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PAMS Technical Documentation
Transceiver NSC-1 Introduction
The NSC-1 is a radio transceiver unit for TDMA 800 networks. The transceiver is a true
3 V transceiver.
The transceiver consists of the System/RF module (US4RSM), User Interface module
(UE4S), and assembly parts.
The purpose of the Baseband module is to control the phone and process audio signals to
and from RF. The module also controls the user interface.
The transceiver features a full graphic display and two soft-key based user interfaces.
The antenna is a fixed helix. External antenna connection is provided by the rear RF con-
nector.
The transceiver has a leak-tolerant earpiece and (noise cancelling) microphone.
User-changeable front covers make it easy to vary the transceiver color.
Functional Description
There are five different operation modes:
•
power off mode — only the circuits needed for power up are supplied.
•
sleep mode — circuits are powered down, and only the sleep clock
runs.
•
active mode — all the circuits are supplied with power, although some
parts might be in the idle state part of the time.
•
charge mode — consists of two different states (i.e., charge mode and
maintenance mode). The charge mode is effective in parallel with all
previous modes.
•
local mode — used for alignment and testing.
Issue 4 03/01
General Information and NAM Programming
Nokia Mobile Phones Ltd.
NSC-1
Page 13
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