LG L1150 Service Manual page 89

4. TROUBLE SHOOTING
2) RX Local signal
GSM850
GSM1800
GSM1900
• IF Frequency
GSM_Rx_Frequency-GSM_RF1_Frequency/2 = 0.1
DCS/PCS_Rx_Frequency-DCS/PCS_RF1_Frequency = 0.1
• Near 0 IF (100kHz) system
3) Rx I/Q signal
RX I/Q signals (RXQN, RXIP, RXIN, RXQP) are fed into the ABB
RXQP
IF Frequency [MHz]
869~894
1805~1880
1930~1990
RXQN RXIP RXIN
- 88 -
RF1 Frequency [MHz]
1737.8~1787.8
1804.9~1879.9
1929.9~1989.9
Rx Frequency [MHz]
0.1
0.1
0.1