BelFone BF-TD300 User manual

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TD300
Service Manual

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Notice to the user
Government law prohibits the operation of unlicensed radio transmitters within
the territories under government control.
Illegal operation is punishable by fine or imprisonment or both.
THANK YOU
We are grateful you choose BelFone series professional radio
communications products!
Since 1989, BelFone has been always engaging in research and exploration of
radio communications technologies, In order to lead intelligent technologies in
the industry. We still make every effort to research and design products
according to modern complicated communications environment, and we offer
complete and customized communication solutions to clients. Our products will
satisfy you because of its excellent performance and outstanding
communications strength. No matter what field you are in. You will be Satisfied
with the radio.
VHF/UHF digital FM transceiver model: BF-TD300
Warning！
◆In explosive atmospheres(inflammable gas, dust particles, much powder
area，etc.),Please turn the power off.

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Precautions
It’s important that the operator is aware of and understands hazards common
to the operation of any radio .Please observe the following safety precautions
to prevent radio damage or personal injury. The following precautions shall be
observed during operation, service and repair of this radio.
◆The recommended usage rate is 1 minute for TX and 4 minutes for RX,
when the radio is used for transmission for many hours continuously, the
radiator and chassis will become hot, allow the rear panel of the radio to
contact surface of low melting point /low Ignition point object;
◆Don’t leave the transceiver in direct sunlight for a long time, don’t place the
transceiver on extremely heat, damp, dusty area, and don’t put it on unstable
surfaces;
◆When restriction or warnings are posted regarding the use of radio devices,
please obey the regulation turn the transceiver power off;
◆Use of the radio while you are driving may be against traffic laws, please
prohibit using it ;
◆If you notice any problems on the radio, please turn off at first. Then contact
with local dealer. Do not modify this radio unless instructed by this manual or
refer service to a qualified licensed or certified technician only;
◆If you want to use the machine for secondary development, please contact
with BelFone’s technical engineer or dealer for technical assistance;
◆Please keep the surface of radio is clean and dry, clean the radio using a
cloth moistened with clean water and a mild dishwashing liquid.

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Content
Supplied Accessories.........................................................................................................................5
Installation of Accessories ................................................................................................................6
Getting Acquainted .........................................................................................................................12
Basic Operation...............................................................................................................................13
Turning the power on /off .......................................................................................................13
Adjusting the volume..............................................................................................................13
Selecting a Channel.................................................................................................................13
Selecting a Zone......................................................................................................................14
Dual Modes Switching............................................................................................................14
Call..........................................................................................................................................15
Receiving and responding to a call .........................................................................................16
Button Setting .........................................................................................................................16
Functions and Operations................................................................................................................18
Scan.........................................................................................................................................18
Auto Scan................................................................................................................................19
Monitor and Permanent Monitor.............................................................................................20
Message...................................................................................................................................20
One Touch Call .......................................................................................................................20
Talk Around.............................................................................................................................22
TX Power................................................................................................................................22
Bandwidth...............................................................................................................................23
Squelch Level..........................................................................................................................23
Emergency ..............................................................................................................................23
Time Out Timer (TOT) ...........................................................................................................25
Voice Encryption.....................................................................................................................25
VOX........................................................................................................................................26
Warning Tones.........................................................................................................................26
Reject Stranger Call................................................................................................................27
TX Permission.........................................................................................................................27
Battery Saver...........................................................................................................................28
Lowery Battery Alert ..............................................................................................................29
CTCSS/CDCSS.......................................................................................................................29
PC Mode .........................................................................................................................................30
CTCSS Standard Frequency Table..................................................................................................31
CDCSS Standard Code Table..........................................................................................................31
Circuit Description..........................................................................................................................33
PC Board -Top layer .......................................................................................................................52
PC Board -Bot layer.....................................................................................................................53
Schematic Diagram.........................................................................................................................54
Block Diagram................................................................................................................................54
Specifications..................................................................................................................................55
Statement.........................................................................................................................................56

