Major tech MTD90 User manual

MTD90
MTD90
LICENCE FREE 2-WAY RADIOS
USER GUIDE
MTD90

ILLUSTRATION
MTD90 LICENCE FREE 2-WAY RADIOS
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MTD90
1 Introduction
Thank you for purchasing the MTD90. It’s a long range, low powered radio
communication device with a range of maximum 10 Km. It has no running costs other than the
minimal cost of re-charging the batteries. The MTD90 operates on 8 channels.
2 Intended purpose
It can be used for recreational purposes. For example: to keep in contact during travelling with
2 or more cars and cycling. Widely used for building sites and to keep in contact with your
children when they are playing outside, etc...
3 CE Mark
The CE symbol on the unit, user guide and giftbox indicates that the unit complies with the
essential requirements of the R&TTE directive 1995/5/EC.
4 Safety instructions
4.1 General
Please read carefully through the following information concerning safety and proper
use. Make yourself familiar with all functions of the device. Keep this manual in a safe
place for future use.
4.2 Burning injuries
• If the cover of the antenna is damaged, do not touch because when an antenna
comes in contact with the skin, a minor burn may result when transmitting.
• Batteries can cause property damage such as burns if conductive material such as
jewellery, keys or beaded chains touches exposed terminals. The material may
complete an electrical circuit (short circuit) and become quite hot. Exercise care in
handling any charged battery, particularly when placing it inside a pocket, purse or
other container with metal objects.
4.3 Injuries
• Do not place your device in the area over an air bag or in the air bag deployment
area. Air bags inflate with great force. If a PMR is placed in the bag deployment
area and the air bag inflates, the communicator may be propelled with great force
and cause serious injury to the occupants of the vehicle.
• Keep the PMR at least 15 centimetres away from a pacemaker.
• Turn your PMR OFF as soon as interference is taking place with medical
equipment.
4.4 Danger of explosion
• Do not replace batteries in a potentially explosive atmosphere. Contact sparking
may occur while installing or removing batteries and cause an explosion.
• Turn your PMR off when in any area with a potentially explosive atmosphere.
Sparks in such areas could cause an explosion or fire resulting in bodily injury or
even death.
• Never throw batteries in fire as they may explode.
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4.5 Poisoning danger
• Keep batteries away from small children.
4.6 Legal
• In some countries it is prohibited to use your PMR while driving a vehicle. In this
case leave the road before using the device.
• Turn your PMR OFF when on board an aircraft when instructed to do so. Any use
of the PMR must be in accordance with airline regulations or crew instructions.
• Turn your PMR OFF in any facilities where posted notices instruct you to do so.
Hospitals or health care facilities may be using equipment that is sensitive to
external RF energy.
• Replacing or modifying the antenna may affect the PMR radio specifications and
violate the CE regulations. Unauthorised antennas could also damage the radio.
4.7 Notes
• Do not touch the antenna while transmitting, it could affect the range.
• Remove the batteries if the device is not going to be used for a long period.
5 Cleaning and maintenance
• To clean the unit, wipe with a soft cloth dampened with water. Don’t use a cleaner or
solvents on the unit; they can damage the case and leak inside, causing permanent
damage.
• Battery contacts may be wiped with a dry lint-free cloth.
• If the unit gets wet, turn it off and remove the batteries immediately. Dry the battery
compartment with a soft cloth to minimize potential water damage. Leave the cover off
the battery compartment overnight or until completely dry. Do not use the unit until
completely dry.
6 Disposal of the device (environment)
At the end of the product lifecycle, you should not throw this product into the
normal household garbage but bring the product to a collection point for the
recycling of electrical and electronic equipments. The symbol on the product, user
guide and/or box indicate this.
Some of the product materials can be re-used if you bring them to a recycling
point. By re-using some parts or raw materials from used products you make an important
contribution to the protection of the environment. Please contact your local authorities in case
you need more information on the collection points in your area.
MTD90
Areas with potentially explosive atmospheres are often, but not always,
clearly marked. They include fuelling areas such as below deck on
boats, fuel or chemical transfer or storage facilities; areas where the air
contains chemicals or particles, such as grain, dust or metal powders;
and any other area where you would normally be advised to turn off
your vehicle engine.
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7 Using a PMR device
To communicate between PMR devices they need to be set all on the same channel and
CTCSS / DCS code (see chapter “13.7 CTCSS (Continious Tone Coded Squelch System) /
DCS (Digital Coded Squelch)” and within receiving range (up to max. 10 km in open field).
Since these devices use free frequency bands (channels), all devices in operation share these
channels(total 8 channels). Therefore, privacy is not garanteed. Anybody with a PMR set to
your channel can overhear the conversation. If you want to communicate (transmitting a voice
signal) you need to press the PTT-button 12 .
Once this button pressed, the device will go into transmit mode and you can speak into the
microphone. All other PMR devices in range , on the same channel and in standby mode (not
transmitting) will hear your message. You need to wait until the other party stops transmitting
before you can reply to the message. At the end of each transmission the unit will send a beep
if the Roger Beep is enable (see chapter “13.12 Roger Beep On/Off” ). To reply, just press the
PTT-button 12 and speak into the microphone.
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8 Included in the package
• 2 x MTD90
• 2 x Desktop Charger
• 2 x Power adapter
• 8 x AAA NiMh batteries
• User guide
If 2 or more users press the at the same time the receiver
will receive only the stongest signal and the other signal(s) will be
supressed. Therefore you should only transmit a signal
(press PTT-button 12 when the channel is free.
PTT-button 12
The range of radio waves is strongly affected by obstacles such as
buildings, concrete/metal structures, the unevenness of the landscape,
woodland, plants, … This implies that the range between two or more
PMR's may in some extreme cases be restricted to a maximum of a few
tens of meters. You will soon notice that PMR works best when there is
a minimum of obstacles between users.

