POFUNG P53U User manual
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
ATTENTION
This is a multi-task GMRS transceiver. Combining the latest technology in radio communication along with a sturdy
mechanical frame, Radio is the ideal and effective solution for the professionals who need to stay in touch with the
working team (in construction sites, buildings, shows, trade fairs or hotels) or for leisure users that just want to keep up
with friends and family.
To help you ward off bodily injury or property loss that may arise from improper operation, please read all the information
carefully before using our products.
Use the two way radio in the environment with the temperature between -10℃~ 40℃, otherwise, it may damage your
two way radio. It can be operating under 2000m.
Long-term high-power channel transmitter, the radio fever is a normal phenomenon, but we do
not recommend you for a long time at high power transmitter, do not use the radios in without
installing an antenna or antenna damaged.
Intended Use
Our products are designed to provide reliable wireless communication services for users across many industry sectors. In
order to use the products safely and to achieve the best performance, they must be used as intended. The operator of the
product is responsible for damage to the product or damage caused by the product if the product was used beyond the
intended use instructions.
Intended use includes that:
•The product is used by users who have full knowledge of its RF exposure and can exercise control over their RF exposure
to meet the occupational limits in FCC/ICNIRP and international standards.
•All the security instructions set forth in this document are always heeded.
•The general, national and in-house safety regulations are heeded.
•The product is exclusively used with the frequencies licensed by the respective authority.
•The product is configured appropriately by the dealer.
Besides, intended use also requires the product operator to be well-trained and to be familiar with the applicable
standards, regulations and provisions.
REGULATORY Information
This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of FCC
Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation.
This equipment generates and can radiate radio frequency energy. If not installed and used in accordance with the
instructions, it may cause harmful interference to radio communications. However, there is no guarantee that interference
will not occur in a particular installation. Verification of harmful interference by this equipment to radio or television
reception can be determined by turning it off and then on. The user is encouraged to try to correct the interference by
one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority
to operate the equipment. This device complies with Part 15 of the FCC Rules.
Operation is subject to the following two conditions:
(1) This device may not cause harmful interference, and
(2) This device must accept any interference received, including interference that may cause undesired operation.
FCC License required for GMRS operation (Only applicable for GMRS radio use in the US)
The radios operate on GMRS frequencies which require an FCC license. You must be licensed prior to operating on
channels 1~16, which comprise the GMRS channels of the radio.
Serious penalties could result from unlicensed used of GMRS channels,in viola-tion of FCC rules,as stipulated in the
communications acts secitions 501 and 502 (amended).
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
You will be issued a call sign by the FCC which should be used for sation identification when operating the radio on GMRS
channels.
You should also cooperate by engaging in permissible transmissions only,avoiding channel interference with orher GMRS
users,and being prudent with the length of your transmission time.
To obtain a license or ask questions about the license application,contact the FCC at 1-88-CALL FCC or go to the fcc
website:http://www.fcc.gov andrequestfom 605.
Important: Any changes or modifications not expressly approved by the party responsible for compliance could void the
user's authority to operate this device. Your radio is set up to transmit a regulated signal on an assigned frequency. It is
against the law to alter or adjust the settings inside the radio to exceed those limitations. Any adjustments to your radio
must be made by qualified technicians.
To be safe and sure:
•Never open your radio’s case.
•Never change or replace anything in your radio except the battery.
Your radio might cause TV or radio interference even when it is operating properly. To determine whether
Your radio is causing the interference, turn it off. If the interference goes away, your radio is causing it.
Try to eliminate the interference by moving your radio away from the receiver. If you cannot eliminate the interference,
the FCC requires that you stop using the radio.
Hazardous Environments: Do not operate the radio in hazardous environments. Explosion or fire may result.
Do not operate the radio near unshielded electrical blasting caps.
Under certain conditions, radios can interfere with blasting operations and may cause an explosion. Turn your radio OFF
to prevent accidental transmission when in a blasting area or in areas posted: "Turn off two-way radio." Construction
crews often use remote control RF devices to set off explosives.
RF EXPOSURE INFORMATION
WARNING! Read this information before using the radio. In August 1996 the Federal Communications Commission (FCC)
of the United States with its action in Report and Order
FCC 96-326 adopted an updated safety standard for human
Exposure to radio frequency electromagnetic energy emitted by FCC regulated transmitters.
Those guidelines are consistent with the safety standard previously set by both U.S. and
International standards bodies. The design of the radio complies with the FCC guidelines and these international
standards.
Never allow children to operate the radio without adult supervision and the knowledge of the following guidelines.
