Nokia 550 TRANSCEIVER 10t

PAMS Technical Documentation

Appendix 2 – Transceiver THF–10T

Chapter 2

TRANSCEIVER

Original 11/97

THF–10T

PAMS

Transceiver

CONTENTS

Introduction 2 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Functional Description 2 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Block Diagram 2 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Modules 2 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Electrical Specifications 2 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Transceiver General Specifications 2 – 4. . . . . . . . . . . . . . . . . . .

Transmitter Branch 2 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Receiver Branch 2 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

RX Synthesizer 2 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

TX Synthesizer 2 – 6. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Exploded View of THF–10T 2 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . .

Assembly Parts of THF–10T 2 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . .

Parts List of TA1T SMD Variation Module 2 – 9. . . . . . . . . . . . . . . .

Technical Documentation

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Original 11/97

PAMS

THF–10T

Technical Documentation

Introduction

Functional Description

The transceiver electronics consist of UI module PCB and RF/system PCB.
UI module is connected to system module with a connector. System and rf
submodules are interconnected with PCB wiring. Unit can be connected to
accessories with a bottom system connector, which includes charging and
accessory control.

RF block is designed for a hand portable phone, which operates in NMT450
systems. Purpose of the RF module is to receive and demodulate radio fre­quency signal from the base station and to transmit a modulated RF signal
to the base station.

Modules

Transceiver THF–10T 0501232

• system module TA1T 0201049

• software module 0240509

• display module GN4 0200964

• mechanics MTHF10T 0261452

Transceiver

Swap transceiver 0501546

RF Characteristics

Characteristic Value / Comments

RX Frequency range 489.000...493.480 MHz
TX Frequency range 479.000...483.480 MHz
Channel spacing 20 kHz
Number of channels 225 (1...225)
TX Frequency deviation ≤± 3.75 kHz (± 4.05 kHz with 4 kHz supervisory signal)
FFSK deviation

• 1200 Hz (”1” frequency) ± 2240 Hz

• 1800 Hz (”0” frequency) ± 3360 Hz

Original 11/97

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