2BOOE-NEXUSTMPHUMBluetooth LE Beacon Space Temperature & Humidity Sensor

IC recognized # 3462B CETECOM Inc. 411 Dixon Landing Road  Milpitas, CA 95035  U.S.A. Phone: + 1 (408) 586 6200  Fax: + 1 (408) 586 6299  E-mail: [email protected]  http://www.cetecom.com CETECOM Inc. is a Delaware Corporation with Corporation number: 2905571 V5.0 2015-10-27 © Copyright by CETECOM Radio Frequency Exposure Evaluation Report For: NexRev LLC Marketing Name: Nexus Bluetooth Compact Space Sensor Model Name: BT Compact Temp/RH Combo Product Description: Bluetooth LE Beacon Space Temperature & Humidity Sensor FCC ID: 2BOOE-NEXUSTMPHUM IC: 33828-NEXUSTMPHUM Applied Rules and Standards: CFR Part1 (1.1307 &1.1310), Part 2 (2.1091), FCC KDB 447498 D01 General RF Exposure Guidance v06 ISED RSS-102 Issue 6 Report number: EMC_NEXRE_006_25001_RF_Exposure_Rev2 DATE: 2026-03-31 Test Report #: EMC_NEXRE_006_25001_RF_Exposure_Rev2 FCC ID: 2BOOE-NEXUSTMPHUM Date of Report 2026-03-31 Page 2 of 9 IC: 33828-NEXUSTMPHUM TABLE OF CONTENTS 1 Assessment ........................................................................................................................................... 3 2 Administrative Data ............................................................................................................................. 4 2.1 Identification of the Testing Laboratory Issuing the EMC Test Report ................................................... 4 2.2 Identification of the Client ................................................................................................................. 4 2.3 Identification of the Manufacturer ...................................................................................................... 4 3 Equipment under Assessment .............................................................................................................. 5 3.1 EUT Specifications .......................................................................................................................... 5 4 RF Exposure Limits and FCC and ISED Basic Rules ......................................................................... 6 FCC ........................................................................................................................................................... 6 ISED RSS 102 ............................................................................................................................................ 7 5 Evaluations ........................................................................................................................................... 8 5.1 Analysis of RF Exposure ................................................................................................................. 8 5.2 FCC RF Exposure (Standalone) ....................................................................................................... 8 5.3 ISED RF Exposure (Standalone) ..................................................................................................... 8 6 Revision History .................................................................................................................................. 9 Test Report #: EMC_NEXRE_006_25001_RF_Exposure_Rev2 FCC ID: 2BOOE-NEXUSTMPHUM Date of Report 2026-03-31 Page 3 of 9 IC: 33828-NEXUSTMPHUM 1 Assessment This RF Exposure evaluation report provides evidence for compliance of the below identified device with the RF Exposure limits for mobile devices as defined in FCC CFR Part 1 (1.1307 &1.1310), Part 2 (2.1091 & 2.1093) and ISED standard RSS- 102 issue 6 under worst case conditions (measured or rated RF output power, antenna gain, distance towards human body, multiple transmitter information as presented by the applicant). In addition, maximum antenna gain or minimum distance towards the human body is calculated respectively, where relevant. The device meets the applicable FCC RF Exposure requirements based on available specifications for worst-case conditions at a minimum separation distance of 11 mm from the body. The device also meets the applicable ISED RSS-102 RF Exposure requirements based on available specifications for worst- case conditions at a minimum separation distance of 20 mm from the body. Company Name Product Description Model NexRev LLC Bluetooth LE Beacon Space Temperature & Humidity Sensor BT Compact Temp/RH Combo Report Authorized by: Responsible for testing Laboratory: 2026-03-31 Compliance Alvin, Ilarina (Director of EMC Services) Date Section Name Signature Responsible for the Report: 2026-03-31 Compliance Cheng Song (EMC Engineer) Date Section Name Signature The test results of this test report relate exclusively to the test item specified in Section3. CETECOM Inc. USA does not assume responsibility for any conclusions and generalizations drawn from the test results with regard to other specimens or samples of the type of the equipment represented by the test item. The test report may only be reproduced or published in full. Reproduction or publication of extracts from the report requires the prior written approval of CETECOM Inc. USA. Test Report #: EMC_NEXRE_006_25001_RF_Exposure_Rev2 FCC ID: 2BOOE-NEXUSTMPHUM Date of Report 2026-03-31 Page 4 of 9 IC: 33828-NEXUSTMPHUM 2 Administrative Data 2.1 Identification of the Testing Laboratory Issuing the EMC Test Report Company Name: CETECOM Inc. Department: Compliance Street Address: 411 Dixon Landing Road City/Zip Code Milpitas, CA 95035 Country USA Telephone: +1 (408) 586 6200 Fax: +1 (408) 586 6299 EMC Lab Manager: Alvin, Ilarina Responsible Project Leader: Shane Hao 2.2 Identification of the Client Client Firm/Name: NexRev LLC Street Address: 601 Development Dr. City/Zip Code Plano, TX 27281 Country USA 2.3 Identification of the Manufacturer Manufacturer’s Name: Same as Client Manufacturers Address: City/Zip Code Country Test Report #: EMC_NEXRE_006_25001_RF_Exposure_Rev2 FCC ID: 2BOOE-NEXUSTMPHUM Date of Report 2026-03-31 Page 5 of 9 IC: 33828-NEXUSTMPHUM 3 Equipment under Assessment 3.1 …