WARNING! It is up to the user to properly operate this radio transmitter to insure safe operation. Please adhere to the
following:
Use only the supplied or an approved antenna.
Unauthorized antennas, modifications, or
Attachments could impair call quality, damage the radio, or result in violation of FCC regulations.
Do not use the radio with a damaged antenna.
If a damaged antenna comes into contact with the skin, a minor burn may result. Please contact your local dealer for a
replacement antenna.
Hand-held Operation (Held-to-Face)
This device was evaluated for typical hand-held (held-toface) operations with a 1 inch spacing from the front of the radio.
For hand-held operation, the radio should be held 1 inch from the user's face inorder to comply with FCC RF exposure
maximum duty cycle 50% requirements. For more information about RF exposure, please visit the FCC web site at
www.fcc.gov.
Body-worn Operation
This device was evaluated for body-worn operations with the supplied belt-clip accessory. (All necessary accessories are
included in the package; any additional or optional accessories are not required for compliance with the guidelines.) Third
party accessories (unless approved by the manufacturer) should be avoided as these might not comply with FCC RF
exposure guidelines(maximum duty cycle 50%).
For more information about RF exposure, please visit the FCC web site at www.fcc.gov.
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
Precautions for Batteries
■Charging Prohibitions
To protect you against any property loss, bodily injury or even death, be sure to observe the following safety instructions:
1. Do not charge or replace your battery in a location containing fuels, chemicals, explosive atmospheres and other
flammable or explosive materials.
2. Do not charge your battery that is wet. Please dry it with a soft and clean cloth prior to charge.
3. Do not charge your battery suffering deformation, leakage and overheat.
4. Do not charge your battery with an unauthorized charger.
5. Do not charge your battery in a location where strong radiation is present.
6. Overcharge shall always be prohibited for it may shorten the life of your battery.
■Maintenance Instructions
To help your battery work normally or prolong its life, be sure to observe the following instructions:
1. Accumulated dust on charging connector may affect normal charging. Please use a clean and dry cloth to wipe it on a
regular basis.
2. It is recommended to charge the battery under 5℃~40℃. Violation of the said limit may cause battery life reduction
or even battery leakage.
3. To charge a battery attached to the product, turn it off to ensure a full charge.
4. Do not remove the battery or unplug the power cord during charging to ensure a smooth charging process.
5. Do not dispose of the battery in fire.
6. Do not expose the battery to direct sunlight for a long time nor place it close to other heating sources.
7. Do not squeeze and penetrate the battery, nor remove its housing.
■Transportation Instructions
1. Damaged batteries must not be transported.
2. To avoid short circuit, separate the battery from metal pars or from each other if two or more batteries are
transported in one packaging.
3. The radio must be switched off and secured against switch-on, if the battery is attached.
The content of the shipment must be declared in the shipping documents and by a Battery Shipping Label on the
packaging. Contact your hauler for the local regulations and further information.
Precautions for Disposal
Once the service life of our products (including but not limited to radios and batteries) has ended，they shall not be
disposed as household garbage. Their recycling and disposal shall satisfy your local regulations.
Care and Safety
Your P54U was designed to fulfill any warranty obligations and to enjoy this product for many years.
As for all the electronically devices, we recommend you to follow this few suggestions:
•Do not attempt to open the unit. Non-expert handling of the unit may damage it and/or annul the warranty.
•When using regulated power supply, take notice of power voltage that must be 5V to avoid damages.
• High temperatures can shorten the life of electronic devices, and warp or melt certain plastics. Do not store the radio in
dusty or dirty areas.
• Keep the Radio dry. Rainwater or damp will corrode electronic circuits.
• If it appears that the Radio diffuses peculiar smell or smoke, please shut off its power immediately and take off the
charger or battery from the Radio.
• To clean the radio, use a soft cloth dampened with water. Do not use cleaners or solvents because they can harm the
body of the unit and leak inside, causing permanent damage.
• Use a dry, lint-free cloth to clean the battery contacts.
Programming software (optional)
Thanks to Pofung Programming software CPS-P53U-FCC, it is possible to increase the performance of your radio or to
reduce its functionality by disabling some of the default features (CTCSS, DCS, TOT, VOX...)
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
For further information, please consult the Programming software manual.
Any attempt to change frequencies or output power of the radio invalidates the approval.
Package Contents
• 1 transceiver • 1 Belt clip
• 1 2800mAh Li-ion rechargeable battery pack • 1 Fast desktop charger
• 1 Wall adaptor • 1 User Manual
•1 Wrist belt
If any item is missing, please notify your pofung dealer.
