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VX9100
LGE Internal Use Only
Copyright © 2007 LG Electronics. Inc. All right reserved
Only for training and service purposes
1.2.2 RFR6500 – LNA part (U108)
The RFR6500 has cellular, and PCS LNA, respectively. The characteristics of Low Noise Amplifier (LNA) are low
noise figure, high gain, high intercept point and high reverse isolation. The frequency selectivity characteristic of
mobile phone is mostly determined by LNA.
The specification of VX9100 LNA is described below:
Low gain
Middle gain
High gain
Units
Cellular
PCS
Cellular
PCS
Cellular
PCS
Gain
-19
-20
3
-3
14
15
dB
Noise Figure
20
20
4.5
6
1.3
1.1
dB
Input IP3
10
10
5
10
7
3
dBm
Parameter
1.2.3 GPS LNA(U101)
The characteristics of Low Noise Amplifier (LNA) are low noise figure, high gain, high intercept point and high
reverse isolation. The frequency selectivity characteristic of mobile phone is mostly determined by LNA.
The specification of VX9100 GPS LNA is described below
dBm
+7
IIP3
dBm
3.4
1dB compression point
dB
0.77
Noise Figure
dB
13.1
Gain
Units
GPS Band
Parameter
1.2.4 RX RF Dual SAW Filter(F100)
The main function of RX RF SAW filter is to attenuate mobile phone spurious frequency, attenuate noise amplified
by the LNA and suppress second harmonic originating in the LNA.
Summary of Contents for VX9100 Maroon
Page 135: ...1 VX9100 Assembly Disassembly Diagram ...
Page 136: ......
Page 137: ......
Page 138: ...2 VX9100 Block Circuit Diagram Main Key Pad FPCB ...
Page 139: ...Block Diagram ...
Page 141: ...Circuit Diagram Main Key Pad ...
Page 142: ...Main Board Circuit ...
Page 149: ...Keypad Circuit ...
Page 151: ...3 VX9100 Part List Main Key Pad FPCB ...
Page 161: ...4 VX9100 Component Layout ...
Page 164: ...5 VX9100 BGA Pin Map ...
Page 165: ...BOTTOM VIEW Unit mm USED NOT USED 1 MSM6550A U202 A1 Index Mark ...
Page 167: ...3 MAX9775EBX T U301 TOP VIEW USED NOT USED ...