User Guide

CCS Technical Documentation System Module and User Interface
Company confidential RH-20
Issue 1 10/2003 Nokia Corporation. Page 3
IHF Speaker & Stereo Audio Amplifier .................................................................33
Internal Microphone ................................................................................................33
Internal Speaker .......................................................................................................33
IHF Speaker & Stereo Audio Amplifier .................................................................34
Memory Block ...........................................................................................................35
Security ....................................................................................................................35
Clock distribution ......................................................................................................35
Audio Control ..........................................................................................................36
Accessory identification and Power Supply ............................................................36
Backup Battery ........................................................................................................37
RF Module Introduction ...............................................................................................38
RF Frequency Plan ....................................................................................................39
DC characteristics ......................................................................................................40
Regulators ................................................................................................................40
Typical current consumption ...................................................................................41
Power Distribution ..................................................................................................42
RF characteristics .........................................................................................................43
Channel Numbers and Frequencies .........................................................................43
Main RF characteristics ...........................................................................................43
Transmitter characteristics ......................................................................................44
Receiver characteristics ...........................................................................................44
RF Block Diagram ..................................................................................................44
RF Block Diagram RH-20 .......................................................................................45
Frequency Synthesizers .............................................................................................46
Receiver .....................................................................................................................46
Transmitter .................................................................................................................46
Other ........................................................................................................................46
Power Amplifier ......................................................................................................47
RF ASIC Helgo .......................................................................................................48
AFC function ...........................................................................................................48
Antenna ..................................................................................................................48
User interface modules ..............................................................................................49
UI board 1dm ..........................................................................................................49
Keyboard .................................................................................................................49
LCD .........................................................................................................................51
LCD & keypad illumination ....................................................................................52
Internal earpiece ......................................................................................................52
IHF ..........................................................................................................................52
Internal microphone ................................................................................................53
IR module ................................................................................................................53
Vibra ........................................................................................................................53
Pop-Port system connector ......................................................................................54