Nokia 550 TRANSCEIVER 10h
PAMS Technical Documentation
Appendix 8 – Transceiver THF–10H
Chapter 2
TRANSCEIVER
Original 11/97
THF–10H
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–10H 2 – 7. . . . . . . . . . . . . . . . . . . . . . . . . . . .
Assembly Parts of THF–10H 2 – 8. . . . . . . . . . . . . . . . . . . . . . . . . . .
Parts List of TA1H SMD Variation Module 2 – 9. . . . . . . . . . . . . . . .
Technical Documentation
Page 2 – 2
Original 11/97
PAMS
THF–10H
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–10H 0501226
• system module TA1H 0201042
• software module 0240509
• display module GN4 0200964
• mechanics MTHF10 0261290
Transceiver
Swap transceiver 0501584
RF Characteristics
Characteristic Value / Comments
RX Frequency range 465.230...467.370 / 468.570...469.990 MHz
TX Frequency range 455.230...457.370 / 458.570...459.990 MHz
Channel spacing 20 kHz
Number of channels 239 (239...132 / 72...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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