Transmitter (TX)
The digital baseband signal (e.g. 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 bandwith
of the system in use (e.g. GSM900).
The transmitter functions are implemented in the RF ASIC.
Even though the GSM and WCDMA signals are sent via different components, the principle of the transmission
is the same.
RM-424; RM-564
System Module
Page 6 –24
COMPANY CONFIDENTIAL
Issue 1
Copyright © 2009 Nokia. All rights reserved.
Содержание 6720 classic
Страница 133: ...4 RF Troubleshooting Nokia Customer Care Issue 1 COMPANY CONFIDENTIAL Page 4 1 Copyright 2009 Nokia All rights reserved ...
Страница 179: ...6 System Module Nokia Customer Care Issue 1 COMPANY CONFIDENTIAL Page 6 1 Copyright 2009 Nokia All rights reserved ...
Страница 209: ...Glossary Nokia Customer Care Issue 1 COMPANY CONFIDENTIAL Page Glossary 1 Copyright 2009 Nokia All rights reserved ...