UHF B07RFKB76C Professional Wireless Microphone User Manual
- June 5, 2024
- UHF
Table of Contents
B07RFKB76C Professional Wireless Microphone
User Manual
Auto-channel-selecting infrared function
Professional wireless microphone with optional multi-channel
Warning: be careful not to get electric shock or fire, the body must be
kept away from rain or wet environment!!!
Attention
Note: do not open the body without permission.
Any related operation is only allowed to be performed by service personnel.
Indicates that the instructions must be strictly followed by symbols
indicating operation
- Read the operating instructions – please read all the safety and operating instructions carefully before using the machine.
- Keep operating instructions – please keep all safety and operating instructions for future reference.
- Attention to warnings – please pay attention to warnings in all applications and operations of the machine.
- Follow – please follow all operations and use the instructions of the machine.
- Add-ons – only add-ons recommended by the manufacturer of the machine are allowed to avoid accidents.
- Rain and humidity – keep away from water when using the machine.
- The use and storage of the ventilator shall have good ventilation conditions, and the minimum clearance around the equipment shall be more than 5cm.
- Heat source – keep away from heat sources, including the radiator, heater, furnace, etc.
- Power supply -use the power supply volts indicated on the body.
- Exposed flame sources, such as lighted candles, shall not be placed on the equipment.
- Do not litter the battery when it is discarded. Please put it into the designated recycling bucket.
- Do not place any liquid objects or heavy objects on the equipment, and do not allow water drops or splashes.
- The equipment can be used in tropical or temperate zones.
Do not use it in the above environment, non professionals are not allowed to dismantle the system at will!
Product introduction
The system consists of a wireless receiver, a hand-held wireless transmitter microphone, and a portable Bodypack transmitter. The wireless microphone system suitable for professional stage singing adopts UHF transmission, CPU control, chip integration technology, infrared signal transmission to achieve frequency consistency, noise detection, and other technologies, which has the advantages of easy operation.
Installation introduction
1. Receiver
Receiver 01: 
Receiver02: 
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Power ON/OFF switch: press the switch 0.5 second, can turn on the receive] press the switch 3 seconds, can turn off the receiver.
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IR window: press the function button to adjust the frequency
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LCD display: show the frequency, receive channel, audio signal, and signal level.
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Function button (SET): short press to adjust the frequency, press the button for 3 seconds can change the receive channel, and adjust the volume.
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UP button: this button is used to increase the channel number or volume +.
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DOWN button: this button is used to decrease the channel number or volume –
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Antennal.
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CH-1 Balanced Output
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CH-2 Balanced Output
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Unbalanced Microphone Output: this is a mixed unbalanced microphone output from Channel 1 to Channel 8.
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DC input: DC12V/ IA
2. Hand-held transmitter:
3. Body-pack
transmitter
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Microphone head
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Power ON/OFF switch
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Power indicator
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IR window
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Battery compartment: 1.5V *2
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The battery cover
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Power ON/OFF switch
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Microphone Input
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Volume Control: increase or decrease the volume
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Antenna
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Frequency LED indicator. Low battery power indicator
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Power LED indicator
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IR window
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Battery compartment: 1.5V” 2
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Battery cover
System installation and operation instructions
3-1 Install and Set-Up
- Connect the A+B antenna
- Connect the power supply: operate only on AC110\7- or AC220V-
- Connect the outputs of the receiver to the microphone inputs of a mixer or a sound system, you could use XLR balanced cable or 6.3mm unbalanced cable. ( Picture 1)
- Place the receiver at a location at least 1 meter away from the ground and all the walls. Also, keep the receiver away from any large metal surface as far as possible. (Picture 2)
- Volume control of the sound system is set to a minimum, turn on the system and the receiver, then turn on the transmitter. If the frequency of the receiver is the same as the transmitter, the signal indicator “T’of the receiver will be light up; if the frequency does not match, please set up the frequency, refer 4-2.
- Adjust the volume of the receiver and sound system to appropriate. When howling, turn down the volume or move the transmitter away from the speaker.
3-2 Receiver set up
- Turn on the receiver: press the power button, and the LCD of the receiver will be lighted up.
- Set up the frequency: press the function button (SET) in 3 seconds and the LCD will flash, press the ” UP ” or “DOWN” button to adjust the frequency. When you confirm the frequency, press the “SET” button twice, then save and quit.
- Adjust the volume: press the function button (SET) in 3 seconds, and the LCD will be flashed, press the “SET” button again, and the LCD will be flashed and show V12, press the ” UP ” or “DOWN” button to adjust the volume, then press the ” SET” button to save and quit(P12).
- Automatically search the frequency: press the ” UP” or “DOWN” button to automatically search the frequency, and the system will be avoided the interference frequencies.
When the full screen is on, as shown in the figure below:
3-3 Transmitter set up:
Refer to picture 16, the transmitter face to the IR window of the receiver,
the ideal distance is 10cm, press the “SET” button, and the system will be
auto-enter the match state, when the transmitter receives the correct signal,
the RE indicator will be lighted up, the IR signal of the receiver will be
quit. 
Failure and maintenance
Trouble removal
The following table lists some common faults and solutions: if you can’t
remove the faults, please contact your dealer.
| Question | Solution |
|---|---|
| No sound : (status: RF indicator of the receiver is not on) | l. Check whether |
the power switch of the transmitter is on; The receiver IS on
2. Check whether the positive and negative polarity of the battery is
disordered.
3. Check the antenna connection of the receiver.
4. Ensure that there is no obstruction between the antenna and the
transmitter.
No sound: (status: RF indicates normal, AF indicates normal)| 1. Check that
the volume knob of the receiver is in the minimum position.
2. Check whether the connection between the audio output of the receiver and
the loudspeaker is correct.
No sound: (status: RF indicates normal, AF indicates abnormal)| 1. Check that
the transmitter power is on.
2. If necessary, change the pickup head of the transmitter.
Turn on the power of the transmitter, and the receiver receives the signal
with noise or external noise interference| 1. Check that the battery is
installed securely.
2. Eliminate sources. nearby RF interference
3. If using a guitar or other instrument, check for poor connections.
4. Two transmitters may use the same frequency. Find and close one of them.
5. The signal may be too weak. Readjust the position of the antenna to be as
close to the transmitter as possible.
6. Change other channels.
When the transmitter is closed, there is noise in the receiver| 1. Remove the
RF noise source.
2. Readjust the receiver or antenna position.
The sound is lost accidentally during the movement of the transmitter
performance venue| 1. Place the receiver. again, and carry out the “walk”
test to observe the RF indication status.
2. If any sound is lost, mark this point and avoid going here during the
performance.
---|---
Unable to turn on the transmitter| Replace transmitter battery
Appendix: Description of system accessories
The system is packaged with the following accessories:
- One audio signal line
- One AC power adapter
- Four 1. 5v batteries
- User manual 1
This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions:
- This device may not cause harmful interference, and
- This device must accept any interference received, including interference that may cause undesired operation
NOTE: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to Part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation. This equipment generates, uses,
and can radiate radio frequency energy and, if not installed and used in
accordance with the instructions, may cause harmful interference to radio
communications. However, there is no guarantee that interference will not
occur in a particular installation.
If this equipment does cause harmful interference to radio or television
reception, which can be determined by turning the equipment off and 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.
Warning: Changes or modifications not expressly approved by the party
responsible for compliance could void the user’s authority to operate the
equipment
The device has been evaluated to meet general RF exposure requirements the
device can be used in portable exposure conditions with restriction.