Samsung SCH-i830 Service Manual page 13

Circuit Description
2-5. GPS Section
Antenna
Antenna receives signal from GPS satellites.
It is a tri-band Antenna and covers GSM band, PCS band, CDMA band and GPS band.
RF Switch(U1201)
It(U1201:NJG1519KC1) is used to switch the GSM Path, PCS path, CDMA path and the GPS
path. The RF signal pass through PCS path when PCS_SW is high The RF signal
pass through CDMA path when CDMA_SW is high. The RF signal pass through
GPS path when GPS_SW is high. The RF signal pass through GSM path when GSM_SW is high.
GSM_SW, PCS_SW, CDMA_SW and GPS_SW are digital signals from MSM6500 GPIO.
RF Band Pass Filter(F1002)
The RF BPF(F1002) passes only a specific frequency(1575.42±2 MHz) from the signal received
from the satellites. The bandwidth is 2 MHz.
Low Noise Amplifier(TR1001)
The low noise amplifier(TR1001) amplifies a weak signal received
from the satellites to obtain the optimum signal level.
Low Noise Amplifier(U1001)
The low noise amplifier(It is included in RFR6000 : U1001) amplifies a weak signal received
from the satellites to obtain the optimum signal level.
2-9
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