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SAMSUNG SGH-2488 GMS.pdf | | DUAL BAND Mobile Cellular Phone
SGH-2488
SERVICE
1 4 GHI 7PQRS
2ABC 5 JKL 8TUV 0
3 DEF 6MNO 9WXYZ
RxEGSM (925~960MHz) GSMTX2 DCSTX2 GSM F301 SAW LNA RxEN_FEGSM U300 F302 SAW F300 BPF 246MHz
DEMODEN
VMID IRXP
F305 O° BPF VGA PLL RXLO2 259MHz 90° QRXP U301 TXEN1 RXLO3 13MHz
U401
Q300 F303 SAW LNA
RxEN_FEDCS U305 F304 SAW
RXLO1GSM 1171.2~1205.8MHZ BANDSEL PLLEN DUAL PLL VCO
Ref Osc
REF 13MHz
DCS RxDCS(1805~1880MHz) RXLO1DCS 2051.2~2125.8MHz Dip. DCSTX1 GSMTX1
EGSM:493~518MHz DCS:498~519MHz X2 TXEN1 QTX QTXI ITX ITXI
DUAL VCO
EGSM:1171.2~1216MHz DCS:2019.2~2125.8MHz
TXEN1
GSMTX2 DCSTX2 GSMPAM U402
Dip.
BPF
Mod.
TxEGSM(880~915MHz) U405 DUAL COUPLER TxDCS(1710~1785MHz) DET.
X500 PA VCO LPF VCO PA U500 PDF 1/3 DCS:310.8MHz GSM:295.8MHz 1/5 BPF
DCSPAM U408 OP amp
X501
TXPOWER
SYSTEM CLOCK
GSM/DCS Memory VOCODER
SIM Card Serial Data Interface
+3V SIM Card
+5V SIM Card I/O Interface B.B Interface A/D Interface Battery Voltage
32M FLASH + 4M SRAM
Battery Temperatu |
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