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IC recognized # 3462B CETECOM Inc. 411 Dixon Landing Road  Milpitas, CA 95035  U.S.A. Phone: + 1 (408) 586 6200  Fax: + 1 (408) 586 6299  E-mail: [email protected]  http://www.cetecom.com CETECOM Inc. is a Delaware Corporation with Corporation number: 2905571 © Copyright by CETECOM FCC / ISED Test Report For: NexRev LLC Model Name: BT Compact Temp/RH Combo Marketing Name: Nexus Bluetooth Compact Space Sensor Product Description: Bluetooth LE Beacon Space Temperature & Humidity Sensor FCC ID: 2BOOE-NEXUSTMPHUM IC: 33828-NEXUSTMPHUM Applied Rules and Standards: 47 CFR Part 15.247 (DTS) RSS-247 Issue 4 (DTS) & RSS-Gen Issue 5 REPORT #: EMC_NEXRE_006_25001_FCC_15_247_BTLE_Rev2 DATE: 2026-03-31 Test Report #: EMC_NEXRE_006_25001_FCC_15_247_BTLE_Rev2 FCC ID: 2BOOE-NEXUSTMPHUM Date of Report 2026-03-31 Page 2 of 50 IC: 33828-NEXUSTMPHUM TABLE OF CONTENTS 1 ASSESSMENT .............................................................................................................................................................. 3 2 ADMINISTRATIVE DATA ............................................................................................................................................... 4 2.1 IDENTIFICATION OF THE TESTING LABORATORY ISSUING THE EMC TEST REPORT ........................................................................... 4 2.2 IDENTIFICATION OF THE CLIENT ............................................................................................................................................. 4 2.3 IDENTIFICATION OF THE MANUFACTURER ................................................................................................................................. 4 3 EQUIPMENT UNDER TEST (EUT) ................................................................................................................................... 5 3.1 EUT SPECIFICATIONS ......................................................................................................................................................... 5 3.2 EUT POWER SETTING ......................................................................................................................................................... 5 3.1 EUT SAMPLE DETAILS ......................................................................................................................................................... 6 3.2 ACCESSORY EQUIPMENT (AE) DETAILS ................................................................................................................................... 6 3.3 TEST SAMPLE CONFIGURATION ............................................................................................................................................. 6 3.4 MODE OF OPERATION DETAILS .............................................................................................................................................. 6 3.5 JUSTIFICATION FOR WORST CASE MODE OF OPERATION ............................................................................................................ 6 4 SUBJECT OF INVESTIGATION ...................................................................................................................................... 7 5 MEASUREMENT RESULTS SUMMARY .......................................................................................................................... 7 6 MEASUREMENT UNCERTAINTY.................................................................................................................................... 8 6.1 ENVIRONMENTAL CONDITIONS DURING TESTING: ...................................................................................................................... 8 6.2 DATES OF TESTING: ............................................................................................................................................................ 8 6.3 DECISION RULE: ................................................................................................................................................................. 8 7 MEASUREMENT PROCEDURES .................................................................................................................................... 9 7.1 RADIATED MEASUREMENT .................................................................................................................................................... 9 7.2 POWER LINE CONDUCTED MEASUREMENT PROCEDURE .......................................................................................................... 13 7.3 RF CONDUCTED MEASUREMENT PROCEDURE ....................................................................................................................... 13 8 TEST RESULT DATA .................................................................................................................................................. 14 8.1 MAXIMUM PEAK CONDUCTED OUTPUT POWER ....................................................................................................................... 14 8.2 POWER SPECTRAL DENSITY ............................................................................................................................................... 17 8.3 BAND EDGE COMPLIANCE .................................................................................................................................................. 20 8.4 EMISSION BANDWIDTH 6DB AND 99% OCCUPIED BANDWIDTH ................................................................................................... 26 8.5 RADIATED TRANSMITTER SPURIOUS EMISSIONS AND RESTRICTED BANDS ................................................................................... 30 9 TEST SETUP PHOTOS ................................................................................................................................................ 49 10 TEST EQUIPMENT AND ANCILLARIES USED FOR TESTING ......................................…

