General Description - LG KP550 Service Manual

3.17 General Description

The RF transceiver (PMB 6272 SMARTi-PM) is an integrated single chip, quad-band transceiver for
GSM850/GSM900/GSM1800/GSM1900 designed for voice and data transfer applications.
The transceiver provides an analog I/Q baseband interface and consists of a direct conversion
receiver and a quad-band polar transmitter for GSM and EDGE with integrated PGA functionality.
Further on a completely integrated SD-synthesizer with HSCSD and GPRS/EDGE capability, a
digitally controlled reference oscillator with three outputs, a fully integrated quad-band RF oscillator
and a three wire bus interface with all necessary control circuits complete the transceiver.
Figure 24 RF transceiver PMB6272 SMARTi-PM functional block diagram
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Only for training and service purposes
3. TECHNICAL BRIEF
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