One: Introduction
KCX_2.4G002 is a high-quality stereo audio transmitter that works in the 2.4G ISM band. It transmits audio transmission streams up to 16Bit, 44.1KSPS, and the radio frequency air rate is up to 5Mbps, ensuring high fidelity in the audio transmission process. This module adopts technologies such as adaptive frequency hopping, forward error correction, buffering and retransmission to ensure the reliability of wireless transmission. The adaptive frequency hopping mechanism can effectively avoid WiFi and Bluetooth signals automatically, and can communicate with Bluetooth and WiFi. Work in one area. Just insert this module into your product, you can upgrade ordinary wired audio products to wireless audio products.
Two: Features and advantages
1: Uncompressed audio transmission with ultra-CD sound quality
2: Excellent durability and coexistence
3: Through a variety of technologies to ensure the stability of wireless transmission
√ √ Adaptive frequency hopping
√ Forward error correction
√ Buffering and retransmission
4: Intuitive LED indication and status port
5: Convenient and easy to use
6: Support 1 send and 4 receive (up to 1 transmitter is paired with 4 receivers to receive synchronously)
7: RF connection speed ≤ 1s
8: Wireless transmission distance ≥100 meters (in the case of open ground without obstruction)
9: Wireless data encryption + frequency hopping technology ensures the confidentiality of transmission. The receiving and transmitting end must be paired once for the first use, and subsequent use does not need to be paired, and it will be connected immediately after power-on.
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Three: Specifications and parameters
Working voltage: DC5V
Working current: 85mA
Modulation method: GFSK
Frequency response: 20Hz-20KHz
Dynamic range: 92dB
Audio sampling rate: 16Bit/44.1Ksps
Frequency range: 2.408-2.476GHz
Data transmission rate: 5Mbps
Transmission delay: 25ms
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Four: scope of application
Wireless speakers
● CD, DVD, TV audio wireless transmission
The audio of home theater and projector is changed to wireless
●Wireless microphone (need to add microphone preamplifier)
●Wireless monitoring system
Wireless headset
Wireless transmission of musical instrument audio signals
Five: matters needing attention
This product is a radio-sensitive device. Although this module has an adaptive frequency hopping anti-interference mechanism, in order to make the communication more stable, the use and installation should be at least 2 meters away from the wireless router.
Seven: Selection and connection of peripheral devices
1: Antenna connection
This product is equipped with a 4Dbi/2.4G high-gain omnidirectional antenna, which is connected to this product through an SMA detachable radio frequency interface. Users can also choose a compatible 2.4G antenna according to actual design needs. When in use, the PCB antenna radiator should be as far away as possible from the main body of the product, audio cables, power cables, and other signal lines that are easily interfered. At the same time, the antenna should be exposed to the space as much as possible to avoid being blocked or shielded by metal objects. Since 2.4G wireless signals cannot penetrate metal objects, there should be no metal objects blocking the antenna, so as not to affect the communication distance.
2. Audio signal connection and specifications
The audio signal input and output adopt 3.5mm audio interface, and the input/output signal conforms to common mobile phone and computer earphone interface output specifications. The audio input end of the transmitter can be directly connected to the headphone jack or line audio output port of audio source devices such as mobile phones and MP3 players through a 3.5mm audio cable, and the audio output end of the receiver can be directly pushed into the earphone or output to an active speaker or amplifier . ,
Eight: Connection and pairing instructions
Pairing method: To use this product for the first time, pairing is required. In the power-on state, short press the Connect button of the receiving end, the status indicator flashes slowly (on for 1s and off for 1s), indicating that it has entered the pairing mode. After the receiving end enters the pairing mode, short press the Connect button of the transmitter to be paired within 20 seconds, and the LED turns off 2000ms, flashing twice at a frequency of 50ms indicates that the pairing is successful. This product supports 1 to 4 (one transmitter can be paired and connected to four receivers at most), connect different receivers and repeat the same operation as above, the transmitter will memorize the 4 newly paired receivers , The next time you turn it on, you can connect automatically without pairing again.
Unpairing: It is necessary to unpair the pairing status of a certain product. Just short press the Connect button of the receiver you want to unpair to unpair the receiver.
Note: For wireless audio transmission, you need to purchase at least one transmitter and one receiver. In addition, one transmitter can be paired with multiple receivers according to needs. At present, one transmitter can be connected and paired with 1-4 receivers at the same time, so that one transmitter can transmit audio signals and receive 1-4 receivers simultaneously.
Nine: How to distinguish transmitter and receiver
At present, the transmitter and receiver are on the same board. The audio socket used by the transmitter is blue, and the audio socket used by the receiver is green. You can distinguish whether the product is a transmitter or a receiver according to the color of the audio socket.
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