PAE T6M User manual

T6M Service Manual
Issue 1
PARK AIR ELECTRONICS LTD
NORTHFIELDS
MARKET DEEPING
PETERBOROUGH
PE6 8UE
TEL:[phone]
FAX:[phone]

T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page i
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/16/1.0Page ii
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/16/1.0 Page iii
♦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/16/1.0Page iv
Table Of Contents
Section
1INTRODUCTION
2SPECIFICATION
3EQUIPMENT DESCRIPTION
4INSTALLATION
5OPERATION
6PERFORMANCE TESTING
7DETAILED CIRCUIT DESCRIPTION
8CIRCUIT DIAGRAMS
9BOARD LAYOUTS
10 GENERAL ASSEMBLIES
11 PARTS LIST
12 ACCESSORIES AND LEADS
13 LOOMS

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

INTRODUCTION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 1-1
1INTRODUCTION
The Park Air Electronics (PAE) mobile transceiver Type T6M is a multi-
channel 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.

SPECIFICATIONS
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 2-1
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
Audio Output 4W into 4ohm external speaker
(<10%THD)
Temperature Range
Normal +15°C to +35°C
Operating -20°C to +55°C
Storage -40°C to +85°C
Dimensions
Width 177 mm (6.95”)
Depth 228 mm (8.98”)
Height 50 mm (1.95”)
Weight 1.75 kg (±0.1kg)
Approvals CE, SERPS, MOPS
EN300 279 Ed 2
EN 300 676
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

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

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

EQUIPMENT DESCRIPTION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 3-2
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
TX
BUSY
SCN
SQL
VOL
SEL
CH
PRI
POWER
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

EQUIPMENT DESCRIPTION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 3-3
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.

EQUIPMENT DESCRIPTION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 3-4
This page blank intentionally

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 4-1
4.Section Index
4.1General......................................................................................................................4-2
4.1.1 Scope of Instructions...................................................................................4-2
4.1.2 Tools and Test Equipment Required. ..........................................................4-2
4.1.3 Unpacking ...................................................................................................4-2
4.1.4 Mobile Radio Programming.........................................................................4-2
4.1.5 Power Source..............................................................................................4-2
4.1.6 Selecting a Mounting Location.....................................................................4-3
4.2Mobile Radio Installation............................................................................................4-3
4.2.1 Mounting Mobile Radio, Microphone and Speaker.......................................4-3
4.3Mobile Unit Connections............................................................................................4-4
4.4Power Cable Installation ............................................................................................4-4
4.5Antenna Connection ..................................................................................................4-6
4.5.1 Location.......................................................................................................4-6
4.5.2 Fitting Antenna to Fiberglass Vehicles.........................................................4-7
4.5.3 Antenna Feeder...........................................................................................4-7
4.5.4 Antenna DC Check......................................................................................4-7
4.6Loudspeaker Connection...........................................................................................4-7
4.7Serviceability Check - General Operation ..................................................................4-7
4.8Troubleshooting Flow Chart - General Operation.......................................................4-8
Figure 4-1 Mobile Radio Mounting Bracket - Dimensions 4-3
Figure 4-2 Mobile Connections 4-4
Figure 4-3 Antenna Locations 4-6
Figure 4-4 Antenna Radiation Patterns 4-6
Figure 4-5 - T6M Series General Troubleshooting Flow Chart 4-9

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 4-2
4.1 General
4.1.1 Scope of Instructions
The following installation instructions are a guide to installing the mobile radio. The use of the
mounting hardware is described and the required electrical connections are shown. A
serviceability check is described with fault-finding information.
4.1.2 Tools and Test Equipment Required.
Power drill
Hole cutter
Cross head screwdrivers
Emery paper
Connectors
Crimp tools
Wire cutters
Earthing braid
Torx screwdriver M3 (No. 10)
Torx screwdriver M2.5 (No. 8)
Hex nut spinner M3 (5.5mm)
Hex nut spinner M2.5 (5mm)
IC extraction tool CEKA T2371 or equivalent
RF Power & VSWR Meter Bird 4391 or equivalent
Programming interface lead Special PC to mobile microphone socket lead
(part number LM030400055)
4.1.3 Unpacking
Unpack the mobile radio install kit and check the contents against the packing list enclosed
with the mobile.
4.1.4 Mobile Radio Programming
To operate on the system, the mobile radio requires certain “personality” information to be
entered into memory
The mobile radio must therefore have been programmed before it can be placed in service.
This is normally done at the time of manufacture or by the equipment supplier. To program
the mobile radio, use the Mobile Programming Software.
4.1.5 Power Source
The mobile radio is designed to operate from a 13.2 VDC nominal, negative ground electrical
system. This type of electrical system has the negative battery terminal connected directly to
the vehicle chassis. For vehicles with a 24 V battery or where there must be isolation between
the battery and the equipment, a suitable DC-DC converter should be used.

