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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 Description of RX Part Circuit
1.2.1 Quintplexer (DP100)
The Quintplexer consists of the Rx bandpass filter (BPF), the Tx BPF and the GPS filter (BPF) which has the
function of separating Tx, Rx and GPS signals in the full Triplex system for using the common antenna. The Tx part
BPF is used to suppress noises and spurious out of the Tx frequency band. The Rx BPF is used to receive only Rx
signal coming from the antenna, which is usually called preselector. It’s main function is to limit the bandwidth of
spectrum reaching the LNA and mixer, attenuate receiver spurious response and suppress local oscillator energy. As
a result frequency sensitivity and selectivity of mobile phone increase. The specification of VX9100 Quintplexer
described below;
z
PCS band
Tx
Rx
Tx to Rx (min)
Pass Band
1850.5~1909.5 MHz
1930.5~1989.5 MHz
Insertion Loss
3.9 dB max
4.2 dB max
Return Loss
9.5 dB min
9.0dB min
Attenuation
40 dB min
(1930.5~1989.5MHz)
50dB min
(1850.5~1909.5MHz)
53 dB (1850.5~1909.5MHz)
40 dB (1930.5~1909.5MHz)
z
Cellular band
Tx
Rx
Tx to Rx (min)
Pass Band
824~849 MHz
869~894 MHz
Insertion Loss
2.6 dB max
3.4 dB max
Return Loss
9.0 dB min
9.0dB min
Attenuation
40 dB min
(869~894MHz)
55dB min
(824~849MHz)
55 dB (824~894MHz)
40 dB (869~894MHz)
z
GPS band
Pass Band
1574.42~1576.42MHz
Insertion Loss
1.9 dB max
Return Loss
9 min
Isolation1
50 dB min(Cell Tx à GPS)
Isolation2
45 dB min(PCS Tx à GPS)
Содержание VX9100 Maroon
Страница 135: ...1 VX9100 Assembly Disassembly Diagram ...
Страница 136: ......
Страница 137: ......
Страница 138: ...2 VX9100 Block Circuit Diagram Main Key Pad FPCB ...
Страница 139: ...Block Diagram ...
Страница 141: ...Circuit Diagram Main Key Pad ...
Страница 142: ...Main Board Circuit ...
Страница 149: ...Keypad Circuit ...
Страница 151: ...3 VX9100 Part List Main Key Pad FPCB ...
Страница 161: ...4 VX9100 Component Layout ...
Страница 164: ...5 VX9100 BGA Pin Map ...
Страница 165: ...BOTTOM VIEW Unit mm USED NOT USED 1 MSM6550A U202 A1 Index Mark ...
Страница 166: ...2 HYC0SGH0MF3P 6S60E U300 Unit mm A1 Index Mark USED NOT USED BOTTOM VIEW All Pins assigned to Logic Signal and GND ...
Страница 167: ...3 MAX9775EBX T U301 TOP VIEW USED NOT USED ...
Страница 168: ...4 LP3922 U401 USED NOT USED BOTTOM VIEW ...
Страница 169: ...5 BD6085GUL U500 USED NOT USED BOTTOM VIEW ...