bands of 835–845 and 846.5–849
MHz and the transmit band of 880–890 MHz and 891.5–894 MHz while providing more than 75
dB isolation. Units have a passive intermodulation rating of -110 dBm with two 43 dBm carriers.
A monitor port which offers a -50 dB coupled signal for power monitoring is standard.