Receiver (Rtr6250 And Rfr6250) - Siemens SXG 75 Service Repair Documentation

5.2

Receiver (RTR6250 and RFR6250)

The RFR6250 has two VCOs. The first is for the UMTS direct conversion receiver. The second is
for the GPS receiver and the PLL for this VCO is on the RTR6250 RFIC.
Block diagram RFR6250
The RTR6250 contains two PLLs, the first is used by the RTR for all GSM transceiver functions and
for the UMTS TX LO generation. The second PLL is used to control the GPS VCO in the sister
RFR6250 RFIC.
Block diagram RTR6250
Technical Documentation
TD_Repair_L3_SXG75_R1.0.pdf
Company Confidential
2006©BenQ
Release 1.0
01/2006
Page 10 of 73