User Guide

PAMS Technical Documentation 3. System Module
NSD-5
Issue 1 05/02 Nokia Corporation Page 9
System Module
Circuit Description
The transceiver electronics consist of the Radio Module, RF + System blocks, the UI PCB,
the display module, and audio components. The keypad and the display module are con-
nected to the Radio Module with connectors. System blocks and RF blocks are intercon-
nected with PCB wiring. The Transceiver is connected to accessories via a bottom system
connector with charging and accessory control.
The RF block is designed for a handportable phone which operates in the CDMA 1900
system. The purpose of the RF block is to receive and de-modulate the radio frequency
signal from the base station and to transmit a modulated RF signal to the base station.
Connectors
System Connector
Figure 1: Bottom Connector
Note: Intelligent Battery Interface, IBI, is an accessory interface on the battery side of
the phone including the same signals as the bottom connector. The accessory (e.g., an IBI
accessory) can be a battery pack with special features or an accessory module attached
between the phone and a normal battery pack.