LG KU580 Service Manual - Page 71
EDGE/GPRS/GSM RF block
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3. Technical Brief 3.7.3. EDGE/GPRS/GSM RF block The EDGE/GPRS/GSM transceiver use a digital interface that is shared between receive and transmit data. The receive interface is based on I and Q data and the transmitter interface is based on envelop and frequency data. The quad band EDGE/GSM/GPRS transceiver has the following general features: Power class GMSK low bands: Class 4 (33 dBm) GMSK high bands: Class 1 (30 dBm) 8PSK low bands: Class E2 (27 dBm) 8PSK high bands: Class E2 (26 dBm) Multi slot class 12 (4+4=5) Dual Transfer Mode (DTM) class 9 (3+2=5) Zero-IF receiver • Polar modulation transmitter Figure 3-7-7. GSM Transceiver Architecture LGE Internal Use Only - 72 - Copyright © 2007 LG Electronics. Inc. All right reserved. Only for training and service purposes