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 4-3
4.1.6 Selecting a Mounting Location
Choose a safe and sensible location for the mobile radio and mounting bracket, ensuring that
the installation:
♦Is easy to operate when seat belts are worn.
♦Does not inconvenience driver or passengers when seated, or when entering or exiting the
vehicle.
♦Will not injure occupants if the vehicle suffers an impact.
♦Does not interrupt the airflow from heater or air-conditioning vents.
Suitable mounting places include the dash, console or transmission hump.
Avoid mounting in small enclosed spaces (e.g. glove lockers). To prevent excessive self-
heating, the mobile radio should have an unobstructed airflow space of at least 20 mm at the
rear.
4.2 Mobile Radio Installation
4.2.1 Mounting Mobile Radio, Microphone and Speaker
Check that the mobile mounting bracket fixing screws will not damage any cables, brake or
fuel lines when they are fitted. Then install the mounting bracket using the self-tapping screws
provided. Mounting bracket dimensions and fixing hole centers are shown in Figure 4-1.
Install the mobile radio in the bracket using the rubber grips and fixing knobs included in the
kit. The rubber grips can be fitted in two ways. One way locks the mobile radio rigidly in the
bracket. The other provides a friction mount allowing the mobile radio to be tilted to the
desired angle.
150mm
48mm
189mm
52mm
Hole
4.5mm
diameter
Figure 4-1Mobile Radio Mounting Bracket - Dimensions

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 4-4
Install the microphone rest in a convenient location using the screws provided.
Plug the microphone lead into the socket located on the underside of the front panel of the
mobile radio and fit the strain relief grommet into place.
Install the speaker in a location where it can be easily heard, using the mounting bracket and
screws provided.
4.3 Radio Unit Connections
Figure 4-2Mobile Connections
4.4 Power Cable Installation
Where possible disconnect the vehicles main positive DC supply cable from the battery to
prevent damage from accidental short circuits during the installation.
In some cases this may cause problems with the loss of engine management information or
radio key codes. Check with the customer to see if this is the case before disconnecting the
battery. Power saver devices are available which plug into the cigar lighter or accessories
socket and prevent loss of memory information on vehicle systems.
Route the power cable to the battery. If there is excess cable, cut it to the required length. If it
is necessary to drill a hole in the firewall or bulkhead to route the cable through then fit a
grommet and seal it when the installation is complete.
-
+
MOBILE UNIT
BATTERY
SPEAKER
FUSE HOLDER
ANTENNA
POWER SUPPLY
CONNECTOR
BNC
CONNECTOR
MICROPHONE
FIELD PROGRAMMER
Ignition Sense

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 4-5
Fit the in-line fuse holder in the positive (Red) lead. The fuse protects against short circuits in
the cable run, and so should be located near the battery.
Connect the black cable to the negative battery terminal connector and the red cable to the
positive battery terminal connector.
Note: Both leads of the power cable should be connected directly to the vehicle battery
terminals. Connection to other points may result in increased interference from the vehicle’s
electrical system and excessive voltage drop. If noise is still a problem, an DC noise filter
should be fitted.
In some cases a master isolation switch is fitted to the vehicle (e.g. in the case of emergency
vehicles) and it may be a legal requirement to wire to the switched side of the supply.
If required connect the ignition sense lead to the ignition switched supply on the vehicle.
Plug the power cable into the power supply in-line connector on the mobile radio, and
reconnect the positive lead to the battery.

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0Page 4-6
4.5 Antenna Connection
Install the antenna according to the manufacturer’s instructions.
4.5.1 Location
For best all round performance of the mobile radio, the antenna should be mounted in the
center of the roof. Alternative positions give degraded performance, the numbers on the
diagram below giving the order of preference.
Figure 4-3Antenna Locations
Figure 4-4Antenna Radiation Patterns
Warning: Under no circumstances should the antenna be located near to a
fuel filler cap (i.e. not closer than 300mm).

INSTALLATION
T6M SERIES MOBILE SERVICE MANUAL – SM/16/1.0 Page 4-7
In practice the siting of the antenna is a compromise between performance and practicality. If
a sunroof is fitted to the vehicle then site the antenna so that it will not be damaged when the
sunroof is opened. Mounting at the front of a sunroof can cause annoyance due to wind noise
from the antenna when the sunroof is opened.
Abrade the underside of the antenna hole with coarse emery cloth to remove paint and
produce a clean, bright bare metal surface. This will provide a good contact for the antenna
ground. Smear the surface lightly with silicone grease prior to tightening the antenna mount to
prevent corrosion.
4.5.2 Fitting Antenna to Fiberglass Vehicles
A separate ground plane must be installed for fiberglass vehicles. This can take the form of a
aluminum metal plate or close mesh. The ground plane must extend to at least a quarter of a
wavelength in every direction. Alternatively two ‘crossed’ aluminum strips can be used. Again
the distance from the antenna mounting point to the end of each strip must be at least a
quarter of a wavelength.
It will normally be necessary to use an antenna with a longer shank for fiberglass vehicles due
to the greater thickness of the material.
4.5.3 Antenna Feeder
Note: In the case of crimp connectors, use only the correct crimping tool.
Use a suitable, low-loss 50 Ωco-axial cable to provide a continuous run between the antenna
and the mobile radio equipment. Excess coaxial cable should not be coiled up as this may
cause interference and effect vehicle systems. Fit the correct antenna connector at the mobile
radio end of the feeder using either crimp or soldered connections as appropriate.
4.5.4 Antenna DC Check
♦Check for low resistance (<0.1 Ω) between the center pin of the coaxial connector and the
antenna radiator
♦Check for high resistance between the center pin of the coaxial connector and the vehicle
chassis
♦Check for low resistance between the body of the connector and the vehicle chassis
Note: Some antennas are DC earthed. If this is the case consult the manufacturer’s
installation instructions.
4.6 Loudspeaker Connection
The loudspeaker is connected to the mobile radio via PL1 (the power supply and speaker
connector shown in Figure 4-2), pins 3 and 7.
4.7 Serviceability Check - General Operation
Once the mobile radio, its accessories and antenna are installed, carry out a serviceability
check as follows: