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User Manual for LG models including: WL1BKR22, WL1BKR22 Wireless Audio Module, Wireless Audio Module, Audio Module, Module
LG Electronics USA, Inc. WL1BKT22 Wireless Audio Module BEJ-WL1BKT22 BEJWL1BKT22 wl1bkt22
File Info : application/pdf, 8 Pages, 731.66KB
DocumentDocumentUser Manual Product name Wireless Audio Module Product Model WL1BKR22 /WL1BKT22 Document No Version V3.1 Availability date 2024-12-05 Edit ChaoMa Review Approve Xiao_Chen 1 1. General specifications WL1BKT22 and WL1BKR22 is a small size and low power wireless audio transmitter module, which is designed based on Beken CC258 MCU and Beken BK5813 RF Chip. Forced the 5.2/5.8 GHz GFSK modulation Size: 35MMx35MMx5. 03mm PCB onboard antenna I2S digital audio interface Built-in MCU memory 256K, BUILT-IN MCU flash memory 192K I2C controls external devices I/O configuration Primary and secondary audio delay time <20ms Applications: Wireless speakers, wireless subwoofers, home theater Module style 2 2. The application UI WL1BKT22 Operation description First: the module is powered on and started by 3.3V; Second: the host transmits the audio signal to the module through I2S; Third: THE MCU CC2538 on the module decodes the I2S audio signal, and then transmits the decoded audio signal to the BK5813 RF chip on the module through SPI; Fourth: the BK5813 RF chip on the module transmits the audio through wireless transmission; Fifth: there is I2C communication between the module and the host, both sides obtain the status and control through I2C; The product automatically stops the transmission if the information fails to be transferred or the operation fails. WL1BKT22 as the main device WL1BKR22 Operation description First: The module is powered on and started by 3.3V; Second: The BK5813 RF chip on the module receives the audio signal transmitted by the transmitting module through wireless transmission; Third: MCU CC2538 on the module obtains the audio received by BK5813 through SPI; Fourth: MCU CC2538 decodes the acquired audio signal and transmits the audio to the power amplifier on the subwoofer power amplifier board through I2S; Fifth: There is I2C communication between the module and the subwoofer power amplifier board, initializing the power amplifier on the subwoofer power amplifier board, and I0 port communication between the module and the subwoofer power amplifier board, controlling the power amplifier switch and LED state display. WL1BKR22 is a client device controlled by the WL1BKT2. WL1BKT22 device is classified as a master device. WL1BKR22 is classified as a Client device under the control of the WL1BKT22. The product automatically stops the transmission if the information fails to be transferred or the operation fails. ISED RSS-247 (6.4) required by the technology When there is no information to transmit or an operation fails, the device automatically discontinue transmission. After the transmission is discontinued, the TX module enters the reconnection state until it is reconnected or the power supply is switched off passively. After the transmission is discontinued, the RX module enters the RE-connection state for one minute, IF no connection, enters the standby mode after one minute. FCC 15.407 (c) required by the technology The device would automatically discontinue transmission if there is no information to transmit or if the operation fails. After the transmission is discontinued, the TX module enters the reconnection state until it is reconnected or the power supply is switched off passively. After the transmission is discontinued, the RX module enters the RE-connection state for one minute, IF no connection, enters the standby mode after one minute. WL1BKT22 (TX module): The reconnection state is TX will transmit control signal to RX for pair each other. The TX re-try to transmit control signal to RX on complete frame or burst intervals until they connect successfully or power supply be off passively. WL1BKR22 (RX module): The connection state is no transmit data by RX module. It's only permit to transmit the information that is repetitive codes to TX on complete frame or burst intervals. The standby mode is enter sleep mode to save consumption power. On this mode, the RX doesn't transmit any information or data to TX. The module-[WL1BKT22] is installed in the speaker, and the signal of the sound is provided through the HDMI or Optical ports of the TV audio products; When the speaker receive the sound signal, it will transmit the sound signal to another speaker (which is installed with the module-[WL1BKR22]). 