FCC ID: A3LWSN720S Audio Transceiver

WSN720S User Manual 1. Product Description The WSN720S module is a wireless audio module based on the Microchip DARR83. This module can used to build an uncompressed wireless digital audio transceiver operating in the 2.4GHz, 5.2GHz and 5.8GHz bands. The wireless audio link supports up to two stereo audio streams and comes together with additional features such as: data encryption, pairing functionality, bi-directional control data messages, low power audio snooze mode, WLAN detection and Automatic Frequency Allocation. The DARR83 chip itself provides the basic functions of Audio Processing and buffering, Data Link Layer and Physical Layer. The WSN720S module integrates all functionality for a wireless digital and analog audio connection, comprising the below features:

DARR83 Wireless Audio Processor 2.4GHz/ 5.2GHz/ 5.8 GHz RF Transceiver Embedded Antennas dual antenna One TX transmitter and antenna diversity receiver (not simultaneous TX transmission) Digital audio interfaces (I2S) Built-in SPI interface Flash 24 pins interface connector for power, audio output, control interface and GPIOs Regulated 5V supply Integrated 24 bit stereo Audio DAC + Headphone AMP Integrated 16 bit Audio ADC + Microphone AMP 2. Functions & Features High Quality Audio Up to four stereo audio channels, fully bidirectional, up to 24-bit/96 kbps uncompressed audio Low latency<20ms for real-time audio and lip sync Low latency compression algorithm optimized for voice applications, headphones Programmable digital audio gain Inter-speaker synchronization; Low-jitter audio clock sync Networking and Connectivity In-room or multi-room network topology 22Mbps Bandwidth in 2.4G, 5.2GHz and 5.8 GHz Bands Point-to-Point and Point-to-Multipoint Bidirectional data channel (100 kbps) Simple Pairing and Association Function 4 I2S Data pins, each provided with their own pair of BCK/LRCK signals or stereo S/PDIF Version 1.0 Samsung Electronics page 1 of 9 WSN720S input/output Master and Slave I2C bus for external control functions Coexistence and Robustness Enhanced robustness against both in and out of band interferers like: WiFi and cordless phones Coexistence with 802.11a, b, g and n Automatic receiver antenna diversity minimizes fading and multi-path effects Link quality monitoring Soft audio muting under poor link circumstances Power Management Low power consumption Automatic RF output power control Power down Duty Cycle mode: If no link established, modules (both TX and RX) will enter power down mode Integrated 8052 MCU The DARR83 integrates an 8052 MCU. This includes the following features:

45 KByte Code RAM 8 KByte Data RAM 4 Timer/Counters UART Digital Audio Clock Synchronization The digital audio clock synchronization is an additional more cost effective method for synchronization of audio sample on the receiving side with respect to the transmitted audio samples. The digital clock synchronization feature works for output audio sample rates of 96 and 48kbps. Sample Rate Converter (SRC) + Sample Rate Detector The SRC can handle the following input sample rates [Ksps]:

44.1 48 96 192(using I2S in slave mode) Version 1.0 Samsung Electronics page 2 of 9 WSN720S 3. Product Specification Product Form Factor Module Size (mm): 26.0 (W) X 60.0 (L) X 3.3 (H) PCB size (mm): 26.0 (W) X 60.0 (L) X 1.1 (H) Shield can (mm): 23.3 (W) X 23.0 (L) X 1.7(H) Antenna Type : Dual- PCB Printed Antenna Operating Contions Symbol Parameter Min Typ. Max Unit Supply Voltage Supply current Operating Temperature 4.5

-

-20 5.0

-

25 5.5 450 50 V mA V dc I dc Temp RF & Audio Characteristics Parameter Min Typ. Max Unit Modulation QPSK TX/RX operating 1 TX transmit /

RX antenna diversity Bandwidth 22 MHz RF Band (channel) 5.2GHz (low/mid/high) 5180 (4) 5210 (5) 5240 (6) MHz 2.4GHz (low/mid/high) 2412 (1) 2438 (2) 2464 (3) 5.8GHz (low/mid/high) 5736 (7) 5762 (8) 5814 (9) TX Average RF Output Power

