DD4ADXRWireless Bodypack Receiver

120623-17 rev 9 Certification Application Attestation Statements Date: August 9, 2024 American Certification Body, Inc. 313 Park Avenue Suite 300 Falls Church, VA 22046 To Whom It May Concern: Statement for 47 CFR section 2.911(d)(5)(i) _____Shure Incorporated _____ certifies that as of the date of the application the equipment for which authorization is sought is not “covered” equipment 1 prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. If the equipment for which the applicant seeks authorization is produced by any of the entities identified on the current Covered List, including affiliates or subsidiaries of the named companies, the applicant must include an explanation on why the equipment is not “covered” equipment. Additional Explanation: <N/A> Statement for 47 CFR section 2.911(d)(5)(ii) _____Shure Incorporated _____ (“the applicant”) certifies that, as of the date of the filing of this application, the applicant ☐ - is / ☐ - is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates – see KDB 986446 Question 5) as an entity producing “covered” equipment. Thank you, By: __________________________ ______ Juan Castrejon______ (Signature 2 ) (Print name) Title: ___ Engineer Associate Staff, GC ______ Company: ___ Shure Incorporated ______ Telephone: _____ 847-600-8651 ______ 1 - The Commission’s Covered List is published by the Public Safety and Homeland Security Bureau and posted on the Commission’s website. This Covered List, which is periodically updated, identifies particular equipment, produced by particular entities, that constitutes “covered” equipment. https://www.fcc.gov/supplychain/coveredlist . 2 - Letters must be placed on appropriate letterhead.

09 2723-17 Rev 9 U.S. Agent Designation for Service of Process (Applicant is Both Grantee and U.S. Agent) TO: American Certification Body, Inc. 313 Park Avenue Suite 300 Falls Church, VA 22046 ATTENTION: FCC Certification – Section 2.911(d)(7) Information This letter is to confirm that the Applicant will also serve as the U.S. Agent for Service of Process as required by 47 CFR 2.911(d)(7). The Applicant acknowledges that they must maintain an agent for no less than one year after terminating all marketing and importation OR the conclusion of any Commission-related proceeding involving the equipment. The Applicant further acknowledges their responsibility to inform the FCC whenever the Designated U.S. Agent information changes. Applicant Company name: Shure Incorporated FRN #: 0030683478 Grantee Code: DD4 Contact Name: Juan Castrejon Street Address: 5800 W. Touhy Ave City/Province/Zip: Niles/ Illinois/ 60714-4608 Telephone No: 847-600-8651 Email: [email protected] Applicant Signature 1 : Date: August 9, 2024 Signed by (Printed Name/Title): Juan Castrejon / Engineer Associate Staff, GC 1 - Letters must be placed on appropriate letterhead. The signee for the applicant must be one of the following: Applicant ( grantee) contact of record in the FCC’s authorization system, or authorized officers or employee of the applicant (grantee).

