Tait TMAH5C, TMAH6C, TMAD1C, TMAB1C Users Manual

Tait general software licence agreement
This legal document is an Agreement between you (the “Licensee”) and Tait Electronics Limited (“Tait”). By using any of the Software or Firmware items prior­installed in the related Tait product, included on this CD or downloaded from the Tait website, (hereinafter referred to as “the Software or Firmware”) you agree to be bound by the terms of this Agreement. If you do not agree to the terms of this Agreement, do not install and use any of the Software or Firmware. If you install and use any of the Software or Firmware that will be deemed to be acceptance of the terms of this licence agreement.
The terms of this agreement shall apply subject only to any express written terms of agreement to the contrary between Tait and the Licensee.
Licence
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March 2004 © Tait Electronics Ltd Tait general software licence agreement
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2 Tait general software licence agreement
About this guide
This users guide provides information about the TM8250 and TM8255 mobile radios and is divided into two parts.
Part A explains how the TM8255 radio operates. The TM8250 radio has a control head without user controls, so no TM8250 operating information is needed.
Part B outlines the installation procedure for both TM8250 and TM8255 radios and describes the pin allocations of the two programming connectors
Important safety information
This users guide also contains important safety information about using and installing TM8250 and TM8255 radios. Refer to page 11 for user safety and compliance instructions and page 30 for installation safety instructions.
Alert notices
Within this guide, four types of alerts are given to the reader: warning, caution, important and note. The following para­graphs illustrate each type of alert and its associated symbol.
Warning: There is a potential risk of death or serious injury.
Caution: There is the risk of minor or moderate injury to people.
Important: There is a risk of equipment damage or malfunction.
on the
TM8250 control head.
Note: This highlights information that is required to ensure that procedures are performed correctly.
Updating this guide
In the interests of improving the performance, reliability or servicing of the equipment, Tait Electronics Ltd reserves the right to update both the equipment or this users guide, without prior notice.
About this guide 3
4 About this guide
Your radio’s settings
Use the following table to list your radios programmed settings.
Function key settings
quick access menu:
Frequently used channels
ID Description ID Description
speaker
amber
green
red
radio status LEDs
LCD
(liquid crystal
display)
scroll keys
left selection key right selection key
PTT key
(press-to-talk)
microphone
on/off key
volume
control
microphone
socket
function keys
1 to 4
Navigating your radio’s menus
Main menu: conventional mode
Note: Only menus associated with features programmed on your radio will be available.
.
Part 1: Radio operation
Tait general software licence agreement ................................... 1
About this guide .......................................................................... 3
Important safety information ....................................................................... 3
Alert notices ............................................................................................... 3
Updating this guide .................................................................................... 3
Your radio’s settings .................................................................... 5
Navigating your radios menus ................................................... 7
Safety and compliance warnings .............................................. 11
Radio frequency exposure information ...................................................... 11
Using this radio ..................................................................................11
Controlling your exposure to RF energy ..................................................... 11
Compliance with RF energy exposure standards ........................................12
Warning: Safe radio operation .................................................................. 13
Caution: EN 60950 requirements .............................................................. 13
Caution: High temperatures ...................................................................... 13
Important: Radio protection ...................................................................... 13
Getting started ........................................................................... 14
Radio controls .......................................................................................... 14
Radio indicators ........................................................................................ 16
Radio display ...................................................................................... 16
Radio display icons ............................................................................. 17
LED indicators .................................................................................... 18
Audible tones ..................................................................................... 18
Basic operation ........................................................................... 19
Turning the radio on and off ..................................................................... 19
Entering your PIN ..................................................................................... 19
Adjusting the speaker volume ................................................................... 19
Using the radio menu ............................................................................... 19
Quick access menu ............................................................................. 20
Selecting a channel or group ..................................................................... 20
Making a call ........................................................................................... 20
Making a call on a conventional network ............................................ 20
Making a call on an MPT trunked network .......................................... 21
Transmit timer .................................................................................... 21
Receiving a call ......................................................................................... 21
Radio operation 9
Changing networks .................................................................................. 22
What you hear on a channel ..................................................................... 22
Signalling mute .................................................................................. 23
Squelch .............................................................................................. 23
Checking that a channel is clear ................................................................ 23
Activating monitor using the monitor function key ............................... 23
Activating monitor using the menu ..................................................... 24
Troubleshooting ......................................................................... 25
When your radio won’t turn on ................................................................. 25
Removing the radio from the vehicle ......................................................... 25
Audible tones ........................................................................................... 26
Notes ............................................................................................ 28
10 Radio operation
Safety and compliance warnings
Radio frequency exposure information
For your own safety and to ensure you comply with the Federal Communication Commission’s (FCC) radio frequency (RF) exposure guidelines, please read the following information before using this radio.
