Transmitter(Tx); Gps - Nokia RH-109 Service Manual

RH-109
System Module Description

Transmitter(TX)

The digital baseband signal (eg. from the microphone) is converted to an analogue signal, which is then
amplified and transmitted from the antenna. The frequency of this signal can be tuned to match the bandwidth
of the system in use (eg. CDMA CELL band).
The transmitter functions are implemented in the QSC6055 RF block. Even though the CELL/PCS/AWS signals are
sent via different components, the principles of the transmission is the same.
QSC6055

GPS

The QSC6055 performs gpsOne technology, and simultaneous- GPS architecture and Assisted- GPS and
Standalone-GPS operating mode.
Issue 1
Coupler
800 TX
PAM
SAW
Coupler
PCS TX
SAW
PAM Coupler
AWS TX
SAW
QSC6055
COMPANY CONFIDENTIAL
Copyright © 2008 Nokia. All rights reserved.
800
Duplexer
800
Duplexer
PCS PCS
Duplexer
AWS
AWS
GPS Antenna
GPS_IN
GPS
SAW
CDMA antenna
SP3T
Page 5-13