9 Getting started
9.1 Installing/Removing the Belt Clip
1. To remove the belt clip from the unit, push the belt clip
(B) towards the antenna, while pulling the clip tab (A).
2. When re-installing the belt clip, a click indicates the belt
clip is locked into position
9.2 Battery Installation
1. Remove the belt clip (see chapter “9.1 Installing/Removing the Belt Clip”)
2. Lift the battery door by gently pushing the door clip (C) using your finger nail.
3. Install the NiMh batteries. Make sure that the polarity of the NiMh batteries is
correct.
4. Close the battery door.
5. Re-install the belt clip
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10 Charging the batteries
There are two ways to charge the battery of the PMR's :
10.1 Using the desktop charger
The desktop charger provides drop-in charging
convenience.
1. Put the desktop charger on a flat surface.
2. Plug one end of the supplied adapter into
an easy accessible electric socket and
the other end into the connector on the
backside of the desktop charger 28
(See Page 1 - illustration 3)
3. Put the radio in the charger as indicated.
4. The charging LED 29 will turn on if it’s properly
inserted and charging.
(See Page 1 - illustration 3)
10.2 Connecting the power adapter directly
to the PMR
1. Connect the connector of the power adapter
directly to the charger connection 3 of the
PMR.
It will take about 8 to 10 hours to fully charge the batteries.
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Do not press the -Button of the PMR’s while they are charging !PTT 12
Do not short-circuit the batteries or dispose in fire. Remove the
batteries if this device is not going to be used for a long period.
Do not charge non rechargeable batteries like Alkaline batteries in the
charger. This might damage the PMR’s and charger unit.

11 Description
(See Page 1 - illustration 3)
1. ON/OFF Volume knob
2. LCD display
3. Charger connection
4. Headset connection
5. TX LED ( on when transmitting)
6. Call button
7. Menu button
– Enter the menu settings
8. Microphone
9. Speaker
10. Down button
– Select previous value in the menu
11. Up button
– Select next value in the menu
12. PTT-button
13. Antenna
See folded cover page - illustration 3
28. Charger connection
29. Charger LED ( on when charging)
12 LCD display information
(See Page 1 - illustration 2)
14. CTCSS indication
15. DCS indication
16. CTCSS/DCS value
17. Frequency indication in MHz
18. MHz indication
19. Keypad lock icon
20. Call receive type indication
21. Battery level indication
22. Channel number
23. RX icon
– Displayed when receiving
24. TX icon
– Displayed when transmitting
25. VOX indication
26. Scanning indication
27. Dual channel mode (DCM) indication
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13 Using the MTD90
13.1 Switching On/Off the PMR radio
• Turn the “On-Off/Volume Knob” 1 clockwise. A clicking sound will
indicate that the PMR radio is switched on.
• Turn the “On-Off/Volume Knob” 1 fully counter clockwise.
The clicking sound will indicate that the PMR radio is switched off.
13.2 Battery Charge Level/Low Battery Indication
The battery charge level is indicated by the number of squares present inside
the battery icon on the LCD Screen.
Battery Full
Battery 2/3 charged
Battery 1/3 charged
Battery empty
When the battery charge level is low, the battery icon will flash and a beep will be heard to
indicate that the batteries need to be replaced or recharged.
13.3 Adjusting Speaker Volume
• Turn the “On-Off/Volume Knob” 1 clockwise to increase the speaker
volume.
• Turn counter-clockwise to lower the volume.
13.4 Receiving a Signal
The unit is continuously in the receive mode when the unit is switched ON and
not transmitting.
The display illustrations in next pages only show the icons or display
informations of the functions that are explained in the text.
In order for other people to receive your transmission, they must also
be on the same channel and have set the same CTCSS code or DCS
code. (See chapter “13.6 Changing Channels” and “13.7 CTCSS
(Continues Tone Coded Squelch System) / DCS (Digital Coded
Squelch)”. Either CTCSS or DCS can be used but never both at the
same time.