Main characteristics
• GMRS Transceiver • Output power: Max 5W
• Ultra clear voice • High performance antenna
• Channel spacing: 12.5 KHz • Channel Scan, Scan mode: Time, Carrier, Search
• VOX (voice activated transmit) • Battery saving
• Channels monitor (on channel 16) • Ten (10) levels of Squelch adjustment
• 2pin Kenwood accessory jack • TOT (Time out timer)
• 50 CTCSS tones and 210 DCS codes • Li-Ion 2800mAh battery pack
• Selectable output power: high (5W) or low (0.5W)
Coverage/Range
The maximum range depends on terrain condition and is obtained during use in an open space. The only limitation to
maximum possible range are environmental factors such as blockage caused by trees, buildings, or other obstructions.
Inside a car or a metallic constructions, the range can be reduced. Normally the coverage in the city, with buildings or
other obstructions is about 1 or 2 Km. In open space but with obstructions like trees, leaves or houses the maximum
possible range is about 4-8 Km. In open space, without obstructions and in sight, like for example in mountain, the
coverage can be more than 12Km.
Battery recharge
Charging the Battery Pack
The Li-ion battery pack is not charged at the factory; please charge it before use. Charging the battery pack for the first
time after purchase or extended storage (more than 2 months) may not bring the battery pack to its normal maximum
operating capacity. Best operation will require fully charging/ discharging the battery two or three times before the
operating capacity will reach its best performance. The battery pack life may be depleted when it’s operating time
decreases even though it has been fully and correctly charged. If this is the case, replace the battery pack.
Charger Supplied
Please use the specified charger provided by Pofung. Other models may cause explosion and personal injury. After
installing the battery pack, and if the radio displays low battery with a voice prompt, please charge the battery.
Use Caution with the Li-ion Battery
a. Do not short the battery terminals or throw the battery into a fire. Never attempt to remove the casing from the battery
pack, as Pofung cannot be held responsible for any accident caused by modifying the battery.
b. The ambient temperature should be between 5℃-40℃(40˚F - 105˚F) while charging the battery. Charging outside this
range may not fully charge the battery.
c. Please turn off the radio before inserting it into the charger. It may otherwise interfere with correct charging.
d. To avoid interfering with the charging cycle, please do not cut off the power or remove the battery during charging until
the green light is on.
e. Do not recharge the battery pack if it is fully charged. This may shorten the life of the battery pack or damage the
battery pack.
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
f. Do not charge the battery or the radio if it is damp. Dry it before charging to avoid damage.
WARNING！
When keys, ornamental chain or other electric metals contact the battery terminal, the battery may become damage or
injure a human. If the battery terminals are short circuited it will generate a lot of heat. Take care when carrying and
using the battery. Remember to put the battery or radio into an insulated container. Do not put it into a metal
container.
How to Charge
a. Plug the AC adaptor into the AC outlet, and then plug the cable of the AC adaptor into the DC jack located on the back
of the charger. The indicator light blinks orange and is then ready to charge a battery.
b. Plug the battery or the radio into the charger. Make sure the battery terminals are good in contact with charging
terminals. The indicator light turns to red--- charging begins.
c. It takes approximately 2-5 hours to fully charge the battery. When the lamp lights green, the charging is completed.
Remove the battery or the radio unit with its battery from socket.
When charging a radio (with battery) the indicating lamp will not turn into green to show the fully charged status if the
radio is powered on. Only when the radio is switched off will the lamp indicate normal operation. The radio consumes
energy when it is power-on, and the charger cannot detect the correct battery voltage when the battery has been fully
charged. So the charger will charge the battery in constant voltage mode and fail to indicate correctly when the battery
has been fully charged.
LED Indicator
STATUS
LED
No Battery
Green and red alternately flashing
Charge Normally
Red
Fully Charged
Green
Trouble
Red blinks fast for a long time
NOTE：Trouble means battery too warm, battery short-circuited or charger short-circuited.
Installation of accessories
Before the radio is ready for use we need to attach the antenna and battery pack, as well as charge the battery.
Installing the belt clip
a. At the back of the radio there are two parallel screws mounted above the battery, remove these and thread them
through the holes on the belt clip as you screw them back into the radio body.
b. Removing the Belt Clip: Unscrew counter-clockwise to remove the belt clip.
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
Installing the battery pack
Before attaching or removing the battery make sure your radio is turned off by turning the power/volume knob all the way
counter-clockwise.
a. Make sure the battery is aligned in parallel with the radio body with the lower edge of the battery about 1-2cm below
the edge of the radio.
b. Once aligned with the guide-rails, slide the battery upward until you hear a click as the battery locks in place.
