Superheterodyne Base Station Transceiver Part numbers link to product information Filter LNA LNA Limiter Filter Mixer ADC Ceramic BPF Balun 0 90 RF In Atten 0 180 Balun ADC Atten Cont 1 Atten Cont 2 LO Select Atten Balun Ceramic BPF Balun ADC 0 180 Rx LNA Limiter LNA Filter LO 1 LO 2 0 90 ADC Dual Fractional-N Synthesizer / PLL Direct Quadrature Demodulator PLL SPDT PLL Coupler Coupler High Gain Linear PA Module PA Driver Buffer Amp DAC Ceramic BPF Tx 0 90 High Gain Linear PA Modules Mixer/ Upconverter DAC Direct Quadrature Modulator