13.5 Transmitting a Signal
• Press and hold the PTT - button 12 to transmit. The TX symbol is
displayed.
• Hold the unit in a vertical position with the microphone 10cm from the
mouth and speak into the microphone.
• Release the PTT - button 12 when you want to stop transmitting.
13.6 Changing Channels
• Press the - button 7 once, the current channel number flashes on the
display.
• Press the - button or the - button 10 to change the channel.
• Press the PTT - button 12 to confirm and return to stand-by mode.
13.7 CTCSS (Continious Tone Coded Squelch System) /
DCS (Digital Coded Squelch)
License free PMR radio's operating on the 446 MHz frequency band, like the
MTD90 PMR, have 8 available radio channels. If there are many PMR users
in your neighborhood, there is a chance that some of these users are
operating on the same radio channel.
To prevent that you receive signals from other users, sub-channels have
been integrated. Two PMR radio's will only be able to communicate with
each other when they are operating on the same radio channel and when
they have selected exactly the same sub-channel.
There are two kind of sub-channels :
• Continuous Tone Coded Squelch System (CTCSS)
• Digital Coded Squelch (DCS)
When using CTCSS, a low frequency tone (between 67 and 250 Hz) will be
transmitted along with the voice signal. There are 38 available tones to
choose from. You are free to choose one of these 38 available tones. Due to
filtering, these tones will generally not be audible so they will not disturb the
communication.
DCS is similar to CTCSS, but instead of sending a continuous tone of a
selected frequency, a digital data transmission is added to the radio signal.
This Digital Code is transmitted at a really low rate, around 134 bits per
second (the code is 23 bits long). Only the PMR's of the latest generation will
support DCS. There are 83 available DCS codes that can be used. Since
earlier models will only support CTCSS it will be better to use DCS to
To check the channel activity use the monitor function
(See chapter “13.8 Monitor”).
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If no button is pressed within 5 seconds during setting, the unit will
return to standby.

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To disable CTCSS or DCS, select code "00" for CTCSS or for DCS in the
menu. When the entry is confirmed, "OF" will be displayed.
During channel monitoring the receiver circuit in the PMR will not listen
to CTCSS or DCS codes.
The PMR is capable of voice activated (VOX) transmission. In VOX mode, the radio
will transmit a signal when it is activated by your voice or other sound around you.
VOX operation is not recommended if you plan to use your radio in a noisy or windy
environment.
VOX mode will be overrided when you press the PTT - button 12 .
PTT
PTT

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If you press the PTT - button 12 while listening to a found channel, the
PMR will go back in stand-by mode on the found channel.
PTT
PTT

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• If you press the PTT - button while listening to a found CTCSS
code, the PMR will go back in stand-by mode on the channel with
the CTCSS code.
• If no CTCSS code is detected there is a chance that DCS is
selected by the user. In this case you can scan for the DCS code.
(section 13.10.3)
If you press the PTT - button 12 while listening to a found DCS code, the
PMR will go back in stand-by mode on the channel with the DCS code.
The MTD90 has 15 call tones
PTT
PTT

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PTT
PTT

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PTT
PTT
PTT
PTT
PTT

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Cnr Rover and Jaguar Roads,
Rustivia Ext. 3, Elandsfontein
P.O. Box 888, Isando 1600 South Africa
CONTACT DETAILS
Telephone: [phone]
Sales Facsimile: [phone]
E-mail: [email protected]
National Tel Nr: 08 61 62 5678
Website: www.major-tech.com