Remove the battery pack
To remove the battery, press the battery release above the battery pack, as you slide the battery downward.
Installing the Additional Speaker/Microphone (Optional)
Pry open the rubber MIC-Headset jack cover and then insert the Speaker / Microphone plug into the double jack.
Main controls and parts of the radio
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
1. Antenna
2. Encoder: rotate clockwise or counter-clockwise to select the desired channel
3. Power/volume knob-turn clockwise to power on and increase the volume level.
Turn counter-clockwise to decrease the volume level and power off.
4. Speaker
5. Built-in microphone
6. Led indicator: RED: TX; GREEN: RX.
7. PTT: push this button to transmit, release it to receive.
8. Side key 1: hold down this button to activate the Monitor function.
9. External Speaker/Mic Jack- allows the connection with external devices such as headsets, microphones.
10. Battery release latch.
11. 2800mAh Li-Ion battery pack.
12. Micro USB charging port
Operations
Power on/off and volume adjustment
Rotate the Power/Volume knob clockwise to turn the radio on. Rotate the control clockwise /counter-clockwise to adjust
the volume level as you prefer. To turn the radio off, rotate the control counter-clockwise till hearing a mechanical “click”.
Transmission
To communicate, all radios in your group must be set to the same channel. Briefly press the Side key 1 to enable the
Monitor feature in order to make sure that the frequency is not busy, and then press the PTT key. Release the PTT key to
receive. Only one user at a time can talk during radio communications. Therefore, it is important not to transmit when you
are receiving a communication and use the transmission mode sparingly to allow other users to talk. Transmission
consumes a significant amount of energy and should therefore be used sparingly to prolong the battery life. If you are
unable to contact a station that you have no problems in receiving, the station may be using CTCSS tones or DCS codes.
Monitor
The Monitor feature is for excluding (opening) the Squelch, in order to listen to signals that are too weak to keep the
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
Squelch permanently opened. Hold down the Side key 1 to enable such function.
Scan
This function can be activated only by means of the optional programming software. To enable the Scan function, all 16
channels must be programmed. If you turn on the radio on channel 16, the scanning will automatically start. Whenever
any signal is detected, the scanning will stop on a busy channel. If the PTT is pressed, you will transmit on the latest busy
channel. Channel 16 is the priority channel; therefore if you don’t pick up any signal when you press PTT, the radio will
transmit on channel 16.
FM Radio (FM)
The frequency range for listening to the radio is 88-108MHz.
Press and hold the Side key 1 to turn on the radio, and then use the Side key 1 to search for radio stations automatically.
Press the PTT key or turn off the radio to exit the FM radio.
English/Chinese language switch
On the 15th channel, press and hold the PTT + Side Key 1 to turn on the radio and switch the prompt language between
Chinese and English.
Squelch
The Squelch function suppresses noises on free channels and allows receiving even weak signals. P54U has 10 different
Squelch levels that can be set by programming software: 0 means that the Squelch is turned off; from level 1 to level 9 you
will have different levels of noise reduction. The higher is the level, the louder will be the Squelch. By default, the Squelch
level of P54U is set on level 4. Make sure you do not set an excessively high squelch level because in this case you may not
be able to receive weaker signals. On the other hand an excessively low Squelch value could enable the Squelch even
when no signals are present. Squelch must always be adjusted when no signals are present. The Time Out timer is settable
from 30 sec to 270 sec. only through the programming software. This feature is disabled by default.
CTCSS/DCS tones
CTCSS and DCS tones are similar to access codes and enable the radio to communicate only with the users that are tuned
on the same channel and have set the same code. For each channel, you can set up to 50 CTCSS tones and 210 DCS codes.
The CTCSS/DCS tones are a sort of “access codes” and enable the radio to communicate only with the other users set on
the same frequency and on the same CTCSS/DCS tone. Undesired signals coming from other stations set on the same
frequency but with different CTCSS/DCS tones won’t be received.
VOX
The VOX feature enables hands free conversations without using PTT: just speak in the direction of the microphone and
the communication will be automatically activated.
On channels 1, press and hold the PTT + Side Key 1 key to turn on the radio and turn the VOX function on or off.
Accompanied by a voice prompt VOX ON or VOX OFF.
The VOX sensitivity can be adjusted in 5 different levels (1…9) through the programming software:
Level 2 is set by default and has the lowest VOX sensitivity, 9 is the lowest one.
With the programming software you can enable/disable the VOX feature and select the sensitivity levels.