(Typical: avg. /peak, TA =

25 C) RX Sensitivity Audio Latency 2.4GHz 5.2GHz 5.8GHz 13.0 12.0 6.0 15.0 14.0 8.0

-82 20 17.0 16.0 10.0 dBm dBm ms Version 1.0 Samsung Electronics page 3 of 9 WSN720S Audio Bit Resolution Audio Sampling Rate 24 48 bit Kbps Antenna Characteristics PARAMETER ANTENNA Frequency Range Return Loss Peak Gain Average Gain Efficiency ANT-A ANT-B ANT-A ANT-B ANT-A ANT-B ANT-A ANT-B Impedance BAND 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz 2.4GHz 5.2GHz 5.8GHz MIN 2400 5150 5725 TYP MAX UNIT 50 2480 5250 5850

-13

-8

-13

-13

-8

-15 0.8 3.7 4.4 2.5 4.3 4.2

-2.6

-0.8

-1.0

-1.7

-0.8

-1.2 55 83 80 67 84 76 MHz dB dBi dBi

%

Version 1.0 Samsung Electronics page 4 of 9 WSN720S 4. I/O Pin Descriptions Pin #

Pin Name 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 VDD VDD PWM RST#

MUTE IRQ / PWR_CTRL RESET#

I2C_SCL_S I2C_SDA_S I2C_SCL_M I2C_SDA_M MCLK GND BCK LRCK DAT_W DAT_X MON_TXD (UART_TXD) DAT_Y / FW_SEL IR_RST#

ID SET#

RED LED BLUE LED (UART_RXD) IR_SD# (HW_MUTE) GND TX Module RX Module Function Description I/O PWR Regulated 4.5V to 5.5V input PWR Regulated 4.5V to 5.5V input Function Description I/O PWR Regulated 4.5V to 5.5V input PWR Regulated 4.5V to 5.5V input O I I I/O Host MCU Interrupt Module reset from Host MCU, Internal Pull-Up I2C Clock Input from Host MCU,

(S_MISO) I2C Data In/Output to Host MCU ,(S_MOSI) Not use (Open) Not use (Open) GND Ground I I I I O I I2S bit clock input from Host system I2S Data window clock input from Host system I2S DATA Rear L/R I2S DATA input from host system

(Subwoofer) UART Debug monitor I2S DATA Rear Top L/R O O Mute audio output O I SMPS stand-by mode (Active High) Module reset from Host MCU, Internal Pull-Up Not use (Open) I I/O Not use (Open) O I/O O

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O O O O O I O I I/O O I I2C Clock Output for AMP IC I2C DATA for AMP IC This port must be used for I2S output Ground I2S bit clock input from Host System I2S Data window clock input from Host system I2S DATA I2S DATA input from Host system

(Subwoofer) UART Debug monitor FW Select ( Woofer or Rear) AMP Reset ID Set Button RED LED Control & Rear L/R detect option Blue LED Control Detect IR Amp Shutdown GND Ground GND Ground

#24

#1 Version 1.0 Samsung Electronics page 5 of 9 WSN720S 5. Label TX Module Label RX Module Label Version 1.0 Samsung Electronics page 6 of 9 WSN720S 6. Notice FCC Statement This device complies with Part 15 of FCC Rules, Operation is Subject to following two conditions:

(1) This device may not cause harmful interference, and

(2) This device must accept any interference received including interference that cause undesired operation. Caution: Any changes or modifications to the equipment not expressly approved by the party responsible for compliance could void user s authority to operate the equipment. This equipment has been tested and found to comply within 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 different circuit from that to which the receiver is connected Consult the dealer or an experienced radio/TV technician for help. This device and its antenna(s) must not be co-located or operation in conjuction with any other antenna or transmitter. This device is going to be operated in 5.15~5.25GHz frequency range, it is restricted in indoor environment only IMPORTANT NOTE:

FCC Radiation Exposure Statement;

This appliance and its antenna must not be co-located or operation in conjunction with any other antenna or transmitter. A minimum separation distance of 20 must be maintained between the antenna and the person for this appliance to satisfy the RF exposure requirements. IMPORTANT NOTE:

This module is intended for OEM integrator. The OEM integrator is still responsible for the FCC compliance requirement of the end product, which integrates this module. Version 1.0 Samsung Electronics page 7 of 9 WSN720S 20cm minimum distance has to be able to be maintained between the antenna and the users for the host this module is integrated into. Under such configuration, the FCC Part 2.1091 radiation exposure limits set forth for an population/

uncontrolled environment can be satisfied. Any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment. That separate approval is required for all other operating configurations, including portable configurations with respect to part 2.1093 and different antenna configurations. USER MANUAL OF THE END PRODUCT:

