User Guide

Issue 1 03/2005 COMPANY CONFIDENTIAL 5
Copyright © 2005 Nokia. All Rights Reserved.
RM-31
7 - System Module Nokia Customer Care
Receiver ......................................................................................................... 49
Transmitter ..................................................................................................... 49
Frequency synthesizer ................................................................................... 49
Signal paths ..................................................................................................... 50
Receiver signal paths ..................................................................................... 50
Transmitter signal paths ................................................................................. 52
Frequency synthesizer signals ....................................................................... 53
Printed Wiring Board ........................................................................................ 54
RF key component placement ......................................................................... 55
Differentiation between 900 MHz and 850 MHz (US) version (RM-30 vs. RM-31)
58
Antenna radiator (I039) and deco foil (I041) .................................................... 58
RF components................................................................................................ 59
MCU-SW ............................................................................................................. 61
Tuning .............................................................................................................. 61
Flash exchange ................................................................................................. 62
Tuning and testing ......................................................................................... 63
Power Amplifier / Antenna Switch Exchange / SAW Filter............................ 65