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Supplied Accessories
Notes: The accessories listed below are covered by BelFone dealer、authorized
BelFone agents or factories .
After carefully unpacking the transceiver, identify the items listed in the
table below. If any items are missing or have been damaged during shipment
please contact with dealer immediately.
Accessories
Items Quantity
Antenna 1
Strap 1
Belt Clip 1
Charger 1
Li-ion Battery 1
User Manual 1
Warranty Card 1
Certificate 1
Antenna Strap Belt Clip
Charger Li-ion Battery

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Installation of Accessories
Installation/ removing the antenna
Hold the supplied antenna by its base, then screw it into the connector on the
top panel of the radio until fasten.
Turn the antenna anti-clockwise to remove it.
Installation/ removing the belt clip
Install the belt clip along the groove till a "click" sounds and the belt clip is
locked into the groove.

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Attaching/Removing the Strap
Thread the hand strap to the loop back of your two-way radio.
Attaching/Removing the Battery

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Match the guides of the battery with the corresponding grooves on the bottom
rear of the radio, then press the battery until a click is heard to lock it in place.
To remove the battery, please turn the power off then press the release latch
to unlock the battery pull the battery away from the radio.
Note: Don’t attach / remove the battery if the transceiver turned on.
Warning！
1. Don’t short-circuit the battery, it may cause the battery damaged or
burst into flame;
2. Never attempt to remove the casing from battery, that avoid to short
the battery terminal;
3. Battery is flammable objects, don’t throw it into fire or don’t use it on
dangerous area.

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Battery Information
New battery is shipped not fully charged from the factory, please charge your
battery before using it, charging a new battery for 5 hours before initial use.
The maximum battery capacity and performance is achieved after three full
charge/discharge cycles. If you notice the battery power runs lows, please
recharge the battery.
Applicable Battery
To reduce the risk of injury, please only use the battery and charger specified
by Belfone, other batteries may burst, causing bodily injury and property
damage.
Battery Tips
1. When charging your battery, keep it at a temperature among 5℃—40℃.
Temperature out of the limit may cause battery leakage or damage.
2. When charging a battery attached to a radio, turn the radio off to ensure a
full charge.
3. Do not cut off the power supply or remove the battery when charging a
battery.
4. Never charge a battery that is wet, please dry it with soft cloth prior to
charge.
5. Even if the battery is full charged, the operating time is noticeably shorter
than normal performance; it is time to buy a new battery.
To Prolong Battery Life
1. Battery performance will be greatly decreased at a temperature below 0℃,
a spare battery is necessary in cold weather, the cold battery unable to
work in this situation may work under room temperature, so keep it for later

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use.
2. The dust on the battery contact may cause battery breakdown, please use
a clean dry cloth to wipe it before attaching the battery to the radio.
Battery Storage
1. Fully charge a battery before you store it for a long time, to avoid battery
damage due to over-discharge.
2. Recharge a battery after several months’ storage, to avoid battery capacity
reduction due to over-discharge.(NI-MH batteries:3 months, Li-Ion&
Li-polymer batteries: 6 months)
3. Store your battery in a cool, dry place under room temperature, to reduce
self-discharge.
Charging the battery
Use only the charger specified by the manufacturer, the charge indicator
indicates the charging progress.
Charger Status Charger Indicator
Standby(No-load) Charge Indicator does not light
Battery is charging Charge Indicator glows red
Battery is fully charged Charge Indicator glows green
Charge Steps:
1. Plug the AC connector of the switching power into the AC outlet socket.
2. Place the battery or the radio is attached with a battery in the charger.
3. Making sure the battery is connected to the charger, the charging process
initiates when the charger indicator glows red.

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4. The charger indicator glows green when the battery is fully charged, please
remove the battery then.
Note: While charging the temperature out of the limit the LED indicator of charger will not
light; if battery has damaged or battery is not connected to the charger correctly,
The LED indicator of charger also will not light.
Attaching the Speaker/Microphone
Open the accessory port cover, then align the plug with the accessory port and
tighten the screw on the plug.