In the users manual of the end of product, the end user has to be informed to keep at least 20cm separation with the antenna while this end product is installed and operated. The end user has to be informed that the FCC radio-frequency exposure guidelines for an uncontrolled environment can be satisfied. The end user has to also be informed that any changes or modifications not expressly approved by the manufacturer could void the users authority to operate this equipment. If the size of the end product is smaller than 8x10cm, then additional FCC part15.19statement is required to be available in the users manual; This device complies with Part15 of FCC rules. LABEL OF THE END PRODUCT:

The final end product must be labeled in a visible area with the following " Contains FCC ID: A3LWSN720S ". If the size of the end product is larger than 8x10cm, then the following FCC part 15.19 statement has to also be available on the label: This device complies with Part 15 of 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. IC Statement This Class B digital apparatus complies with Canadian ICES-003. 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. Cet appareil numrique de la classe B est conforme la norme NMB-003 du Canada. Version 1.0 Samsung Electronics page 8 of 9 WSN720S This device and its antenna(s) must not be co-located or operation in conjuction with any other antenna or transmitter. The device could automatically discontinue transmission in case of absence of information to transmit, or operational failure.Note that this is not intended to prohibit transmission of control or signaling information or the use of repetitive codes where required by the technology. The device for the band 5150-5250 MHz is only for indoor usage to reduce potential for harmful interference to co-

channel mobile satellite systems. IMPORTANT NOTE:

IC Radiation Exposure Statement:

This equipment complies with IC RSS-102 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 IMPORTANT NOTE:

This module is intended for OEM integrator. The OEM integrator is still responsible for the IC compliance requirement of the end product, which integrates this module. 20cm minimum distance has to be able to be maintained between the antenna and the users for the host this module is integrated into. Under such configuration, the IC RSS-102 radiation exposure limits set forth for an population/

uncontrolled environment can be satisfied. Any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment. USERS MANUAL OF THE END PRODUCT:

In the users manual of the end product, the end user has to be informed to keep at least 20cm separation with the antenna while this end product is installed and operated. The end user has to be informed that the IC radio-frequency exposure guidelines for an uncontrolled environment can be satisfied. The end user has to also be informed that any changes or modifications not expressly approved by the manufacturer could void the user's authority to operate this equipment. IC statement is required to be available in the users manual: This Class B digital apparatus complies with Canadian ICES-003. 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. LABEL OF THE END PRODUCT:

The final end product must be labeled in a visible area with the following " Contains IC : 649E-WSN720S ". Version 1.0 Samsung Electronics page 9 of 9

WSN720S Product Label TX Module Label RX Module Label Version 1.0 Samsung Electronics page 1 of 1

19 Chapin Rd, Building D. Pine Brook, New Jersey Tel No : 973-808-6375 Fax No : -

Special Power of Attorney I, Minhyung Cho of Samsung Electronics Co., Ltd. hereby authorize appoint Young-taek Lee of CTK Co., Ltd. to represent me to act on my behalf to do any and all of the following :

Sign on my behalf the agency, anti-drug and confidentiality cover letters and apply to FCC for the products. The right, powers and authority in fact to exercise any and all of the rights and powers herein granted shell commence and be in full force from May 11, 2020 and continue to effective unless specifically terminated by either party. Applicant : Samsung Electronics Co., Ltd. FCC ID : A3LWSN720S Dated May 11, 2020 Sincerely, Minhyung Cho / Staff Engineer Samsung Electronics Co., Ltd.

19 Chapin Rd, Building D. Pine Brook, New Jersey Tel No : 973-808-6375 Fax No : -

Attn: Timco Engineering, Inc. Ref: Permissive change for Model : WSN720S Applicant: Samsung Electronics Co., Ltd. Dear Examiner, This is to request a Permissive change for Model WSN720S originally Certificate on 04/11/2018. The change under this application is to add frequency(5 823.5 MHz). This is a change that follows V.B.2) of KDB 178919 D01.

- KDB 178919 D01 V.B.2) There no increase in the output power rating on new frequencies. The device remain electrically, Software Configuration and mechanically identical to the originally certified device and no changes have been made. Sincerely,

. Minhyung Cho / Staff Engineer Samsung Electronics Co., Ltd.

