Programmes After Market Services (PAMS)
Technical Documentation
NME±2A Series Transceivers
Chapter 5
Handset HSE - 6XA
Issue2 02/00
NME±2A |
P.A.M.S. |
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Handset HSE - 6XA |
Technical Documentation |
AMENDMENT RECORD SHEET
Amendment |
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08/97 |
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Original |
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Technical Documentation |
Handset HSE - 6XA |
CHAPTER 5 ± HANDSET HSE - 6XA
CONTENTS
Page No
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 5
Technical Summary . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 5
Modes of Operation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 5 External Signals and Connections . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 5 Display Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 6 Functional Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 7 Functional Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 7
Circuit Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 9 General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 9 Construction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 9 Handset Module . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 9 Microphone Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 9 Earphone Amplifier . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 10 CPU with Peripherals . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 10
HOOK Indicator . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 10 M2BUS Electronics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 10 LCD Display . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 10 Display Controller/Driver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 10 Keyboard Matrix . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 11 Illumination . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 11 Voltage Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 11 Power on/off Logic . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 11
Oscillators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 12 Assembly Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 14 Parts List of EH9 v. 3.4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 15 Parts List of EH9 v. 4.1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 20
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Handset HSE - 6XA |
Technical Documentation |
List of Figures
Page No
Figure 1. Handset connector . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 6
Figure 2. Block Diagram ± HSE±6XA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 13 Figure 3. Exploded View HSE±6XA . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5 ± 14
Schematic Diagrams:
Circuit Diagram EH9 Module (Version: 0.8 Edit 48) . . . . . . . . . . . . . . . . 5/A3 ± 1 Component Layout Diagrams EH9 Module Side 1 . . . . . . . . . . . . . . . . . 5/A3 ± 2 Component Layout Diagrams EH9 Module Side 2 . . . . . . . . . . . . . . . . . 5/A3 ± 3
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NME±2A |
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Technical Documentation |
Handset HSE - 6XA |
Introduction
The HSE±6XA Handset has two main functions: to form an electro±acoustic interface between the user and the transceiver unit and to provide means for controlling the transceiver unit and other accessories.
The HSE±6XA is divided into two parts: the EH9 electronics module and the MHSE6XA mechanics. The EH9 module consists of an 8±bit microprocessor with internal memory, a 2x8 character display (+ 2 seven±segment) with one driver IC, keyboard, earphone, microphone, loudspeaker and corresponding amplifiers.
The mechanics consist of the A±cover (front), B±cover (rear), keyboard rubber mat, coiled cord, display frame and a number of smaller parts.
The HSE±6XA is designed for single±handset systems and for mobile use only, so it has no audio switches, and is not provided with functions for a power±safe or sleep mode.
Technical Summary
Modes of Operation
The HSE±6XA has only one mode of operation, used when the handset is operating as a combined handset and control unit. There is no need for a local mode because all testing can be done by means of
M2BUS±messages.
External Signals and Connections
The HSE±6XA has an 8±pin connector for connection to the junction box, system cable and transceiver via coiled cord.
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Handset HSE - 6XA |
Technical Documentation |
HANDSET |
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HJ |
VBS |
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DGND |
RXD 47R 47R |
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M2BUS |
N/C
PWR
AGND
10uF MIC
1k 47nF |
EAR |
100k
Figure 1. Handset connector
Signal names and basic interface connections:
Pin |
Name |
Level |
Comments |
1 |
VBS |
typ. 13.2 V |
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min. 10.0 V |
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max. 17.0 V |
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2 |
DGND |
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Digital ground |
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3 |
MBUS |
Input: º0º< 0.9 V |
Input levels at processor |
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º1º> 1.9 V |
input/RxD |
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Output: º0º< 0.5 V |
Max allowed capacitance 2 |
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nF |
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4 |
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No connection |
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5 |
POWER |
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Series diode dropout 0.7 V |
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6 |
AGND |
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Analog ground |
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7 |
MIC |
max. 2 Vrms |
No DC connection |
8 |
EAR |
max. 1.2 Vrms |
DC 0.0 V |
Display Specifications
The HSE±6XA comprises a 16 character (5x2) dot matrix and two and a half seven segment indexes.
The HSE±6XA comprises a 2x8 (5x7) dot matrix display for 2 seven±segment characters, a signal strength indicator (left bar) and a number of fixed indicators over and under the character lines.
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NME±2A |
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Technical Documentation |
Handset HSE - 6XA |
The yellow±green supertwist liquid crystal display is connected to the pcb by means of elastomer connectors. The display is illuminated with green
LEDs from both sides.
Technical specifications for the display include:
Display type |
Yellow±green supertwist lcd, transflective |
Illumination colour |
Yellow±green LED |
Driving mode |
MUX 1:16, 1/5±bias |
Driving voltage |
7.5 V at +25°C |
Temp. compensation |
30 mV/°C |
Lens thickness |
1.1 mm |
Display driver |
NEC μPD7228AG |
Storage temperature |
±30...+85°C |
Oper. temperature |
±25...+70°C |
Humidity |
typ. 50% RH max. 90% RH |
Response times |
t(rise) < 100 ms (+25°C) < 1500 ms (±25°C) |
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t(fall) < 100 ms (+25°C) < 1500 ms (±25°C) |
Functional Description
Functional Blocks
HSE±6XA Handset consists of the following functional blocks:
±Audio circuit
±Microprocessor
±Keyboard matrix
±Keyboard illumination
±Display controller/driver
±Voltage converter
±LCD display
±Display illumination
The Audio circuit consists of the earphone and the microphone and corresponding amplifiers.
The Microprocessor is a single chip version with internal ROM and RAM. The microprocessor controls all other blocks.
The Keyboard matrix is connected directly to microprocessor inputs and outputs.
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NME±2A |
P.A.M.S. |
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Handset HSE - 6XA |
Technical Documentation |
Keyboard illumination is accomplished with LEDs and is switched on, off or dimmed by the microprocessor.
The Display controller/driver is connected to the microprocessor over a parallel data line, and contains a display data RAM and character generator ROM/RAM.
The Voltage converter converts the voltages of +5 V to ±5 V and divides the voltage between +5 V and ±5 V to five levels (V1...V5), which are connected to the display controller/driver.
The LCD display is connected to pcb and display drivers over two elastomer connectors.
The Display illumination is of the same type as the keyboard illumination.
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