LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
3. TECHNICAL BRIEF
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3.1 GENERAL DESCRIPTION
The KC910 supports UMTS-900, UMTS-2100, GSM-900, GSM-1800, and GSM-1900 based
GSM/GPRS/EDGE/UMTS. All receivers and the UMTS transmitter use the radioOne
1
Zero-IF
architecture to eliminate intermediate frequencies, directly converting signals between RF and
baseband. The quad-band GSM transmitters use a baseband-to-IF upconversion followed by an offset
phase-locked loop that translates the GMSK-modulated or 8-PSK-modulated signal to RF.
1
QUALCOMM’s branded chipset that implements a Zero-IF radio architecture.
3. TECHNICAL BRIEF
MSM6280
[W-PAM]
RF5184
RTR_TXIP//TXIM,
RTR_TXQP//TXQM
[GSM PAM]
TQM7M5012
DCS_PCS_TX
EGSM_TX
RTR6285
3
[FEM]
D5015
Epcos
DCS_PCS_TX
EGSM/DCS/PCS RX
Coupler
(20dB)
EGSM_TX
WB_MX_INP
WPRXSE2_OUT
W2100_TX
RTR_RXIP//RXIM,
RTR_RXQP//RXQM
I_IP_CH0
I_IM_CH0
Q_IP_CH0
Q_IM_CH0
I_OUT_P
I_OUT_N
Q_OUT_P
Q_OUT_N
Rx_WCDMA_2100
WPRXSE2
WB_MX_INM
SSBDT_RTR
RTR_TX_ON
RF_ON
PDET_IN
RTR_DRXIP//DRXIM,
RTR_DRXQP//DRXQM
I_IP_CH1
I_IM_CH1
Q_IP_CH1
Q_IM_CH1
[LNA Module]
GPS_IN
HB_RF_OUT3
LB_RF_OUT2
SAYZ1G95EA0B00
B7681
Coupler
(20dB)
Rx_WCDMA_900
W900_TX
PM6658
Input Power
Management
Voltage
Regulators
General
Housekeeping
User
Interfaces
IC
Interfaces
RTR6285_TCXO
MSM_TCXO
VCTCXO
(19.2MHz)
[Figure 1-1] Block diagram of RF part