Siemens SXG 75 - Page 14

Release 1.0
Technical Documentation 01/2006
TD_Repair_L3_SXG75_R1.0.pdf Page 14 of 73
5.3.4
UMTS TX
The IQ signals from the baseband are directly up-converted to the RF band by a Quadrature
Upconverter and passed to the external filter. The UMTS 1900 TX path is not used in the SXG75.
Blockdiagram RTR6250
VBATT
UMTS2100 TXWCDMA TX
PA_ON0
(level shifted)
Circuit diagram (sheet 4)
Company Confidential
2006©BenQ