Using this radio
You should use this radio only for work-related purposes (it is not authorized for any other use) and if you are fully aware of, and can exercise control over, your exposure to RF energy. To prevent exceeding FCC RF exposure limits, you must control the amount and duration of RF that you and other people are exposed to.
It is also important that you:
Do not remove the RF Exposure label from the radio.
Ensure this RF exposure information accompanies the
radio when it is transferred to other users.
Do not use the radio if you do not adhere to the guide­lines on controlling your exposure to RF.
Controlling your exposure to RF energy
This radio emits radio frequency (RF) energy or radio waves primarily when calls are received and made. RF is a form of electromagnetic energy (as is sunlight), and there are recom­mended levels of maximum RF exposure.
To control your exposure to RF and comply with the maxi­mum exposure limits for occupational/controlled environ­ments, follow these guidelines:
Do not talk (transmit) on the radio more than the rated transmit duty cycle. This is important because the radio radiates more energy when it is transmitting than when it is receiving.
Safety and compliance warnings 11
While you are transmitting (talking or sending data) on the radio, you must ensure that there is always a distance of 0.9m (35 inches) between people and the antenna. This is the minimum safe distance.
Use the radio only with Tait-approved antennas and attachments, and make only authorized modifications to the antenna otherwise you could damage the radio and violate FCC regulations.
For more information on what RF energy is and how to control your exposure to it, visit the FCC website at http:// www.fcc.gov/oet/rfsafety/rf-faqs.html.
Compliance with RF energy exposure standards
This two-way radio complies with these RF energy exposure standards and guidelines:
United States Federal Communications Commission, Code of Federal Regulations; 47 CFR part 2 subpart J
American National Standards Institute (ANSI) / Institute of Electrical and Electronic Engineers (IEEE) C95. 1-1992
Institute of Electrical and Electronic Engineers (IEEE) C95.1-1999 Edition.
This radio complies with the IEEE (FCC) and ICNIRP exposure limits for occupational/controlled RF exposure environments at operating duty factors of up to 50% talk to 50 % listen.
12 Safety and compliance warnings
Warning: Safe radio operation
Switch the radio off at petrol filling stations or near flammable liquids or gases.
Switch the radio off in the vicinity of explo­sive devices and blasting zones.
Using a handheld microphone or a radio while driving a vehicle may violate the laws and legis­lation that apply in your country or state. Please check the vehicle regulations in your area.
Caution: EN 60950 requirements
This radio complies with the European Union standard EN 60950 when operated up to the rated 33% duty cycle of two minutes transmit and four minutes receive, and with ambient temperatures of 30°C or lower.
Operation outside these limits may cause the external temper­ature of the radio to rise higher than this standard permits.
Caution: High temperatures
The bottom surface of the radio and the heatsink fins can become hot during prolonged operation. Do not touch these parts of the radio.
Important: Radio protection
Always remove the fuses from the radio power cable before charging the vehicle battery, connecting a second battery or using power from another vehicle (e.g. when “jump- starting the vehicle).
Safety and compliance warnings 13
This section provides a brief description of your radio’s basic operation. If you need further information, contact your radio provider.
Radio controls
The radio controls are the PTT key, volume control, on/off key, scroll keys, selection keys and function keys. Some keys may have functions assigned to both short and long key presses:
a short key press is defined as less than one second, and
a long key press is more than one second.
The radio controls and their functions are summarized in the diagram and table on the following page.
