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Text excerpt from page 24 (click to view)
The RF section consists of two main components: The PMB6610 transceiver and the PMB6618 power amp. In the transceiver the 10.368MHz clock signal SYCL is multiplied to around 1.9GHz using PLL (Phase Locked Loop) control. The TXDA signal is used to control the modulation of this frequency to 1.87GHz to 1.93GHz. Received signals are demodulated, filtered and sent to the BBIC via the RXDA line.