On-line service and support
The Pofung website provides additional information about obtaining service or support for the Pofung line of two-way
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
FCC Licensing Information This pofung radio operates on Commercial/ Land Mobile frequencies which require a license
from the Federal Communications Commission (FCC) for business, personal, education and recreational use. To obtain
forms, call the FCC forms hotline at: 1-800-418-3676 or go to http://www.fcc.gov For questions concerning commercial
licensing, contact the FCC at 1-888CALL-FCC (1-888-225-5322).
Appendix A. –Trouble shooting guide
Phenomena
Analysis
Solution
You cannot turn on the radio.
The battery may be installed improperly.
Remove and reattach the battery.
The battery power may run out.
Recharge or replace the battery.
The battery may suffer from poor contact caused by
dirty or damaged battery contacts.
Clean the battery contacts or replace the
battery.
During receiving, the voice is weak
or intermittent.
The battery voltage maybe low.
Recharge or replace the battery.
The volume level may be low.
Increase the volume.
The antenna maybe loose or maybe installed
incorrectly.
Turnoff the radio, and then remove and
reattach the antenna.
The speaker maybe blocked.
Clean the surface of the speaker.
You cannot communicate with
other group members.
The frequency or signaling type maybe inconsistent
with that of other members.
Verify that your TX/RX frequency and
signaling type are correct.
You may be too far away from other members.
Move towards other members.
You hear unknown voices or noise.
You may be interrupted by radios using the same
frequency.
Change the frequency, or adjust the squelch
level.
The radio in analog mode maybe set with no
signaling.
Request your dealer to set signaling for the
current channel to avoid interference
You are unable to hear anyone
because of too much noise and hiss.
You may be too far away from other members.
Move towards other members.
You may be in an unfavorable position. For
example, your communication may be blocked by
high buildings or blocked in an underground area.
Move to an open and flat area, restart the
radio, and try again.
It may be the result of external disturbance (such as
electromagnetic interference).
Stay away from equipment that may cause
interference.
The radio keeps transmitting.
VOX may be turned on or the headset is not
installed in place
Turn off the VOX function. Check that the
headphones are in place.
You cannot use the keys.
The keypad may not work temporarily.
Restart the radio.
NOTE: If the above solutions cannot fix your problems, or you may have some other queries, please contact your dealer
for more technical support.
Appendix B. –Technical Specifications
General Part
Frequency Range GMRS 462.5500 to 467.7250MHz
Working temperature -10℃to +40℃
Operation Voltage DC 7.4 V ±10%
Operation Mode Simplex
Dimensions 138mm×60mm×39mm (without Antenna)
Weight 263g (Battery pack included)
Antenna Impedance 50ohm
Duty cycle 5/5/90%
Category B
Transmitter Part
RF Output Power GMRS ≤5 W
Spurious Emission -36dBm＜1GHz，-30dBm＞1GHz
Adjacent Channel Power 60dB @ 12.5KHz
Transmission current ≤1500mA
Receiver Part
Receive Sensitivity 0.25μV (12dB SINAD)
User Manual（FCC Version Draft）
This manual is applicable to the following product:
P53U,BF-1903,P53UH,P53UL,P53X，P54U,BF-1904,P54UM,P54G,P54X
Rated Audio Power Output 1W @16 ohms
Receive current ≤380mA
Rated Audio Distortion ≤5%
NOTE: All specifications may be modified without prior notice or liability.
Appendix C. - GMRS Frequency Chart (MHz)
CH.No
CH.Freq.
GMRS No.
CH.Freq.
CH.Freq.
GMRS No.
1
462.5625
1
11
462.6250
18
2
462.5875
2
12
462.6500
19
3
462.6125
3
13
462.6750
20
4
462.6375
4
14
462.7000
21
5
462.6625
5
15
462.7250
22
6
462.6875
6
16
467.6500
27
7
462.7125
7
8
462.5500
15
9
462.5750
16
10
462.6000
17
Disclaimer
The accuracy and completeness of the contents are sought in the process of compilation, but we do not bear any
responsibility for the possible errors or omissions. With the continuous development of technology, we reserve the right
to change the design and specification of the product without notice. No copy, modification, translation and dissemination
of this handbook may be made in any form without the prior written authorization of our department.
PO FUNG ELECTRONIC(HK) INTERNATIOANL GROUP COMPANY
Address: 3/F FULOK BLDG 131-133 WING LOK ST SHEUNG WAN, Hong Kong
Telphone: +86-595-86752889
Fax: +86-595-86754889
Mail: sales @pofung.cn
Http://www.pofung.cn
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