19 Chapin Rd, Building D. Pine Brook, New Jersey Tel No : 973-808-6375 Fax No : -

Special Power of Attorney Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attn: OET Dept. I, JENNI CHUN of SAMSUNG Electronics Co., Ltd. hereby appoint Minhyung Cho of SAMSUNG Electronics Co., Ltd. to represent me to act on my behalf to do any and all of the following :

Sign on my behalf the agency, anti-drug and confidentiality cover letters and apply to FCC for the products. The right, powers and authority in fact to exercise any and all of the rights and powers herein granted shell commence and be in full force from May 11, 2020and continue to May 11, 2021 effective unless specifically terminated by either party. This authorization is limited to the product of as following:

FCC ID: A3LWSN720S Dated May 11, 2020 Sincerely,. NAME: JENNI CHUN TITLE: General Manager, Regulatory & Environmental Affairs Applicant: Samsung Electronics America, Inc Address: 19 Chapin Rd, Building D. Pine Brook, NJ 07058

19 Chapin Rd, Building D. Pine Brook, New Jersey Tel No : 973-808-6361 Fax No : -

Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: A3LWSN720S Pursuant to Sections 0.457 and 0.459 of the Commissions Rules, we hereby request confidential treatment of information accompanying this application as outlined below:

Exhibit Type Block Diagram File Name Block Diagram (A3LWSN720S).pdf Schematics (A3LWSN720S).pdf Schematics_PCB Layout (A3LWSN720S).pdf Part List (A3LWSN720S).pdf Operational Description (A3LWSN720S).pdf Operational Description_Antenna specification

(A3LWSN720S).pdf Operational Description_ SOFTWARE SECURITY DESCRIPTION (A3LWSN720S).pdf Schematics Parts List Operational description The above materials contain trade secrets and proprietary information not customarily released to the public. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that pursuant to Section 0.457 of the Rules, disclosure of this application and all accompanying documentation will not be made before the date of the Grant for this application. Sincerely, Minhyung Cho / General Manager Samsung Electronics Co Ltd

March 23, 2018 Attn: Reviewing Engineer Federal communications Commission 7435 Oakland Mills Road Columbia, MD 21046 RE: PART 15 UNLICENSED SINGLE MODULAR TRANSMITTER APPROVAL To whom It May Concern:

We, SAMSUNG Electronics Co., Ltd., Hereby requests a Single Modular Approval of our Audio transceiver Module, described as follows:

Brand name: SAMSUNG Model name: WSN720S FCC ID: A3LWSN720S The requirements of secion 15.212 of the FCC rules have been met as indicated in the following statements :

1. The radio elements of the modular transmitter must have an own shielding. The physical crystal and tuning capacitors may be located external to the shielded radio elements. :

The radio portion of this module has been shielded, Please see photographs with the application. 2. The modular transmitter must have buffered modulation/data inputs (if such inputs are provided) to ensure that the module will comply with part 15 requirements under conditions of excessive data rates or over-modulation. :

Yes, All inputs to the modules are buffered through logic or microprocessor inputs. Data rates are fixed/protected and can not be altered. Base band signals are band and gain limited, so theres no possibility for overmodulation.

19 Chapin Rd, Building D. Pine Brook, New Jersey Tel No : 973-808-6361 Fax No : -

Special Power of Attorney Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attn: OET Dept. Product/ Model Number: Audio Transceiver / WSN720S I, Chan Ho Youn of Samsung Electronics Co Ltd hereby Young-taek Lee of CTK Co., Ltd. to represent me to act on my behalf to do any and all of the following :

Sign on my behalf the agency, anti-drug and confidentiality cover letters and apply to FCC for the products. The right, powers and authority in fact to exercise any and all of the rights and powers herein granted shell commence and be in full force from 03/30/2018 and continue to e effective unless specifically terminated by either party. This authorization is limited to the product of as following:

FCC ID: A3LWSN720S Dated 03/30/2018, Sincerely,. NAME: Chan Ho Youn TITLE: Head of QA Lab (General Manager) Applicant: Samsung Electronics Co Ltd Address: 19 Chapin Rd, Building D. Pine Brook, New Jersey

19 Chapin Rd, Building D. Pine Brook, New Jersey Tel No : 973-808-6361 Fax No : -

FCC Software Configuration Control Declaration Date: 2018-03-30 Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 Attn: OET Dept. FCC ID : A3LWSN720S Product/ Model Number: Audio Transceiver / WSN720S Regarding FCC Country Code Selection guidelines identified in KDB 594280 "Country Code Selection". All applications for equipment authorization for transmitters that can have radio parameters, or other technical parameters, reported to the Commission set by software must have an attestation indicating that no third party will have software, or configuration control, to program the device out of compliance of the technical rules under which it has been certified. We declare that no third party will have software, or configuration control, to program the device out of compliance of the technical rules under which it has been certified. Minhyung Cho/ General Manager Samsung Electronics Co Ltd FCC Software Configuration Declaration Letter Rev1.0