3 Block diagram Note: FCC IC Frequencies of this transmitter 5155-5245MHz and 5730-5848MHz. Note: EU/UKCA Frequencies of this transmitter 5730-5848MHz. Note: MCU built-in memory 256K, MCU built-in flash memory 192K and power supply regulation Communication Spec Modulation Data Rate RF Output Power Frequency Bands RF Technical Specification U-NII Band 3 GFSK 2 Mbps UNII Band 3: 14 dBm (EIRP) UNII Band 3: 5730-5848 MHz 4 FCC Statement Federal Communication Commission Interference Statement 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 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. FCC Caution: Any changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate this 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. Manufacturers integrating the Radio Module into other devices should note the following: The device is compliant with part 15.247 and 15.407 of Title 47 of the FCC rules. If the Link Module is integrated into a new host product, the final host product still requires Part 15 Subpart B compliance testing with the modular transmitter installed. IC Statement This Class B digital apparatus complies with Canadian ICES-003. 5150-5250MHz is limited to use indoor only This device complies with Industry Canada license-exempt RSS standard(s). Operation is subject to the following two conditions: (1) this device may not cause interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Cet appareil est conforme aux normes CNR exemptes de licence d'Industrie Canada. Le fonctionnement est soumis aux deux conditions suivantes : (1) cet appareil ne doit pas provoquer d'interférences et (2) cet appareil doit accepter toute interférence, y compris celles susceptibles de provoquerun fonctionnement non souhaité de l'appareil. This Class B digital apparatus complies with Canadian ICES-003. Cetappareilnumérique de la classe B estconforme á la norme NMB-003 du Canada. -Label and Compliance Information The final end product must be labeled in a visible area with the following: "Contains FCC ID: BEJ-WL1BKT22", "Contains FCC ID: BEJ-WL1BKR22", "Contains IC: 2703H-WL1BKT22" "Contains IC: 2703H-WL1BKR22". The grantee's FCC ID can be used only when all FCC/ IC compliance requirements are met. -RF exposure The module will install into mobile device such as Sound Bar This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator & your body. Information on test modes and additional testing requirements -OEM integrator is still responsible for testing their end-product for any additional compliance requirements required with this module installed (for example, digital device emissions, PC peripheral requirements, additional transmitter in the host, etc.). 5 Antenna Specification LG, WL1BKR22 No. Antenna Part Number Manufacturer Antenna Type Frequency (MHz) Max Gain(dBi) 5150 3.20 5170 3.05 5190 3.16 5210 3.45 5230 3.68 5250 3.74 5450 2.64 1. RX Antenna N/A PCB Printing Antenna 5470 5490 2.44 2.34 5500 2.14 5750 3.09 5770 3.00 5790 2.94 5810 3.00 5830 3.14 5850 3.05 PCB antenna is integral to this radio module. This antenna cannot be modified in any way without a Class II Permissive Change fi ling for the module. Antenna #1 Antenna Specification LG, WL1BKT22 Antenna #2 No. Antenna Part Number Manufacturer Antenna Type Frequency (MHz) Max Gain(dBi) 5150 2.66 5170 2.87 5190 2.94 5210 3.25 5230 3.23 5250 3.11 5450 2.98 1. Antenna #1 N/A PCB Printing Antenna 5470 5490 2.98 2.77 5500 2.59 5750 2.38 5770 2.38 5790 2.48 5810 2.33 5830 2.37 5850 2.22 No. Antenna Part Number Manufacturer Antenna Type Frequency (MHz) Max Gain(dBi) 5150 3.57 5170 3.35 5190 3.42 5210 3.69 5230 4.00 5250 3.94 5450 3.32 2. Antenna #2 N/A PCB Printing Antenna 5470 5490 3.48 3.37 5500 3.42 5750 3.98 5770 4.05 5790 3.79 5810 3.94 5830 4.20 5850 4.09 PCB antenna is integral to this radio module. This antenna cannot be modified in any way without a Class II Permissive Change fi ling for the module. Limited module procedures Not applicable. The module complies with FCC Part 15.247 / Part 15.407 and applies for Single module approval. Trace antenna designs Not applicable. The antenna is integrated into the module and cannot be modified. See section Information on test modes and additional testing requirements The production test of the module was performed using the iTenest brand WT-208C instrument. This transmitter is tested in a standalone mobile RF exposure condition and any co-located or simultaneous transmission with other transmitters need class II permissive change re-evaluation or new certification. Note EMI Considerations The host manufacture is recommended to use Module Integration Guide recommending. RF design engineering testing and evaluation in case non-linear interactions generate additional non-compliant limits due to module placement to host components or properties. How to make changes 1. The original chip has been discontinued and only a small amount of stock is available. 2. New and old chips have different Part number (P/N) to distinguish. 3. The appearance of the module cannot identify whether it is an old or new chip. 4. The PO number can be traced back to the MES system production record to determine whether it is an old or new chip. Contact information: Factory: Shenzhen Shi Xinzhongxin Technology Co., Ltd. TEL:+86-755-2917-9480 Contact Name: Ma Chao Contact Mail: machao@c-chip.com.cn