Sony Ericsson C903 Troubleshooting Manual page 100

FUNCTIONAL OVERVIEW Technical Description SEMC Troubleshooting Manual
C903
RF System Control
The access side of the digital baseband controller controls the overall radio system.
In both EDGE/GSM/GPRS and WCDMA air interface mode, the digital baseband controller
Ericsson RF 3300 Block Diagram:
controls the radio system through a three-wire serial bus. The digital baseband controller
also manages PA band control and the antenna switch mechanism in the front end module.
The 26 MHz VCXO clock residing in the transceiver is turned on only when required and
initiated by the digital baseband controller.
The control flow for the RF system:
EDGE/GPRS/GSM
TX Frequency, Channel and Power Level Range:
GSM 850:
TX Frequency Range: 824,2 MHZ – 848,8 MHZ
Channel Range TX: 128 – 251
Power Level: Min 19 – Max 5
GSM 900:
TX Frequency Range: 890,2 MHZ – 914,8 MHZ
Channel Range TX: 1 - 124
Power Level: Min 19 – Max 5
EGSM 900:
TX Frequency Range: 880,2 MHZ – 889,8 MHZ
Channel Range TX: 975 - 1023
Power Level: Min 19 – Max 5
DCS 1800:
TX Frequency Range: 1710,2 MHZ – 1784,8 MHZ
Channel Range TX: 512 – 885
Power Level: Min 15 – Max 0
PCS 1900:
TX Frequency Range: 1850,2 MHZ – 1909,8 MHZ
Channel Range TX: 512 - 810
Power Level: Min 15 – Max 0
RX Frequency and Channel Range:
GSM 850:
RX Frequency Range: 869,2 MHZ – 893,8 MHZ
Channel Range RX: 128 – 251
GSM 900:
Frequency Range: 935,2 MHZ – 959,8 MHZ
Channel Range RX: 1 - 124
1228-1147 rev. 1 100 (129)