WT-548 - Tempo (Aust)

N13275
Two-Way Radio
Instruction Manual • Model Number WT-548
After Sales Support
TEL: 1300 886 649

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Two-Way Radio
What your 1 year warranty means
Congratulations on choosing to buy a TEVION ® product.
All products brought to you by TEVION ® are manufactured to the highest standards
of performance and safety and, as part of our philosophy of customer service and
satisfaction, are backed by our comprehensive 1 year warranty. We hope you will
enjoy using your purchase for many years to come.
After Sales Support TEL: 1300 886 649

Contents
What your 1 year warranty means 1
Important safety instructions 3
Buttons and controls 4
Operating instructions Main screen
Battery installation
Quick start guide A. Start operation 6
Power on / off
Key lock / unlock
B. Two-way radio operations 6
Selecting a channel
Selecting a sub-code
Making a call
Transmitting a message
Receiving a call
Using earphones
Function set-up Selecting a channel
Selecting a sub-code
Automatic channel scan
Auto squelch (SQ)
VOX function
Monitor function
Volume level adjustment
Other functions “Roger beep”
Repeater function
Screen backlight
Low battery alert
Charging
Setting memory
Technical specifications 9
Transmit - receive frequencies (MHz)
Interference eliminator code chart
FAQs 11
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Important safety instructions
When using your two-way radio equipment, the following basic safety precautions should always be
followed to reduce the risk of fire, electric shock and injury to persons.
• Make sure to read, understand and follow all instructions and warnings.
• Take care not to drop the two-way radio as a fall may damage the product.
• Never spill liquid of any kind on or into the product.
• Avoid using this unit and switch it off during an electrical storm.
• Do not attempt to open the product yourself and do not have it serviced by unauthorised personnel.
In case of a defect, contact after sales support line for advice.
Caution:
• Avoid using the unit with non-rechargeable batteries as the charging operation can only be
performed with suitable rechargeable batteries.
• To reduce the risk of electric shock, do not expose this appliance to rain or moisture.
• Do not hold the antenna while the radio is in use, or transmission quality will be affected.
• Your two-way radio set has been fully adjusted prior to shipment from the factory.
• Never open your two-way radio or adjust the settings inside the device.
• Never change or replace anything in your two-way radio set except the battery.
• To clean your two-way radio set, use a soft cloth dampened with water. Do not use liquid or aerosol
cleaners or corrosive solvents, which may damage the radio housing and leak inside, causing
permanent damage.
After Sales Support TEL: 1300 886 649

Buttons and controls
NECK
STRAP HOLE
FUNCTION/LOCK KEY
CALL/MON KEY
PTT KEY (Push-To-Talk)
MIC
MIC
EARPHONE JACK
(connections not supplied)
FUNC
NECK
STRAP HOLE
SOFT ANTENNA
DOWN/VOLUME
CONTROL KEY
UP/VOX KEY
SCREEN DISPLAY
SPEAKER
PTT
CHARGING JACK
(connections not supplied)
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Operating instructions
Main screen
See Fig. 1 for an illustration of the main screen.
1 VOX indicator
2 Call mode (Call)
3 Transmitting mode (TX)
4 Receiving mode (RX)
5 Channel number: displays current channel (1-40)
6 Battery level indicator
-- Full
-- Reminder to change the batteries.
-- Blinking: batteries must be changed.
7. Key lock indicator
Battery installation
1. Ensure the unit is off. Press the button on the belt clip and rotate
clockwise or counter-clockwise 90°.
2. Open the battery compartment door.
3. Install 3 AAA batteries according to the + / - signs in the battery
compartment.
4. Close the battery compartment door. Press and rotate the belt clip to
its normal position.
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Fig.1