061224-33a Request for Confidentiality Date: August 10, 2024 Subject: Confidentiality Request for: __ _IC: 616A-ADXR ______ Pursuant to FCC 47 CFR 0.457(d) and 0.459 and IC RSP-100, Section 12.4, the applicant requests that a part of the subject FCC application be held confidential. Type of Confidentiality Requested Exhibit ☐ Short Term ☒ Permanent Block Diagrams ☒ Short Term --------------------------- External Photos ☒ Short Term ☐ Permanent * 1 Internal Photos ☐ Short Term ☒ Permanent Operation Description/Theory of Operation ☐ Short Term ☐ Permanent Parts List & Placement/BOM ☐ Short Term ☐ Permanent Tune-Up Procedure ☐ Short Term ☒ Permanent Schematics ☒ Short Term --------------------------- Test Setup Photos ☒ Short Term ☐ Permanent * 3 User’s Manual _____Shure Incorporated ______ has spent substantial effort in developing this product and it is one of the first of its kind in industry. Having the subject information easily available to "competition" would negate the advantage they have achieved by developing this product. Not protecting the details of the design will result in financial hardship. Permanent Confidentiality: The applicant requests the exhibits listed above as permanently confidential be permanently withheld from public review due to materials that contain trade secrets and proprietary information not customarily released to the public. Short-Term Confidentiality for FCC Applications: The applicant requests the exhibits selected above as short term confidential be withheld from public view for a period of __ 180__ days from the date of the Grant of Equipment Authorization and prior to marketing. This is to avoid premature release of sensitive information prior to marketing or release of the product to the public. Applicant is also aware that they are responsible to notify ACB in the event information regarding the product or the product is made available to the public before the requested period has expired. ACB will then release the documents listed above for public disclosure pursuant to FCC Public Notice DA 04-1705. Short Term Confidentiality for Industry Canada Applications: Starting May 2022, ISED will recognize short term confidentiality on certain exhibits until the intended date of marketing. The applicant requests the exhibits selected above as short term confidential be withheld from public view until: (specify ISED expiration date / date of marketing) . Sincerely, By: ____ Assoc. Staff Engineer ____ ______ Craig Kozokar ______ (Signature/Title 2 ) (Print name) 1 - The asterisked items (*) require further information to be provided to ACB before permanent confidentiality will be extended to these exhibits. Please refer to FCC KDB 726920 and the specific Document link for D01 found at: https://apps.fcc.gov/oetcf/kdb/forms/FTSSearchResultPage.cfm?switch=P&id=41731 and review section II, 3) regarding specific information that must accompany these requests. 2 - Must be signed by applicant contact given for applicant on the FCC site, or by the authorized agent if an appropriate authorized agent letter has been provided. Letters should be placed on appropriate letterhead.

Declaration of Authorization We Name: Shure Incorporated Address: 5800 West Touhy Avenue, Niles, IL 60714-4608, USA Declare that: Name Representative of agent: Marlin Chen Agent Company name: MRT Technology (Suzhou) Co., Ltd Address: D8 Building, Youxin Industrial Park, No.2 Tian'edang Rd., Wuzhong Economic Development Zone City: Suzhou Country: China is authorized to apply for Certification of the following product(s): Product: Wireless Bodypack Receiver FCC ID: DD4ADXR Model No.: ADXR, ADXR-A, ADXR-B, ADXR-C Sincerely, Signature： Print Name: Juan Castrejon Title: Assoc. Staff Engineer Company: Shure Incorporated Date: August 9, 2024

Cover Letter Date: August 9, 2024 Federal Communications Commission Authorization and Evaluation Division FCC ID: DD4ADXR Please be notified that we, the undersigned, Shure Incorporated declares that the product which bears the above FCC ID is also compliant with the FCC requirements for SDoC. And the SDoC procedure shall be carried out prior to marketing the device in the US. Sincerely, Signature： Print Name: Juan Castrejon Title: Assoc. Staff Engineer Company: Shure Incorporated

Declaration letter For our business issue and marketing requirement, we would like to list different model numbers as following: FCC ID: DD4ADXR Model No.: ADXR, ADXR-A, ADXR-B, ADXR-C Model Difference: ADXR is regulatory model number. The difference among ADXR-A, ADXR-B, ADXR-C is that they have different receive frequencies. The receive frequency of ADXR-A is 470 - 636 MHz, the receive frequency of ADXR-B is 606 - 810 MHz, the receive frequency of ADXR-C is 925 - 960MHz. No other differences. Signature: Print Name: Juan Castrejon Title: Assoc. Staff Engineer Company: Shure Incorporated Date: August 9, 2024

