Nokia RH-3 Series Troubleshooting - Rf page 38

RH-3
Troubleshooting - RF
Path of the Received Signal
Functional block diagram of the GPS RF:
1575.42 MHz
LNA
BPF SAW
16.368 MHz
TCXO
Page 38
4.092MHz
Image Reject
Mixer
LO=1571.328 MHz
÷ 2
Loop VCO
Filter Tank
÷ 2
÷ 8
÷12
fcomp=16.368MHz
Ph ase
Det
Oscillator
Figure 1: GPS RF Functional Diagram
Nokia Corporation
CCS Technical Documentation
AGC
4 Bit
ADC
IF out Tes t
Points
LO/8 Test Point
196.416 MHz
DATA
Programming
CLOCK
Interface
ENABLE
Confidential
ADCout
4
IFout
GPS Clock
LO/8 Test
SPI
Issue 1 06/2003