Getting started
14 Getting started
PTT key (press-to-talk)
microphone
on/off key
volume control
microphone socket
function keys 1 to 4
left selection key right selection key
scroll keys
Symbol Name Function
PTT press and hold to transmit and release
to listen MPT mode: initiates a call from the idle state
volume control rotate to change the speaker volume
power key turn the radio on or off with a long press
left selection key action determined by the text above the left
selection key
right selection key action determined by the text above the right
selection key
scroll keys scroll up and down through a list of menu
options or scroll left and right in messages, or access the lists of channels or preset calls
function keys
function keys with programmed options
1, 2, 3 and 4
radio status LEDs
LCD (liquid crystal display)
red
green
amber
speaker
Getting started 15
Radio indicators
The radio display, LED indicators and the radios audible tones all combine to give you information about the state of your radio.
The most common operation of the radio display and indica­tors is described in the following sections.
Radio display
The messages and icons you see in your radio display depends upon the mode in which your radio is operating. Also, your radio may be programmed to display programmed information on start-up, such as your network identity.
The following diagrams show two typical displays, one of a radio operating in conventional mode and the other in MPT trunked mode.
Note: The way these indicators behave may be affected by the way your radio is programmed.
16 Getting started
conventional mode display
left selection
key text
MPT trunked mode display
scrolling icon
scrolling icon
radio display icons
right selection key text
radio display icons
Radio display icons
Icon Meaning
RSSI (received signal strength indicator): the more bars on the indicator, the stronger the signal being received by your radio.
MPT network available: your radio has access to an MPT network
flashing: your radio is attempting to access an MPT network
transmit: your radio is transmitting
low-power transmit: your radio is transmitting on low-power
scanning: your radio is monitoring a group of channels for activity
monitor or squelch override: monitor or squelch override is active
quiet mode: you are in quiet mode and your radio keypress tones and confidence tones have been turned off
scrolling: you can use the scroll keys or to move through a list
Getting started 17
LED indicators
LED Meaning
red (transmit)
green (receive)
amber (scanning or network)
glowing: your radio is transmitting
flashing: your transmit timer is about to expire glowing: you are receiving
flashing: you have received a call glowing: your radio is scanning a group of chan-
nels for activity (conventional mode) or network service is available (MPT trunked mode)
flashing: your radio has detected activity on a channel, and has halted on this channel (conventional mode)
flashing fast: in trunked mode, there is no network service available
Audible tones
Note: If quiet or silent mode has been turned on, you will not hear any audible tones.
Refer to page 26 for a description of other tones you may hear.
Tone ty p e
two short beeps
Meaning
radio turned on: the radio is powered on
and ready to use one short beep one short beep
radio turned off: the radio is powered off
valid keypress: the action you have
attempted is permitted one long, low-
pitched beep one long, low-
pitched beep
invalid keypress: the action you have
attempted is not permitted
transmission inhibited: you have attempted
to transmit but for some reason transmis-
sion is not permitted at this time
18 Getting started
Basic operation
This section describes the basic operation of your radio, includ­ing turning the radio on and off and adjusting the volume.
Turning the radio on and off
A long press of the on/off key turns the radio either on or off. When the radio is first turned on, the red, green and amber LEDs flash briefly and the radio gives two short beeps.
Entering your PIN
You may need to enter a PIN (personal identification number) before you can use your radio. If the message radio locked enter pin is displayed, enter your assigned PIN.
Once you have entered you PIN correctly, the pin accepted message appears and normal operation is now possible.
If you do not know your PIN or you receive the incorrect pin message after entering your PIN, consult your radio provider.
Adjusting the speaker volume
Rotate the volume control clockwise to increase the speaker volume and counterclockwise to decrease the volume. The volume control also changes the volume level of the radios audible indicators.
Using the radio menu
Whenever Menu appears above the right selection key, press the right selection key to enter the main menu.
Use the scroll keys or to move through the list of menus.
When the menu you want is highlighted, press Select using the right selection key and the menu you have chosen is displayed.
Basic operation 19
Quick access menu
A menu that is used frequently may be programmed as your quick access menu. To go to your quick access menu, press a scroll key or , and the menu is displayed.
For example, if your channels menu is your quick access menu, press a scroll key or to go directly to the channels menu.