Quick start guide
A. Start operation
Power on / off
1. Press and hold the FUNCTION key for three seconds, a “tic” sound indicates the radio is ready (Fig. 2).
2. Repeat the same to turn off the radio.
Key lock / unlock
1. To lock the keys, press and hold the FUNCTION key, then press the PTT key. A lock will
appear on the screen display (Fig. 3).
2. To unlock the keys, repeat the same as above (Fig. 2).
NOTE: Under key lock mode, all keys will be locked except PTT and CALL.
B. 2-way radio operations
Selecting a channel
1. Press the / key to select the channel, e.g. Channel 40 (Fig. 2).
2. Set both units into the same channel for communication, e.g. both screens will show 40. Fig.3
3. Australian regulations prohibit use of Channels 22 and 23 for speech telephony (data only).
Selecting a sub-code
1. Press the FUNCTION key twice within one second to enter the CTCSS sub-code setting (this will
reduce the incidence of other users sharing the two-way radio communications channel). The
screen will display as illustrated in Fig. 4. One second later, it will be blinking and show the current
sub-code (Fig. 5).
2. Press the / key to select sub-code 00/01-38.
3. Press the FUNCTION key again one more time to confirm and return to the main screen.
4. If the sub-code is not confirmed after two seconds, the setting will be confirmed
automatically and return to the main screen.
5. Set both units into the same sub-code, e.g. both units will show 38 as the sub-
code.
Making a call
1. Press the CALL/MON key once to transmit to the other unit (Fig. 6).
(Brief audio signals indicate the start and end of a call tone transmission.)
2. Australia regulations prohibit use of Channels 5 and 35 for calling function
(emergency only).
NOTE: A call tone (of not more than three seconds) can be transmitted once only within a
minute in the same channel. To make a call tone immediately, switch to another channel.
Transmitting a message
Press and hold the PTT key to speak into the microphone, keeping it about 2.5–5cm from
the mouth (Fig. 7). The screen displays TX, indicating the unit is in transmission mode.
NOTE: Maximum continuous transmission, while holding the PTT key, is three minutes.
Fig.7
Receiving a call
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At the end of the call, release the PTT key to receive the signal from the other device (Fig. 8).
“RX” will display on the screen, indicating the radio is in receiving mode. You can hear the call ring
tone or the voice from the other user.
Using earphones (not supplied)
Plug your earphone into the earphone socket, speak into the microphone and press the PTT
key of the earphone.
Fig.4
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Fig.5
Fig.6 6
Fig.8 8
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Function set-up
Selecting a channel
1. Press the / key to select the channel (1-40).
2. When switching to the desired channel number, press the FUNCTION key to confirm.
NOTE: The last channel number can be recalled.
Selecting a sub-code
1. Press the FUNCTION key twice within one second to enter the CTCSS sub-code setting (this will reduce
the incidence of other users sharing the two-way radio communications channel). The screen will
display as illustrated in Fig. 4, page 4. One second later, it will be blinking and show the current subcode
(Fig. 5, page 4).
2. Press the / key to select sub-code 00/01-38.
3. Press the FUNCTION key again one more time to confirm and return to the main screen.
4. If the sub-code is not confirmed after two seconds, the setting will be confirmed automatically and
will return to main the screen.
5. There is no sub-code in Channels 5 and 35 under Australian regulations.
NOTE: • No sub-code is shown on the main screen.
• Channel and sub-code are independently memorised. The last channel and sub-code
will be memorised if the unit is switched off accurately.
• If the channel and sub-code are occupied, a busy indicator “ b ” will be shown on the
screen (Fig. 9). Press any key to return to show the channel. When it is not busy, it will
revert to the normal two-way radio main screen (Fig. 2).
Automatic channel scan
1. Press the / key for two seconds to start the channel scan. The channel number will change, it will
stop scanning when it finds a channel where transmission is taking place.
2. Press the / key again to stop the channel scan.
Auto squelch (SQ)
Auto squelch control eliminates unwanted interference during communication; you do not need to
activate it.
VOX function
VOX is the voice activating transmission function. You can talk and communicate with the
other user without holding the PTT button down.
1. Press and hold the FUNCTION key, then press the / VOX key to activate the VOX function,
the VOX icon shows on the screen (Fig. 10).
2. Repeat the same to exit from VOX mode and close the VOX function.
Monitor function
Activate the monitor function during weak transmission to receive all signals in the same channel.
1. Press and hold the FUNCTION key, then press the CALL/MON key to activate the monitor (MON)
function.
2. Press the same again to exit MON mode.
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Fig.10

Volume level adjustment
1. Press and hold the FUNCTION key, then press the / VOL key to alter the volume level from
“1” to “4” (Fig. 11 shows the volume level).
2. The volume level changes once when the / VOL key is pressed once.
3. Release the / VOL and FUNCTION key to return to normal mode.
Other functions
“Roger beep”
This is the short beep sound you hear at the end of each transmission. You can turn it on or off.
1. Turn off the unit.
2. Press the CALL and FUNCTION key for three seconds to turn on the unit: “ ” or “ ”
shows on the screen (Fig. 12 and Fig. 13).
3. Press the / key to select “Roger Beep” on ( ) or “Roger Beep” off ( ).
4. Press the FUNCTION key for three seconds to confirm the setting and return to normal mode.
Repeater function
Under this function, you can transmit the message to the message transmission station, the signal
will then be retransmitted to the other partner in the same channel and/or sub-code within the
communication range of the repeater station. It enables signal transmission over longer distances.
1. Press and hold the PTT key, then press the key within one second to select the repeater function.
2. or Indicates the current status of the repeater function (on or off, see Fig. 14 and Fig. 15).
Enables the repeater function, the current channel will reset to Channel 1.
Indicates the radio is in repeater mode.
Disables the repeater function.
3. Release the PTT and key to confirm and return to normal mode.
4. The channel number displays “ - , - ” on the screen with the repeater function on,
or it displays “ - ”. (There are eight repeater channels: channels 1 to 8.)
Screen backlight
The screen backlight will stay on for five seconds if any key is pressed.
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Fig.11
Fig.12
Fig.13