Duty Cycle Measurement of Shure ADXR 1. Purpose ADXR Portable Wireless Receiver duty cycle measurement for FCC/ISED regulatory approval. 2. Test Equipment Used Spectrum Analyzer – Agilent N9020B Directional Coupler – Narda 4226−10 3. Test Setup Duty cycle measurement was tested using a conducted setup (Fig. 1). The RF output of ADXR was connected to the input of directional coupler. The output port of directional coupler was connected to 2.4 GHz half-wave antenna communicating with AD610. The coupled port of directional coupler was connected to Agilent spectrum analyzer N9020B which was used to monitor spectrum output of the ADXR. Test Setup Photo Duty Cycle Measurements Duty cycle measurements were performed in the following steps: 1. Spectrum Analyzer screenshots were captured while the ADXR was communicating with AD610 for 10 times. With Zigbee based ShownLink using CSMA/CA communication protocol, all screenshots (Fig. 1-10) show different distribution packets being sent from the ADXR to the AD610. Several consecutive measurements were taken and the amount of captured packets was counted. The spectrum analyzer sweep time was set to 2 seconds. Sweep time intervals to ensure that the spectrum analyzer was capable to capture all packets. The standard deviation (SDEV) of sent packets / measurement was then calculated. In order to ensure statistical validity of the measurements, the value of Mean+3*SDEV was used for final calculation of the duty cycle (Table 1) Note: The spectrum analyzer images presented in this report have significantly lower resolution than the spectrum analyzer due to resolution loss while saving from the spectrum analyzer to disk 2. A typical packet size was captured (Fig. 11) and it was then used for the final duty cycle calculation (Table 1) 3. ADXR duty cycle calculations were performed with the above results in section 4 Figure 1. ADXR communicating with AD610 - 7 packets in 2 second interval Figure 2. ADXR communicating with AD610 - 3 packets in 2 second interval Figure 3. ADXR communicating with AD610 - 6 packets in 2 second interval Figure 4. ADXR communicating with AD610 - 6 packets in 2 second interval Figure 5. ADXR communicating with AD610 - 4 packets in 2 second interval Figure 6. ADXR communicating with AD610 - 3 packets in 2 second interval Figure 7. ADXR communicating with AD610 - 7 packets in 2 second interval Figure 8. ADXR communicating with AD610 - 2 packets in 2 second interval Figure 9. ADXR communicating with AD610 - 6 packets in 2 second interval Figure 10. ADXR communicating with AD610 - 7 packets in 2 second interval Figure 11 – Typical ADXR packet duration Duty Cycle Calculations Packet Count Distribution Using the counted packets of several consecutive measurements, a standard deviation (SDEV) measurement was calculated. In order to ensure statistical validity of measurements, Mean+3*SDEV was used for final calculation of the duty cycle (Table 1) Figure# # packets 1 7 2 3 3 6 4 6 5 4 6 3 7 7 8 2 9 6 10 7 Mean 5.1 STDEV 1.81 Mean+3*STDEV 10.54 Table 1 - Packet count distribution Duty Cycle The duty cycle calculation is shown in Table 2 below. # of Packets Single Packet Duration (ms) Total PA-ON Time in 2 sec. Interval (ms) Duty Cycle (%) Mean out of packets 5.1 2.3 11.73 0.59 Mean+3*STDEV 10.54 2.3 24.24 1.21 Table 2 - Duty cycle calculations No_Packets_2sec = 10.54 Single_Packet_Period = 2.3 ms No_Packets_100ms = No_Packets_2sec * 100ms / 2000ms No_Packets_100ms = 0.527  = No_Packets_100ms * Single_Packet_Period / 100ms  = 0.0121 DutyCycle_correction_dB = 20 * log() DutyCycle_correction_dB = -38.33

Shure ADXR Zigbee Measurements of Shure ADXR Zigbee antenna at 2.4 GHz For Regulatory Approval Model Number: 134-42517 (part of PCB construction) Shure Incorporated 5800 W Touhy Ave, Niles, IL 60714 June 7 th , 2024 Prepared by Adem Celebi, Ph.D. Shure ADXR Zigbee Sandeep Rangdal Table of Contents 1. ADXR – Digital PSM Receiver .............................................................................................................. 1 1.1 ADXR ............................................................................................................................................ 1 2. Appendix ............................................................................................................................................... 2 Table of Figures Figure 1 – ADXR Zigbee (2405 MHz) 3D radiation patterns and scale ........................................................ 1 Figure 2 – Antenna reference angles ............................................................................................................ 2 Shure ADXR Zigbee 1. ADXR – Digital PSM Receiver 1.1 ADXR • Test frequency = 2405-2480 MHz • Maximum gain = 1.3 dBi Figure 1 – ADXR Zigbee (2405 MHz) 3D radiation patterns and scale Shure ADXR Zigbee 2. Appendix Figure 2 - Antenna reference angles