Selecting a channel or group
To select a channel or group you can either:
use the scroll keys or to scroll through the
channel list until the channel or group you want is displayed, or
use the menu (see Using the radio menu” on page 19).
Making a call
The network that your radio is operating on determines the way you make a call. The two network options that affect the calling procedure are:
conventional, and
MPT trunked.
Making a call on a conventional network
1. Select the required channel, group or zone.
2. Check the green LED.
If the green LED is glowing, the channel is busy and you cannot transmit.
3. Once the channel is clear (the green LED is off), lift the
microphone off the microphone clip.
4. Hold the microphone about 5 cm (2 inches) from your
mouth and press the PTT key to transmit.
20 Basic operation
5. Speak clearly into the microphone and release the PTT key when you have finished talking.
Making a call on an MPT trunked network
1. Select the required channel, and press the PTT key.
2. Once the person you have called replies, lift the micro­phone off the microphone clip.
3. Hold the microphone about 5 cm (2 inches) from your mouth and press the PTT key to transmit.
4. Speak clearly into the microphone and release the PTT key when you have finished talking.
Transmit timer
Your radio may have a transmit timer that limits the amount of time you can transmit continuously. When the transmit timer is about to expire, the red LED flashes and the radio gives three beeps. You must release the PTT before you can transmit again.
Receiving a call
When there is valid activity on your radio’s currently selected channel or group, the radio then unmutes and you can hear the call.
If the incoming call contains special signalling that matches the signalling programmed for your radio, the green LED flashes and your radio may give a ringing tone.
Note: You cannot change channels while transmitting.
Note: Your radio may be unable to transmit for a short time after the transmit timer has expired.
Basic operation 21
Changing networks
1. Press Menu and scroll through the list of menu items until Networks is displayed.
2. Press Select to enter the Network Menu and the current network is highlighted.
3. Scroll down the list until the required network option is displayed, and press
4. Press
Ye s
when you are prompted to confirm your selection.
What you hear on a channel
Your radio may be programmed so that you hear all conversa­tions on a channel, or your user group may be segregated from other user groups by using special signalling. The special signalling is used to control the muting and unmuting of your radio, so that your radio is muted when other user groups are talking and unmuted for members of your user group.
The two muting controls that operate in your radio are:
signalling mute, and
squelch.
Select
.
22 Basic operation
Signalling mute
The radios signalling mute only allows the radio to unmute if the incoming call carries the tones specific to your user group. Your user group may use tones that are either audible, subaudible or both.
Squelch
The radios squelch allows the radio to unmute only when the strength of the incoming signal is above a predetermined threshold. This means that only signals of reasonable intelli­gibility are made audible.
Checking that a channel is clear
Use the monitor function to check that the channel is clear before you make a call. While monitor is on, the green LED flashes continually and the monitor icon is displayed.
To activate monitor, you can either:
use a function key that may have been programmed for monitor, or
use the menu.
Activating monitor using the monitor function key
1. Press the monitor function key and monitor overrides the signalling mute, allowing you to hear any traffic on the channel.
Note: Your radio may be programmed to activate monitor whenever the microphone is off the
microphone clip.
2. Press the monitor function key again to turn monitor off.
Basic operation 23
Activating monitor using the menu
1. Press Menu, and scroll through the list of menu items until Function Settings is displayed.
2. Press Select to enter the func­tion settings menu, then scroll down the list of menu items until Monitor is displayed.
3. Press Select to select monitor, then Select to select On.
24 Basic operation
Troubleshooting
When your radio wont turn on
If the red, green and amber LEDs on the control head do not light up when the radio is turned on, it is likely that no power is reaching the radio. Check the following:
Is the power connector firmly plugged into the rear of the radio?
Are the in-line fuses in good condition?
Is the power cable securely connected to the vehicle bat-
tery or power supply?
If all appears to be in order, then contact your radio provider for further assistance.
Removing the radio from the vehicle
a
c
d
a
b
1. Switch off the radio.
2. Unscrew the four thumb screws that secure the radio to the U-bracket .
b
a
3. Lift the radio clear of the U-bracket.
4. Disconnect the antenna and power cable from
c
d
the rear of the radio.
Troubleshooting 25
Audible tones
The following table gives a list of the radios audible tones, additional to those explained on page 18.
