Functional Description Receiver

Nokia Nhx 2nd Schematic Diagram

The antenna switch connector connects an antenna or a cable to the PCB. Fixed to the PC Card mechanics, the connector's function is also to launch the received signal from antenna to the microstrip environment on PCB. The microstrip takes the received signal first to the duplex filter, that passes the signal to the receive RX arm of the transceiver. Another function of the duplex filter is to reject the RF spectrum outside the RX band. The signal is then amplified by a low noise preamplifier....