Nokia 2140 Transceiver 07
TRANSCEIVER
NHK–1
12/97 OJ
Technical Documentation
Contents of Transceiver
Transceiver NHK–1 7–2
Introduction 7–2
Functional Description 7–2
Block Diagram 7–3
Interconnection Diagram 7–4
Assembly 7–5
Basic Construction 7–5
Electronics Module 7–5
UIF Module 7–5
A –cover 7–5
B –cover 7–5
Window 7–5
Antenna 7–6
Battery Pack 7–6
Exploded View of NHK–1XN 7–8
Assembly Parts of NHK–1XNCode: 0260297 7–9
Exploded View of NHK–1XA 7–10
Assembly Parts of NHK–1XACode: 0260295 7–11
Exploded View of NHK–1XB 7–12
Assembly Parts of NHK–1XB Code: 0260296 7–13
7–1
Copyright Nokia Mobile Phones
TRANSCEIVER
NHK–1
Transceiver NHK–1
Related Documentation
Introduction
The NHK–1 is a radio transceiver unit for the PCN network. It is PCN power
class 1 transceiver providing 11 power levels at a maximum power of 1 W.
The transceiver consists of three modules: system module, user interface module and mechanics.
12/97 OJ
Technical Documentation
6E 0260297 Mechanics of NHK–1XN
6E 0260295 Mechanics of NHK–1XA
6E 0260296 Mechanics of NHK–1XB
6E 0260324 Mechanics of NHK–1EA
7–2
Copyright Nokia Mobile Phones
The plug–in SIM (Subscriber Identity Module) card reader is located inside the
phone.
Functional Description
The transceiver electronics consist of the Radio Module (System + RF blocks)
and the UI Module. The UI Module is connected to the Radio Module with a
connector. System blocks and RF blocks are interconnected with PCB wiring.
The transceiver is connected to accessories via a bottom system connector
with charging and accessory control.
The System blocks provide the MCU and DSP environments, Logic control IC
(EDSA), memories, audio processing and RF control hardware (RFI). On board
power supply circuitry delivers operating voltages for both System and RF
blocks.
The general purpose microcontroller, Hitachi H8, communicates with DSP, memories and logic control IC (EDSA) with 8 bit data bus.
The RF block is designed for a handportable phone which operates in the PCN
system. The purpose of the RF block is to receive and demodulate the radio
frequency signal from the base station and to transmit a modulated RF signal to
the base station.
Block Diagram
DUPLEX
FILTER
RX
RX
SYNTE
SYNTE
TX
TX
IF 13 M
Clk 26 M
AFC
TXI, TXQ
TXC
UIF
SYSTEM
RFI
Clk 13 M
ASIC
Clk 26 M
EDSA
SIM
MCU
DSP
DBUS
M2BUS
AUDIO
TRANSCEIVER
12/97 OJ
Technical Documentation
Copyright Nokia Mobile Phones
RF BLOCK
RF CONTROL
SYSTEM BLOCK
Clk 512 k, Clk 8 k
NHK–1
7–3
TRANSCEIVER
NHK–1
12/97 OJ
Technical Documentation
Interconnection Diagram
SIM Display
524
2
MIC
UI – MODULE
7–4
Copyright Nokia Mobile Phones
2
EARPIECE
2
BUZZER
RADIO – MODULE
16 2+2 2
SYSTEM
CONNECTOR
30
4
BATTERY
CHARGER ANTENNA
Loading...