Nokia 550 TRANSCEIVER 10c

PAMS Technical Documentation
Appendix 3 – Transceiver THF–10C
Chapter 2
TRANSCEIVER
Original 11/97
THF–10C
PAMS
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–10C 2 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly Parts of THF–10C 2 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List of TA1C SMD Variation Module 2 – 9. . . . . . . . . . . . . . . .
Technical Documentation
Page 2 – 2
Original 11/97
PAMS
THF–10C
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–10C 0501225
system module TA1C 0201044
software module 0240509
display module GN4 0200964
mechanics MTHF10 0261290
Swap transceiver 0501583

RF Characteristics

Characteristic Value / Comments
RX Frequency range 461.310...465.730 MHz TX Frequency range 451.310...455.730 MHz Channel spacing 20 kHz Number of channels 222 (222...1) 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
Page 2 – 3
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