Action and tone Meaning
one short beep after the power-up beeps
one long, low-pitched beep
two short beeps
one short beep
one short, low-pitched beep
one long, low-pitched beep
one short, high-pitched beep
two short beeps
three beeps transmit timeout imminent: in 10 seconds
two low-pitched beeps
radio locked: you need to enter your PIN (personal identity number) before you can use the radio
radio PIN entry unsuccessful: you need to re-enter your PIN
radio PIN entry successful: the radio is ready to use
function activated: a function key has been pressed and that function has been initiated
function de-activated: a function key has been pressed and the correspond­ing function has been turned off
transmission inhibited: you have attempted to transmit but for some reason transmission is not permitted at this time
radio is stunned: the radio has been made inoperable by your service provider
radio is revived: the radio has made operable by your service provider
your transmit timer will expire and your current transmission will be terminated
radio's temperature is high: the radio's temperature is in the high­temperature range, but the radio will continue to operate
26 Troubleshooting
Action and tone Meaning
two high-pitched beeps radio's temperature is very high: the
radio's temperature is in the very high temperature range and all transmissions will now be at low power; if the radio's temperature rises outside this range, transmissions will be inhibited
continuous low-pitched tone
radio system error: a system error has occurred and the radio may be inoper­able. (the LCD usually displays either
E1
or E2)
two long low-high pitched tone pairs
synthesizer is out-of-lock: the radio's synthesizer is out-of-lock on the current channel and you cannot operate on that channel (LCD will usually be flashing
OL
)
Troubleshooting 27
Notes
28 Notes
Part 2: Radio installation procedures
Installation warnings ................................................................. 30
Warning: Safe radio mounting .................................................................. 30
Warning: Interference with vehicular electronics ........................................ 30
Warning: Liquefied petroleum gas powered vehicles .................................. 30
Important: Non-standard radio installations .............................................. 31
Important: Negative ground supply ........................................................... 31
Installation planning .................................................................. 32
MPT 1362 code of practice ....................................................................... 32
Checking equipment ................................................................................. 32
Installation tools ....................................................................................... 32
Microphone clip installation tools (TM8255 only) ................................ 33
Mounting position .................................................................................... 33
Radio Installation ....................................................................... 34
Mounting the U-bracket ........................................................................... 34
Control head handling precautions ........................................................... 34
Installing the control head on the radio body ............................................ 34
Removing the control head ....................................................................... 35
Installing the microphone ......................................................................... 36
Installing the antenna ............................................................................... 36
Warning: RF exposure hazard ............................................................. 36
Antenna termination ........................................................................... 37
Power cable ............................................................................................. 37
Installing the power cable ................................................................... 37
Installing the radio in the U-bracket .......................................................... 38
Microphone clip (TM8255 radios only) ...................................................... 39
TM8250 connectors .................................................................................. 39
Installation checks .................................................................................... 40
Other installation options ......................................................... 40
Radio installation procedures 29
Installation warnings
Warning: Safe radio mounting
Mount the radio securely so that it will not break loose in the event of a collision. An unsecured radio is dangerous to the vehicle occupants.
Mount the radio where it will not interfere with the deployment of passenger air bags.
Do not mount the radio vertically, with the control head facing down. This will violate compliance with the Euro­pean Union standard EN 60950, Safety of Information Technology Equipment.
Warning: Interference with vehicular electronics
Some vehicular electronic devices may be prone to malfunc­tion, due to the lack of protection from RF energy present when your radio is transmitting.
Examples of vehicular electronic devices that may be affected by RF energy are:
electronic fuel injection systems
electronic anti-skid braking systems
electronic cruise control systems.
If the vehicle contains such equipment, consult the vehicle manufacturer or dealer in order to determine whether these electronic circuits will perform normally when the radio is transmitting.
Warning: Liquefied petroleum gas powered vehicles
Radio installation in vehicles powered by LP (liquefied petro­leum) gas with the LP gas container in a sealed-off space within the interior of the vehicle must conform to the National Fire Protection Association Standard NFPA 58. This standard states that the radio equipment installation must meet the following requirements.
30 Installation warnings
The space containing the radio equipment shall be iso­lated by a seal from the space containing the LP gas con­tainer and its fitting.