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Low battery alert
This symbol displayed on the screen indicates the battery level is low.
This symbol displayed on the screen, together with a beeping sound, indicates the battery level is
low: you must change the battery.
NOTE: The unit will automatically turn off when out of battery.
Charging
The battery icon flashes while charging. It stops flashing when the batteries are fully charged. If the unit
is on while charging, the screen shows the current channel and the unit can receive signals only. The
CALL and PTT key is not available for use.
1. Please charge any rechargeable batteries (not supplied) before first use.
2. Use an AC charger (not supplied) to recharge any rechargeable batteries (not supplied).
3. Supply power: 7.5V / 300mA.
4. To fully charge the battery takes 1-8 hours, depending on how much charge is left in the battery.
Setting memory
The unit will memorise the last setting selected before you turn the radio off and will automatically
resume to it when you turn the radio on again. However, the setting will not be memorised if you turn
off the unit and take out the batteries.
Technical specifications
Description Specifications
Power output 500mW
Operating frequency 476.425 --- 477.400MHz
Channels 40
CTCSS sub-codes 38
Modulation FM
Communication range Unobstructed conditions: up to 3km
Power source 3 x AAA alkaline batteries or Ni-MH AAA 600mAh 1.2V rechargeable
batteries
(Do not mix alkaline and rechargeable batteries in the same unit.)
Battery life 10 hours for AAA batteries (5% transmission, 5% reception, 90% stand-by)
Screen Backlit
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Transmit - receive frequencies (MHz)
CHANNEL FREQUENCY CHANNEL FREQUENCY CHANNEL FREQUENCY
1* 476.425 15 476.775 29 477.125
2* 476.450 16 476.800 30 477.150
3* 476.475 17 476.825 31* 477.175
4* 476.500 18 476.850 32* 477.200
5** 476.525 19 476.875 33* 477.225
6* 476.550 20 476.900 34* 477.250
7* 476.575 21 476.925 35** 477.275
8* 476.600 22• 476.950 36* 477.300
9 476.625 23• 476.975 37* 477.325
10 476.650 24 477.000 38* 477.350
11 476.675 25 477.025 39 477.375
12 476.700 26 477.050 40 477.400
13 476.725 27 477.075
14 476.750 28 477.100
* These channels are repeater access channels.
** Designated emergency channel
• Speech telephony is not permitted on these channels.
Interference eliminator code chart
CODE FREQUENCY
(Hz)
CODE FREQUENCY
(Hz)
CODE FREQUENCY
(Hz)
1 67.0 14 107.2 27 167.9
2 71.9 15 110.9 28 173.8
3 74.4 16 114.8 29 179.9
4 77.0 17 118.8 30 186.2
5 79.7 18 123.0 31 192.8
6 82.5 19 127.3 32 203.5
7 85.4 20 131.8 33 210.7
8 88.5 21 136.5 34 218.1
9 91.5 22 141.3 35 225.7
10 94.8 23 146.2 36 233.6
11 97.4 24 151.4 37 241.8
12 100 25 156.7 38 250.3
13 103.5 26 162.2
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FAQs
Problem Solution
No power - Reposition or replace the batteries.
Message not transmitted
- Make sure the Push-to-Talk (PTT) button is
completely pressed as you transmit.
- Reposition or replace the batteries.
Message not received - Confirm radios have the same channel settings.
- Make sure PTT is not inadvertently being pressed.
- Obstructions operating indoors or in vehicles may
interfere with communication.
- Change your location.
- Check to make sure the volume is loud enough to
be heard.
- Reposition or replace the batteries.
Hearing other conversation or noise on - Shared channel may be in use, try another.
a channel
Limited talk range - Are there any steel/concrete structures between
each other?
- Heavy foliage will decrease the communication
range, check for a clear line of sight.
Transmission - Wearing the radio close to the body such as in a
pocket or on a belt will decrease the talk range,
change the location of the radio.
Heavy static or interference - Radios are too close to each other. Increase your
distance so the radios are at least 5m apart.
- Radios are too far apart. Obstacles interfere with
transmission. The talk range is up to 3.2km in clear,
unobstructed conditions.
After Sales Support TEL: 1300 886 649
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