After Sales Technical Documentation
THF–9 Series Transceivers
Chapter 1
Baseband Block
Original 49/96
THF–9
After Sales
Baseband Block
Technical Documentation
CONTENTS
Transceiver THF–9 3 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Related Documentation 3 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Introduction 3 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Functional Description 3 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block Diagram 3 – 3. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Baseband 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
PWRU 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
CTRLU 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
AUDIO 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RF 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
RX 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SYNT 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
TX 3 – 4. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Interconnection Diagram 3 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Power Distribution Diagram 3 – 5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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Original 49/96
After Sales
THF–9
Technical Documentation
Transceiver THF–9
Related Documentation
Introduction
Functional Description
The transceiver electronics consist of the UI module PCB and the RF/system
PCB. The UI module is connected to system module with a connector . The
system and RF submodules are interconnected with PCB wiring. The unit
can be connected to accessories with a bottom system connector , which includes charging and accessory control.
The 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.
Baseband Block
6E 0261302 Mechanics of THF–9
Block Diagram
THF–9 consists of 2 pcbs, GP3 and GU3F. GP3 consists of 2 submodules,
BASEBAND and RF. The BASEBAND module consists of 3 functional
blocks: PWRU, CTRLU and AUDIO, and the RF module consists of 3 functional blocks: RX, SYNT , and TX. The PCB GU3F is the User Interface module (UIF–module).
PWRU
CTRLU
BASEBAND–submodule
AUDIO
RX
SYNT
TX
RF–submodule
ANT
DUP
LCDLCD
Original 49/96
UIF–module
LCD Driver
MIC/EAR
BUZZER
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THF–9
After Sales
Baseband Block
Baseband
PWRU
The power block makes the supply voltages for the phone and includes
also the charging electronics.
CTRLU
Main Features of the CTRLU block
– system control
– communication control
– authentication
– power up/down control
– accessory monitoring
– battery monitoring
Technical Documentation
AUDIO
RF
RX
SYNT
– production testing
– RF–controls
– UIF–interface
– M2BUS interface
The block includes microphone and earpiece amplifier and all necessary
audio functions.
The RX module receives and demodulates the radio frequency signal from
the base station.
The transmitter synthesizer generates a frequency modulated RF signal for
the transmitter section. The transmission frequency is generated by a
phase–locked loop (PLL). The synthesizer circuit contains VCO, synthesizer
logic and loop filter.
TX
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The receiver synthesizer operates in the same way as the corresponding circuit in the TX synthesizer . The first injection frequency is supplied to the receiver module.
The Transmitter module generates and amplifies the RF signal to be transmitted to the base station.
Original 49/96
After Sales
THF–9
Technical Documentation
Interconnection Diagram
BATTERY
PACK
SYSTEM / RF MODULE
UIF MODULE
LCD KEYBOARD
Baseband Block
TO / FROM ACCESSORIES
CHARGER
EXT. ANTENNA
MICROPHONE
EARPHONE
BUZZER
Power Distribution Diagram
VBAT
VCS
PWRU
VA,VL,VL2=3.3 V
VL3=4.75 V
VL4=4.1 V
VBAT,VRF=5.3....8.8 V
VREF
VL
VL2
VL3
VA
VL4
RECEIVER
CTRLU
VCCR
AUDIO
TRANSMITTERSYNTHESIZER
VRF
LCD Driver
UIF–module
VBAT
LCDLCD
Original 49/96
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THF–9
After Sales
Baseband Block
Technical Documentation
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Original 49/96
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