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3. TECHNICAL BRIEF
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
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.
DCS_PCS_TX
EGSM_TX
SAYZ1G95EA0B00
[FEM]
D5015
Epcos
VCTCXO
(19.2MHz)
RTR6285_TCXO
1
QUALCOMM's branded chipset that implements a Zero-IF radio architecture.
Copyright © 2007 LG Electronics. Inc. All right reserved.
Only for training and service purposes
[GSM PAM]
TQM7M5012
EGSM/DCS/PCS RX
3
Rx_WCDMA_2100
Coupler
(20dB)
B7681
Coupler
[W-PAM]
(20dB)
RF5184
PDET_IN
Rx_WCDMA_900
PM6658
Input Power
Voltage
Management
Regulators
[Figure 1-1] Block diagram of RF part
DCS_PCS_TX
RTR6285
EGSM_TX
WPRXSE2
WPRXSE2_OUT
WB_MX_INP
WB_MX_INM
W2100_TX
HB_RF_OUT3
W900_TX
LB_RF_OUT2
[LNA Module]
GPS_IN
General
User
Housekeeping
Interfaces
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3. TECHNICAL BRIEF
1
Zero-IF
RTR_TX_ON
RF_ON
MSM6280
RTR_TXIP//TXIM,
I_OUT_P
RTR_TXQP//TXQM
I_OUT_N
Q_OUT_P
Q_OUT_N
RTR_RXIP//RXIM,
I_IP_CH0
RTR_RXQP//RXQM
I_IM_CH0
Q_IP_CH0
Q_IM_CH0
RTR_DRXIP//DRXIM,
I_IP_CH1
RTR_DRXQP//DRXQM
I_IM_CH1
Q_IP_CH1
Q_IM_CH1
SSBDT_RTR
MSM_TCXO
IC
Interfaces
LGE Internal Use Only
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