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Getting Acquainted
①Channel Selector Knob
Turn the knob to select channel 1-16.
②Power switch/volume adjust keys
Turn clockwise to switch the radio power on, when the radio is turned on,
rotate clockwise to increased volume, counter- clockwise to decrease the
volume. Turn counterclockwise fully to switch the radio off.
③LED Indicator
When transmitting LED glows red, when receiving LED glows green;when
scanning LED flashes red; when battery in low power LED flashes red.
④Speaker
⑤MIC
⑥PTT key
Press and hold down the PTT key then speak into the microphone to
transmit.
⑦Button 1

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Press to activate the programmable function. (The detailed consult to basic
operation)
⑧Button 2
Press to activate the programmable function. (The detailed consult to basic
operation)
⑨MIC-SP Jack
Connect to optional speaker/MIC and programming cable.
Basic Operation
Turning the power on /off
Rotate the power switch/volume adjusting keys clockwise to turn the power on.
Rotate the power switch/volume adjusting keys anti-clockwise to turn the
power off.
Adjusting the volume
After the radio is power on, you can rotate the power switch/volume adjust
keys to adjust the volume level, rotate the knob clockwise to increase the
volume, or rotate the knob anti-clockwise to decrease the volume.
Selecting a Channel
Turn the channel selector knob to select channel 1 to 16, rotate the knob

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clockwise to increase the channel number, or rotate the knob anti-clockwise to
decrease the channel number.
Note: If a channel is not programmed, LED indicator flash red and a prompt tone " no
channel “sounds..
Selecting a Zone
The radio supports up to 2 zones, each with a maximum of 16 channels. You
may select a desire zone by setting zone selection function to orange button,
button 1 or button 2, then handover zone. While enable all tone alert, select
zone will hear a channel number. For example: the current works in area 1,
press the zone selection button, the prompt tone sounds "area 2".
Dual Modes Switching
If current channel mode is D/A compatible, press side button【AD Switch】
function to switch the channel mode. The current channel mode is digital
compatible analog , press 【AD Switch】button to switch to analog compatible
digital mode; the current channel mode is analog compatible digital, press
【AD Switch】button to switch to digital compatible analog mode..
Note: AD Switch function only switching the channel mode temporarily, while you restart
the radio or rotate channel selector knob, the current channel will resume to default mode.

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Call
Each digital channel may preset a contact, the preset contact could be a
private call contact, a group call contact or an all call contact; on analog
channel press and hold down the PTT key to transmit. On digital compatible
analog channel press PTT key, if is not within hang time to transmit analog call,
within the preset time period to call back; On analog compatible digital channel
press PTT key, if is not within hang time to transmit digital call, within the
preset time period to call back;
To transmit press and hold down the PTT key, LED indication glows red, speak
into the microphone, hold the palm microphone approximately 3 to 4
centimeters away from your mouth.
1.) Group Call
If you want to transmit a group call, the radio must be set with group call
contact and preset a group call contact for current digital channel, press PTT
key to transmit a group call. Or you can set the One Touch Call key as group
call feature, then press programmed key to transmit a group call. Release PTT
key to receive.
2.) Private Call
If you want to transmit a private call, the radio must be set with private call
contact and preset a private call contact for current digital channel, press PTT
key to transmit a private call. Or you can set the One Touch Call key as private

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call feature, then press programmed key to transmit a private call. If the feature
“private call ACK” is enabled, to transmit a private call need to confirm whether
it is power on or activate on the current channel , while private call is failed, a
low-pitched tone sounds. Release PTT key to receive.
3.) All Call
If you preset an all call contact for current digital channel. Press PTT key to
transmit an all call; Release PTT key to receive.
Receiving and responding to a call
When receiving a call, the LED indicator glows green. On digital channel, while
a private call is received, you may press the PTT key within the preset time
period to call back; on digital compatible analog channel or analog compatible
digital channel, the radio detects both the digital signal and the analog signal
(must have a subsonic) when receiving, and locks the corresponding channel
mode when a matching signal is detected, you may press the PTT key within
the preset time period to call back.
Button Setting
For enhanced convenience, you may program the keys button1, button2, short
and Long press of a key can be assigned with different functions.
Programmable keys are including functions listed below.
●Unassigned：The key is not assigned with any function.

