LG VX11000 Service Manual page 31

VX11000
1.2.2 Diplexer (F1000)
The main function of Diplexer is to prohibit the other band signals from flowing into the one band circuit and vice
versa. RF designer can use Dual-band Diversity antenna regardless of frequency band (800 and 1900 MHz).
The specification of VX11000 Diplexer is described below:
Temperature Range
1.2.3 Diversity Rx RF SAW FILTERs (F1001,F1002)
The main function of Diversity Rx RF SAW filter is to attenuate mobile phone spurious frequency, attenuate
direct RF frequency pick up.
1.2.4 RTR6500 – LNA part (U1009)
The RTR6500 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 VX11000 LNA is described below:
Parameter
Gain
Noise Figure
Input IP3
1.2.5 GPS LNA(U1001)
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 VX11000 GPS LNA is described below
LG Electronics Inc.
Frequency Range
Insertion Loss to
Common
Isolation
Low gain
Cellular PCS
-20 -20
20 20
+10 +10
Parameter
Gain
Noise Figure
1dB compression point
IIP3
Cellular
824 – 894 MHz
0.5 dB Max
(At +25 deg)
18 dB Min
(to PCS)
-30 to +85 deg
Middle gain
Cellular PCS
4 -3
4 4
+5 +10
GPS Band
13.1
0.77
+3.4
+7
PCS
1850 – 1990 MHz
0.6 dB Max
(At +25 deg)
18 dB Min
(to Cellular)
High gain
Cellular PCS
16 16
1.6 1.7
+8 +6
Units
dB
dB
dBm
dBm
Units
dB
dB
dBm
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