Outside filling connections shall be used for the LP gas container and its fittings.
The LP gas container space shall be vented to the outside of the vehicle.
Important: Non-standard radio installations
The installation U-bracket described in this guide has been designed so that there is enough airflow around the radio to provide cooling.
If a non-standard installation method is used, care must be taken that sufficient heat can be dissipated from the radio heatsink fins and the bottom surface of the radio chassis.
For this to be achieved, there must be a gap of more than 10mm (0.4 inch) between the bottom surface of the radio chassis and the mounting surface. This is illustrated in the following diagram.
10mm
mounting surface
Important: Negative ground supply
TM8200 radios are designed to operate only in a negative ground system.
Installation warnings 31
Installation planning
The procedures outlined in this and the following sections are for installing a TM8250 or TM8255 radio in a vehicle, using a standard U-bracket.
MPT 1362 code of practice
TM8200 radios should be installed in accordance with the MPT 1362 Code of Practice. This code of practice covers the installation of mobile radio equipment in land based vehicles and has been developed by the United Kingdom Radiocom­munications Agency.
The full text of the MPT 1362 Code of Practice can be found at the Radiocommunications Agency website, www.radio.gov.uk.
Checking equipment
Unpack the radio and check that you have the following items:
radio control head with connecting loom
radio body
microphone with microphone clip and screws
(TM8255 only)
installation kit, consisting of:
U-bracket with screws power cable with DC connector 10A fuses fuse holders BNC antenna plug.
Installation tools
The following installation tools may be required:
portable drill
8mm (0.3 inch) socket
BNC crimp tool
32 Installation planning
in-line RF power meter capable of measuring forward and reflected power at the operating frequency of the radio.
Microphone clip installation tools (TM8255 only)
The following installation tools may be required for installing the TM8255 microphone:
centre punch
drill bit
Pozidriv screwdriver
hammer.
Mounting position
Inspect the vehicle and determine the safest and most convenient location for mounting the radio.
The installation must meet the following requirements:
sufficient clearance behind the radio for the heatsink and cables
a large enough flat surface so that the mounting bracket will not be distorted
no danger of the radio interfering with air bag deployment.
Installation planning 33
Radio Installation
Mounting the U-bracket
Screw the U-bracket in the chosen mounting position using the self-tapping screws provided. At least four screws must be installed. If the U-bracket is being mounted over a curved surface, bend the U-bracket tabs slightly.
Important: Check that the U-bracket is not distorted when the screws are tightened.
Control head handling precautions
Important: The control head contains devices which can be damaged by static discharges. Always install or
remove the control head in a static-safe environment.
Information on antistatic precautions can be found at the Electrostatic Discharge Association (ESD) website, www.esda.org.
Installing the control head on the radio body
2
1
2
The orientation of the U-bracket mounting determines which way up the control head is mounted on the radio
34 Radio Installation
body. The numbers in the diagram on the previous page refer to the numbered steps below.
1. Plug the control head loom onto the control head connector.
2. Insert the bottom edge of the control head onto the two clips in the front of the radio chassis, then snap into place.
Removing the control head
Important: During this procedure, take care that the chassis seal is not damaged. Damage to this seal
reduces environmental protection.
1. On the underside of the radio, insert a flat-bladed screw­driver between the control head and the radio chassis seal, in either position or .
Note: Insertion points and are indicated on the radio chassis by a dot-dash-dot
pattern (
2. Use the screwdriver to lift the control head off the chassis clip, then repeat in the other position.
The control head can now be removed from the radio body.
•).
1
2
2
1
2
1
Radio Installation 35
Installing the microphone
Important: The microphone grommet must be installed whenever the microphone is plugged into the micro-
phone socket. When installed, the grommet has two functions:
to prevent damage to the microphone socket when there is movement of the microphone cord, and
to ensure that the control head is sealed against water, dust and other environmental hazards.
1. Plug the microphone into the microphone socket on the control head.
2. Slide the microphone grommet along the microphone cord and push two adjacent corners of the grommet into the microphone socket cavity.
