Maxon Electronics Australia Pty. Ltd. MM-5500U 用户手册
FCC Documentation- MM-5500U CDMA 1x/EVDO Modem
22/22
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The transmitter IF VCO is set to 267.2 MHz by an external varactor-tuned resonant tank circuit. An
internal phase-lock loop and external loop filter network provides the feedback to the varactor that
tune the VCO precisely to 267.2 MHz. A master-slave divide-by-two circuit generates I and Q signals
in precise quadrature for the mixers.