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3.2.1. RF Front End
RF front end consists of Front End Module(FL400), quad band LNAs integrated in transceiver(U400).
The Received RF signals (GSM-850 869MHz ~ 894MHz, EGSM 880 MHz ~ 960MHz, DCS 1710 MHz
~ 1880 MHz, PCS 1930MHz ~ 1990MHz) are fed into the antenna or mobile switch. An antenna
matching circuit is between the antenna and the mobile switch. The Front End Module(FL400) is used
for control the Rx and TX paths. And the input signals ANT_SW1 , ANT_SW2 and ANT_SW3 of a
FL400 are directly connected to baseband controller to switch either TX or RX path on.
Front End Module(FL400) is an antenna switch module for Quad band phone. The logic and current is
given below Table 3-2.
ADC
ADC
ADC
ADC
Di
gita
l Fi
lter
Di
gita
l Fi
lter
DAC
DAC
DAC
DAC
LOW
IF
LOW
IF
D
I
P
D
I
P
GSM
850
DCS
FL400
Front End Module
26MHz
I
Q
U400/Si4210
VCO + FREQUENCY
SYNTHESIZER
VCO + FREQUENCY
SYNTHESIZER
0 /
90
0 /
90
PGA
PGA
X400
VC-TCXO
GSM
850
DCS
PCS
LNA
Baseband
(TI)
U101
(Calypso)
+
U100
(IOTA
Shrink)
Baseband
(TI)
U101
(Calypso)
+
U100
(IOTA
Shrink)
PCS
EGSM
EGSM
Figure 1. RF Receiver Block
Table 3-2. The Logic and Current
GSM900 Rx
DCS1800 Rx
GSM850 Rx
Tx 2GHz
Tx 1GHz
VC1
Switch Mode
PCS1900 Rx
VC2
VC3
VDD
H
H
L
L
L
L
L
H
H
H
L
L
L
L
H
L
H
L
H
H
H
H
H
H
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Содержание MG210
Страница 1: ...Date May 2006 Issue 1 0 Service Manual MG210 Service Manual Model MG210 Z 3 X B O X C O M ...
Страница 3: ... 2 Z 3 X B O X C O M ...
Страница 5: ...Z 3 X B O X C O M ...
Страница 32: ...3 H W Circuit Description 31 Figure 14 Power Supply Scheme Z 3 X B O X C O M ...
Страница 45: ...4 2 KEYPAD Components Placement 4 TROUBLE SHOOTING 44 U301 MIC200 Z 3 X B O X C O M ...
Страница 46: ...4 TROUBLE SHOOTING 45 4 3 FPCB Components Placement 4 4 Baseband Components LD1 BAT1 CN2 CN3 Z 3 X B O X C O M ...
Страница 87: ...4 TROUBLE SHOOTING 86 Waveform PA_ON VRAMP Z 3 X B O X C O M ...
Страница 91: ...5 DOWNLOAD 90 5 2 Download Procedure 5 2 1 Computer Program file MultiGSM exe Click Z 3 X B O X C O M ...
Страница 93: ...5 DOWNLOAD 92 5 2 3 Configuration Setting C GSMULTI Model MG210 dll Z 3 X B O X C O M ...
Страница 94: ...5 DOWNLOAD 93 5 2 4 Press Start Button MG210 Z 3 X B O X C O M ...
Страница 95: ...5 DOWNLOAD 94 5 2 5 After Start Button Which Stand by condition MG210 Z 3 X B O X C O M ...
Страница 96: ...5 DOWNLOAD 95 5 2 6 SW downloading Condition MG210 Z 3 X B O X C O M ...
Страница 97: ...5 DOWNLOAD 96 5 2 7 SW downloading END Condition MG210 Z 3 X B O X C O M ...
Страница 100: ...6 SERVICE AND CALIBRATION 99 4 Click on CALIBRATION START button MG210 MG210 Z 3 X B O X C O M ...
Страница 101: ... 100 Z 3 X B O X C O M ...
Страница 106: ... 105 8 pcb layout Z 3 X B O X C O M ...
Страница 107: ... 106 8 pcb layout Z 3 X B O X C O M ...
Страница 111: ... 110 Z 3 X B O X C O M ...
Страница 126: ...Note Z 3 X B O X C O M ...
Страница 127: ...Note Z 3 X B O X C O M ...