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Application Note AN043 Small Size 2.4 GHz PCB antenna By Audun Andersen 1 KEYWORDS • CC25xx • CC24xx • CC2480 • PCB antenna • USB dongle • 2.4 GHz • Inverted F Antenna 2 INTRODUCTION The PCB antenna used on the CC2511 USB dongle reference design is described in this application note. Even if the antenna presented is for a USB dongle design it can be used in all 2.4 GHz designs, especially where small space is required for the antenna. This application note describes the antenna dimensions, the RF performance and considerations for complying with regulatory limits when using this design. The suggested antenna design requires no more than 15.2 x 5.7 mm of space and ensures a VSWR ratio of less than 2 across the 2.4 GHz ISM band when connected to a 50 ohm source. Figure 1: CC2511 USB Dongle SWRA117D Page 1 of 21 Application Note AN043 Table of Contents 1 KEYWORDS...................................................................................................................1 2 INTRODUCTION.............................................................................................................1 3 ABBREVIATIONS...........................................................................................................2 4 ANTENNA DESIGN........................................................................................................3 4.1 DESIGN GOALS..........................................................................................................3 4.2 SIMULATION...............................................................................................................3 4.3 LAYOUT AND IMPLEMENTATION...................................................................................4 5 TEST RESULTS.............................................................................................................5 5.1 REFLECTION..............................................................................................................5 5.2 RADIATION PATTERN..................................................................................................7 5.3 OUTPUT POWER......................................................................................................15 5.4 SPURIOUS EMISSION AND HARMONICS......................................................................17 6 CONCLUSION ..............................................................................................................20 7 GENERAL INFORMATION..........................................................................................21 7.1 DOCUMENT HISTORY................................................................................................21 3 ABBREVIATIONS CAD Computer Aided Design CC24xx CC2400, CC2420, CC2430 and CC2431 CC25xx CC2500, CC2510, CC2511, CC2550 and CC2520 CC2480 Z-Accel ZigBee Processor IFA Inverted F Antenna ISM Industrial, Scientific and Medical LOS Line Of Sight PCB Printed Circuit Board PER Packet Error Rate VSWR Voltage Standing Wave Ratio SWRA117D Page 2 of 21 Application Note AN043 4 ANTENNA DESIGN The PCB antenna on the CC2511 USB dongle reference design is a meandered Inverted F Antenna (IFA). The IFA was designed to match an impedance of 50 ohm at 2.45 GHz. Thus no additional matching components are necessary. 4.1 Design Goals The reflection at the feed point of the antenna determines how much of the applied power is delivered to the antenna. A reflection of less than -10 dB across the 2.4 GHz ISM band, when connected to a 50 ohm source, was a design goal. Reflection of less than -10 dB, or VSWR less than 2, ensures that more than 90% of the available power is delivered to the antenna. Bandwidth is in this document defined as the frequency band where more than 90% of the available power is delivered to the antenna. Another design goal was to fit the size of the PCB antenna on a USB dongle and to obtain good performance also when the dongle is connected to a computer. 4.2 Simulation IE3D from Zeland, which is an electromagnetic simulation tool, was used to design the antenna. The accuracy of the simulation is controlled by the mesh. An increase of the mesh increases the simulation time. Thus, for initial simulations mesh = 1 should be used. When a fairly good result is achieved a higher mesh should be used to obtain more accurate results. Comparison of simulation and measurement results shows that the measured reflection is between the result obtained with mesh = 5 and mesh = 1; see Figure 2 for details. Figure 2: Comparison of Simulation and Measurements Results SWRA117D Page 3 of 21 Application Note AN043 4.3 Layout and Implementation Small changes of the antenna dimensions may have large impact on the performance. Therefore it is strongly recommended to make an exact copy of the reference design to achieve optimum performance. The easiest way to implement the antenna is to import the gerber or DXF file showing the antenna layout. These files are named IFA_USB.spl and IFA_USB.dxf respectively and are included in the CC2511 USB dongle reference design available from http://www.ti.com\lpw. The imported file can be used as a template when drawing the antenna. By using this procedure it should be possible to make an exact copy. If the PCB CAD tool being used does not support import of DXF or gerber files, Figure 3 and Table 1 should be used to ensure correct implementation. It is recommended to generate a gerber file for comparison with IFA_USB.spl when making a manual implementation. Most gerber viewers have the possibility to import several gerber files at the same time. Thus by placing the gerber file, showing the manually implemented antenna, on top of IFA_USB.spl it is easy to verify that the antenna is correctly implemented. It is also recommended to use the same thickness and type of PCB material as used in the reference design. Information about the PCB can be found in a separate readme file included in the reference design. To compensate for a thicker/thinner P…

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