The BK9531/ BK9532 chip is a chip set for wireless high-quality voice transmission, which comprises a transmitting chip BK9531 and a receiving chip BK9532, wherein each chip covers the frequency range of 160~270 MHz and U The segment is 500~980 MHz. The BK9531/ BK9532 adopts the pi/ 4DQPSK digital modulation and high-performance audio ADC and the DAC, and the high-fidelity audio codec is matched with the very low-delay audio codec, so that the high-fidelity digital audio transmission can be applied to the visual singing, the stage performance and the teaching system. Since the BK9531/ BK9532 realizes the complete integration from the radio frequency to the base band on a single chip, the pressure expander is omitted, so that the size of the PCB can be remarkably reduced, the production reliability is greatly improved, and the system cost is reduced.
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| The transmission chip BK9531 features： 1. Maximum transmit power: 14 dBm (V) 10 dBm (U) 2. Microphone gain range: 0 ~47.5 dB, 0.5 dB / step 3. Audio AGC and limited radio frequency AGC and AFC 4. Special GPIO indicates transmit audio signal energy (GPIO3) synchronous state 5. Automatic noise suppression, support dual-frequency diversity transmitter, active / passive whistling, packet loss compensation mechanism |
Receiver chip BK9532 characteristic： 1. Reception sensitivity:-96 dBm (V segment)-96 dBm (U segment) maximum 2. Support 6 antenna diversity, antenna automatic selection 3. Special GPIO indicating receiving audio signal energy, special GPIO indicating 4. Two segments of 7 tap digital reverberation, digital mute, 15 segments of digital audio balance, active / passive whistling, packet loss compensation mechanism |
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BK9531/32 common parameter： 1. Supports external PCM / IIS dual-mode digital audio interface (single and double channel) and 48k/32k/24k/12k audio sampling rate 2. Encapsulation: QFN 5x5 32-Pin 3. Recommended working voltage: 2.8V to 3.6V (low voltage can work to 2.2V, but performance will become worse) 4. Operating frequency: 160270V); 450 ~ 980 MHz (U) 5. Crystal frequency: 24.576 MHz, crystal adjustment range: +/-20 ppm 6. digital modulation mode: pi/4 DQPSK; Bandwidth occupied:<300 kHz；Transmission rate 204.8Ksps 7. Delay: input from the microphone to the audio output delay is less than 3 ms (48 kHz sampling rate mode and no anti-howling function is used) 8. Audio signal-to-noise ratio: 96 dB, frequency response: 30-20 kHz 9. 1-byte dedicated data channel: 7 kbps, internal CRC check, audio and data with 32-bit encrypted word transmission |
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