Troubleshooting - Global Positioning System (Gps) Engine; Gps General Block Diagram; Gps Rf Schematic - Nokia RH-27 Series Troubleshooting Manual

CCS Technical Documentation

Troubleshooting - Global Positioning System (GPS) Engine

The RH-27 handset supports 800 Amps and 800 CDMA / 1900 CDMA + GPS with IS 2000
capability. The RH-27 engine supports CDMA and GPS functionality for Enhanced 911
(E911) services.
GPS circuitry utilizes RF signals from satellites stationed in geosynchronous orbit to
determine latitude and longitude of the handset. The GPS circuitry and the cellular
engine (CE) circuitry are completely separate in the handset. The GPS circuitry is located
almost exclusively on the secondary side of the PWB, underneath the display module.

GPS General Block Diagram

Filter Filter
LNA
Xtal
16.368MHz

GPS RF Schematic

Filter 1 (Z001)
RF Input
Circuits located on Bottom Layer
Issue 1 11/2003 Confidential
IF = 4.092MHz
AGC
Amp
Synthesiser
GPS RF
Filter 2 (Z002)
Circuits located on Top Layer
©2003 Nokia Corporation
Troubleshooting - GPS
4
ADC
TRF5101
Cellular Baseband
GPS RF Chip (N001)
RH-27
Rx Data
Out
GPS
Baseband
Ref Clk
Page 3