3. Squeeze the grommet and push the remaining corners into position.
4. Check that the grommet is seated correctly in the cavity.
Installing the antenna
Install the external antenna according to the supplier’s instructions. Good quality 50 ohm coaxial cable must be used, such as RG58 or UR76.
Important: The cable should be routed in a manner that minimizes coupling into the electronic control systems
of the vehicle.
Warning: RF exposure hazard
To comply with FCC RF exposure limits, this product must be installed using an externally mounted antenna with either a
2.15dBi or 5.15dBi gain.
microphone
grommet
control head
36 Radio Installation
Power cable
This antenna must not be mounted at a location such that any person or persons can come closer than 0.9m (35 inches) to the antenna.
Antenna termination
1. Run the free end of the coaxial cable to the radios mounting position and cut it to length, allowing 20 ­30cm (8 - 12 inches) excess.
2. Terminate the free end of the cable with the BNC plug supplied.
Important: This radio is designed to operate from a
nominal 12V negative ground supply and may draw up to 8A of current. The radio will tolerate a supply voltage range of 10.8V to 16.0 V at the radio.
In vehicles with a supply voltage greater than 16.0V, such as many trucks, it is essential to provide a suitably rated DC to DC converter. This will isolate the radio from excessive battery volt­age and provide the correct DC operating conditions.
Installing the power cable
Important: Disconnecting the vehicles battery may
cause problems with some electronic equipment, such as vehicle alarms, engine management systems and in-car entertainment systems. Check that the vehicle owner has the necessary information to make all electronic equipment func­tion correctly after battery reconnection.
1. Disconnect the vehicles battery, unless specifically
prohibited from doing so by the customer, vehicle manu­facturer, agent or supplier.
If the battery is not disconnected, exercise extreme caution throughout the installation and install the fuses only when the installation is ready to be checked (see Installation checks on page 40).
Radio Installation 37
2. Determine where the power cable will be routed. Important: The power cable should be protected
from engine heat, sharp edges and from being
pinched or crushed.
3. Cut the negative and the positive wires where the in-line fuse
holders will be placed (as close to the battery as possible).
Note: Do not install the fuses until the installation is ready to be checked.
4. Insert each end of the negative wire into one of the in-
line fuse holders and crimp them to force the metal contacts onto the wires.
5. Connect the negative wire to the battery ground.
6. Repeat step 4 for the positive wire and connect it to the
positive terminal of the battery.
Installing the radio in the U-bracket
1. Connect the antenna and power cables to the rear of
2. Position the radio in the U-bracket so that the holes in the
3. Screw the radio into position using the four thumb screws
38 Radio Installation
the radio.
U-bracket line up with the holes in the radio chassis.
but without fully tightening the screws.
4. Position the radio in the U-bracket for best viewing angle, then tighten the thumb screws.
Microphone clip (TM8255 radios only)
Install the microphone clip in the most convenient location for the radio user. It must be within easy reach of the user, but in such a position that the microphone PTT key cannot be inadvertently activated or jammed on.
TM8250 connectors
The TM8250 control head has two RJ45 sockets for program­ming, and a power on/off LED.
Note: The pins of the two programming connectors are connected in parallel, so care needs to be taken
when connecting external devices to these connectors.
The pin allocations for these connectors are explained in the following diagram and table.
Pin
Programming
programming
connector 1
programming
connector 2
Description
LED
connectors
ON/OFF hardware power on/software
power off
13.8V unswitched 13.8V power supply
RX AUD receive audio output
MIC AUD microphone audio input
RS485- RS485 compliant output
Radio Installation 39
Pin
Programming connectors
RS485+ RS485 compliant output
AGND analogue ground
DGND digital ground
Installation checks
1. Insert the fuses into the power leads.
2. TM8255 radios only. Switch on the radio to confirm that it is operational (see
Turning the radio on and off on page 19).
3. Connect an in-line power meter between the radio and the antenna and measure the forward and reflected power levels.
Less than 4% of the forward power should be reflected. If this is not achieved, check the installation, including the antenna length.
4. TM8255 radios only. Once the reflected power levels are within tolerance,
make a call to another party on the radio (see “Selecting a channel or group and Making a call, on page 20).
Description
Important: Do not transmit yet.
Contact your radio provider for further information.
40 Other installation options
Other installation options
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