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PAMS Technical Documentation
Appendix 2 – Transceiver THF–10T
Chapter 2
TRANSCEIVER
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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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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
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Transceiver
Exploded View of THF–10T
Technical Documentation
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THF–10T
Technical Documentation
Transceiver
Assembly Parts of THF–10T
ITEM Q’TY CODE DESCRIPTION VALUE, TYPE
1 9457939 Window DMC00802
2 9457960 A–cover DMC00789
3 9790266 Power keymat DMC01040
4 9790267 Keymat DMC00788
5 5140037 Microphone
6 5140018 Buzzer
7 5140580 Speaker
8 0200964 UIF Module GN4
9 9540021 Shield DMD02660
M1 0201049 System/RF Module TA1T
11 9510373 Antenna Clip DMD02860
12 4350111 Power Amplifier
13 2 6190001 Screw M2x3.8
14 9790163 Volume keypad DMD000097
15 9457907 B–Cover DMC01027
16 0660149 Antenna – retractable
17 6 6190031 Screw M2x8
18 9380115 Type label 4D 21663 C
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THF–10T
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Transceiver
Technical Documentation
Parts list of TA1T SMD VARIATION MODULE
(EDMS Issue 1.6) Code: 0201110
ITEM CODE DESCRIPTION VALUE TYPE
R420 1430786 Chip resistor 18 k 5 % 0.063 W 0402
G420 4350047 Vco 479–483mhz 4.5v/12ma tx nmt
G520 4350049 Vco 444–448mhz 4.5v/10ma rx nmt
Z320 4511005 Saw filter 491.25+–2.25 M 5.2x5.2
Z640 4512027 Dupl 479–483.5/489–493.5mhz 41x25 41x25
N620 4350111 IC, pow.amp. 6 V 3 W
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