Park Air Systems BT6M User Guide

PARK AIR ELECTRONICS LTD
NORTHFIELDS
MARKET DEEPING
PETERBOROUGH
PE6 8UE
TEL:[phone]
FAX:[phone]

T6M Service Manual

Issue 1

Copyright Information

© 2000 Park Air Electronics
All rights reserved. No part of this publication may be reproduced,

transmitted, transcribed, or stored in a retrieval system, or translated into
any language without the written permission of Park Air Electronics. No
part of any copyrighted computer programs contained in the products
referred to in this manual may be copied or reproduced without the express
written consent of Park Air Electronics.

Park Air Electronics reserves the right to change the products described in

this manual without prior notice.

is a trademark of Park Air Electronics.

is a trademark of Intek Global Corporation

IBM and PC are trademarks of IBM Inc.
I2C is a trademark of Philips

Federal Communications Commission (FCC) Regulations

♦ This device complies with Part 15 of the FCC Rules. Operation is

subject to the condition that this device does not cause harmful
interference.

♦ You are required to obtain a station license before transmitting from

your mobile equipment.

♦ This equipment is only licensed for operation on 25 kHz channel

spacing. Operation on 8.33 kHz channel spacing is restricted to

European customers.

♦ The mobile transmitter power output must not exceed the output

necessary for satisfactory technical operation taking account of local
conditions and the area to be covered.

♦ The mobile transmitter frequency and parameters should be checked by

authorised service personnel before use, and at least yearly thereafter.

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page i

Safety Information

♦ DO NOT operate this equipment with the antenna close to or touching

eyes, face, or exposed body parts.

♦ KEEP any mobile equipment containing a transmitter out of reach of

children.

♦ AVOID holding the transmit (PTT) switch in the ‘ON’ position when not

communicating.

♦ DO NOT operate equipment at filling stations.

♦ DO NOT operate equipment in vicinity of

explosives or explosive atmospheres (e.g. in a
blasting quarry).

♦ The Power Amplifier Module used in these mobile

radios contains beryllium oxide, which is extremely
toxic. In the unlikely event of coming into contact
with beryllium oxide, wash the affected area
thoroughly with soap and water. If the skin is
broken obtain medical assistance. If there is eye
contact, wash for 15 minutes with running water,
including under the eyelids and seek medical
attention. If ingested or inhaled, seek medical
attention immediately.

Repairs, Modifications and Maintenance

♦ If any operational difficulties arise while using this product, report them

to authorized service personnel as soon as possible.

♦ This system contains no user serviceable parts. Unauthorized

adjustments or modifications will void the warranty and may lead to
emissions outside FCC limits.

♦ DO NOT connect an external RF power amplifier to this equipment.

Patent Information

♦ The Linear Modulation techniques described in this publication are

subject to Patents issued to the British Technology Group (BTG) and
Linear Modulation Technology (LMT)

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page ii

♦ Patent No’s are: BTG – UK 2161661, 2163326; US 4691375, 4679243:

LMT - UK 2243058, 2274231, 2272589, 2293935: EU 0447237,
0725495, 0598585, 0648012, 0706259: US 5249202, 5381108,
5507017, 5623226.

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page iii

Table Of Contents

Section

1 INTRODUCTION
2 SPECIFICATION
3 EQUIPMENT DESCRIPTION
4 INSTALLATION
5 OPERATION
6 PERFORMANCE TESTING
7 DETAILED CIRCUIT DESCRIPTION
8 CIRCUIT DIAGRAMS
9 BOARD LAYOUTS
10 GENERAL ASSEMBLIES
11 PARTS LIST
12 ACCESSORIES AND LEADS
13 LOOMS

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page iv

Amendment Schedule

Amendments to this manual will be issued to incorporate changes or detail additional
information. Amended pages will be identified by the amendment date and number, which will
be shown at the foot of the page. Record incorporation of amendments to this manual on this
page.

If a new issue of this manual is made all amendments will be incorporated.

Date Amdt. No. Date Incorporated Reason for Change

If you find any errors or omissions in this manual, or you have any suggestions for
improvements please write to the address shown on the front page.