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●One Touch Call 1~6： Allow user to initiate digital group call, digital private
call, or send preset message or send call alert via the one touch call function.
When sending SMS or call alert, press the key to complete the corresponding
function immediately. When sending a call, press the PTT key within 5
seconds after pressing the key.
●Emergency on/off: Allow user to make an emergency call.
●Monitor： Enable monitor function.
●Scan on/off: Allow user to enable or disable the scan function.
●All alert tone on/off: Allow user to enable or disable all alert tones.
●Battery Indication：It’s convenient to know battery capacity. If battery strength
level is 70%-100%, a “Power High “sounds; if battery strength level is
30%-70%, a “Power Middle” sounds; if battery strength level is 15%-30%, a”
Power Low “sound.
Note: If the battery gets lower, a “Please Charger” tone will sound, at the time press
programmed” Battery Indicator” key, you can’t hear battery capacity indication sound.
●Zone Toggle: Allow user to change zones, if the radio contains 2 zones,
press programmed button will be a zone number sounds. If the radio only add
a zone, this feature is useless.
●AD Switch :To temporarily switch channel mode to AD or DA on digital
analog compatible channel
●High/Low Power: User can switch the Tx power level between high and low
power by pressing the programmed High/Lower Power key.

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●Repeater/talk around：Allow radio set to connect through repeater or achieve
standalone communication in talk around mode.
●Vox on/off: If set vox level as 1 to 9 via programming software, press the
programmed VOX on/off key to enable or disable the VOX feature. Press to
activate the VOX feature a VOX on sounds; disable the VOX feature a VOX off
sounds.
Note: Plug the dedicated earpiece into the accessory jack of the radio, the VOX feature is
effective.
●Nuisance Delete: While scanning on, If you don’t want to receive activities on
the channel, press the programmed Nuisance Delete key to remove the
channel from the scan list temporarily. When restart scanning, the nuisance
channel will return to scan list.
●Permanent Monitor: Permanent monitor feature is the same as monitor, but
permanent monitor feature only can be set as long press key. And you should
long press the programmed Permanent Monitor key to exit this feature.
Functions and Operations
Scan
Scan is useful for monitoring signals on the radio channels, the channels
include in the scan list. While scanning, the radio checks for a signal on each
channel and only stops on a channel if a signal is present. Press programmed

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Scan on/off key to begin scanning, while scanning on, a “scan on” sounds,
LED indicator flash red. While scanning off, a “scan off” sounds
Via programmable software to set it: Scan folder( Scan hang time) → A
desired scan list → add available channel to members channel → a digital or
analog channel to select scan list
●Scan Hang Time : When a signal is detected on a channel, scan pauses on
that channel, the radio will remain on the busy channel until the signal is no
longer present. When the signal “ drop out” the radio will remain on the
channel momentarily before scan resumes. The delay time is programmed 500
to 10000 milliseconds.
●Talkback : When a signal is detected on a channel, scan pauses on that
channel, press PTT key can talk back on the channel if enable “Talk Back’
feature; if “Talk Back” isn’t checked, press PTT key may talk back on the
designated channel.
●TX Designated Channel : During scanning, Press PTT key will transmit on
TX designated channel. You can set TX Designated Channel as Last Active
Channel, Selected channel or a desired channel from scan list.
Auto Scan
If Auto Scan feature is enabled for a channel, the radio will automatically enter
scan mode when it is switched to this channel. To stop scanning, press

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programmed Scan On/Off key or switch to other channels. If return to the
channel will enter scan mode directly.
Monitor and Permanent Monitor
Monitor: On analog or digital channel, enable the Monitor feature to monitor
current channel activities and receive weak signals. Press the programmed
Monitor key to activate the monitor function, if a signal is detected, until the
signal is no longer present the radio will exit monitor mode.
Permanent Monitor: Permanent monitor feature is the same as monitor, but
long press the Permanent Monitor key to enter monitor mode, the radio will
remain on monitor mode until long press it again to exit.
Message
On digital channel and digital mode compatible channel, you can send preset
messages by programmed one touch call key. Edit message text via
programming software, the message list save up to 10 entries, and each of a
message contains 140 characters at most.
One Touch Call
On digital channel and digital mode compatible channel, one touch call feature
contains: to send messages or transmit to a group call contact, to send
messages or send call alert and transmit to a private call contact.
●Group Call