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page v

INTRODUCTION

1 INTRODUCTION

The Park Air Electronics (PAE) mobile transceiver Type T6M is a multi­channel VHF AM equipment operating in the frequency range 118 to 137 MHz
with a bandwidth of 8.33 or 25 kHz. The transceiver is designed for vehicle
mounting via a bracket, usually around the dash board area. The equipment,
which operates from a +13.2 volt, is supplied with mounting bracket and plug
in microphone.

The transceiver provides a nominal 8 watt output.
The required frequencies, priority frequencies and scan facilities are normally

programmed, to the user’s requirements, during manufacture or by the
equipment supplier. If a user wishes to programme the equipment, then disk
based programming software and a programming lead can be supplied by
PAE.

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 1-1

2. T6M Series Specifications

The following specifications are intended for testing and servicing the mobile
radio. Specifications are subject to change without notice.

2.1 General

Air Interface None
Operating Mode Single Frequency Simplex
Frequency Range

Receive 118 - 137 MHz

Transmit 118 - 137 MHz
Channel Bandwidth 25 kHz and 8.33 kHz.
Channel Increment 8.33 kHz
Input Voltage 13.2 VDC nominal (10.8 V to 18 V),

negative ground
Max Receive Current 2A
Max Off Current 100mA

SPECIFICATIONS

Audio Output 4W into 4ohm external speaker
Temperature Range

Dimensions

Weight 1.75 kg (±0.1kg)
Approvals CE, SERPS, MOPS

2.2 Receiver

Sensitivity -100dBm
Selectivity 50dB @ 8.33kHz, 60dB @ 25kHz
Intermodulation 60dB
Spurious and Image Rejection 75dB
Audio Power Output 4 Watts.
Distortion <10% THD
RF Input Impedance 50 ohms

(<10%THD)

Normal +15°C to +35°C
Operating -20°C to +55°C
Storage -40°C to +85°C

Width 177 mm (6.95”)
Depth 228 mm (8.98”)
Height 50 mm (1.95”)

EN300 279 Ed 2

EN 300 676

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 2-1

SPECIFICATIONS

2.3 Transmitter

RF Output Power, Nominal 8 Watts
Spurious -46dBm
Harmonics -36dBm
Audio Modulation AM
RF Load Impedance 50 ohms
Frequency Stability ± 1.0ppm (normal)

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 2-2

EQUIPMENT DESCRIPTION

3. Section Index

3. Section Index 3-1

3.1 General 3-2

3.2 T6M Series Mobile Front panel 3-2

3.3 Mobile Radio Programming 3-2

3.3.1 Programming Interface Lead 3-2

3.3.2 Programming Software 3-2

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 3-1

EQUIPMENT DESCRIPTION

TX

BUSY

SQL

SEL

PRI

POWER

3.1 General

The T6M series mobile radio is designed to operate in single frequency
simplex mode on the International Air Band allocation (118-137 MHz mobile
transmit and receive).

The mobile radio is field programmable, allowing it to be customized both for
the frequency allocation for which it is intended, and for the particular user.
Refer to the built in help facilities of the Mobile Programming Software for
more information.

The mobile radio is designed to be mounted in the driver’s compartment of a
road vehicle. It can withstand the vibration, shock and extremes of
temperature typically encountered in this environment. The mobile radio’s
basic construction consists of a die-cast alloy chassis, and an injection
molded ABS front panel.

3.2 T6M Series Mobile Front panel

VOL

SCN

CH

3.3 Mobile Radio Programming

As well as the standard accessories supplied with the mobile radio (listed in
the installation section of this manual), the following additional accessories
can be used:

3.3.1 Programming Interface Lead

For programming purposes the microphone connector on the mobile radio is
connected directly to the serial port of a PC using a special programming
interface lead.

3.3.2 Programming Software

The personality of the mobile radio must be programmed before it can be
put into service in a system. This is normally done at the time of
manufacture or by the equipment supplier. Special programming software is

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 3-2

EQUIPMENT DESCRIPTION

available for this purpose, which runs on a PC. The software is available on

3.5” floppy disks. The software contains built in help features.

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EQUIPMENT DESCRIPTION

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