QOQ-GM270SBluetooth Low Energy (LE), and 802.15.4 Wireless Radio Module

TÜV SÜD is a trading name of TUV SUD Ltd Registered in Scotland at East Kilbride, Glasgow G75 0QF, United Kingdom Registered number: SC215164 TUV SUD Ltd is a TÜV SÜD Group Company Phone: +44 (0) 1489 558100 Fax: +44 (0) 1489 558101 www.tuvsud.com/en TÜV SÜD Octagon House Concorde Way Fareham Hampshire PO15 5RL United Kingdom TÜV SÜD Roxtra 328983 DIVPS Main V4 SIGNATURE NAME JOB TITLE RESPONSIBLE FOR ISSUE DATE Steve Marshall Senior Engineer Authorised Signatory 08 September 2025 Signatures in this approval box have checked this document in line with the requirements of TÜV SÜD document control rules. RESPONSIBLE FOR NAME DATE SIGNATURE Testing Thomas Biddlecombe 08 September 2025 Mohiuddin Mohammed 08 September 2025 FCC Accreditation: 492497/UK2010 Octagon House, Fareham Test Laboratory ISED Accreditation: 12669A/UK0003 Octagon House, Fareham Test Laboratory EXECUTIVE SUMMARY / ENGINEERING STATEMENT The measurements shown in this report were made in accordance with the procedures described on the test pages A sample of this product was tested to demonstrate limited compliance with FCC 47 CFR Part 15C: 2023, ISED RSS-247: Issue 3 (2023-08) and ISED RSS-GEN: Issue 5 (2018-04) + A2 (2021-02) for the tests detailed in section 1.3. The sample tested was found to comply with the requirements defined in the applied rules. FCC and ISED Test Report Silicon Laboratories Finland Oy Main Model: MGM270S22A Series Model: BGM270S22A In accordance with FCC 47 CFR Part 15C and ISED RSS-247 and ISED RSS-GEN Technology: (2.4 GHz Bluetooth Low Energy) Prepared for: Silicon Laboratories Finland Oy Bertel Jungin Aukio 3 Alberga Business Park 02600 Espoo Finland FCC ID: QOQ-GM270S IC: 5123A-GM270S COMMERCIAL-IN-CONFIDENCE Document 75965039-04 Issue 01 DISCLAIMER AND COPYRIGHT This non-binding report has been prepared by TÜV SÜD with all reasonable skill and care. The document is confidential to the potential Client and TÜV SÜD. No part of this document may be reproduced without the prior written approval of TÜV SÜD. © 2025 TÜV SÜD. This report relates only to the actual item/items tested. ACCREDITATION Our UKAS Accreditation does not cover opinions and interpretations and any expressed are outside the scope of our UKAS Accreditation. Results of tests not covered by our UKAS Accreditation Schedule are marked NUA (Not UKAS Accredited). Results of tests covered by our Flexible UKAS Accreditation Schedule are marked FS (Flexible Scope). Document 75965039-04 Issue 01 COMMERCIAL-IN-CONFIDENCE COMMERCIAL-IN-CONFIDENCE Page 1 of 100 Contents 1 Report Summary .........................................................................................................................2 1.1 Report Modification Record ...........................................................................................................2 1.2 Introduction ....................................................................................................................................2 1.3 Brief Summary of Results .............................................................................................................3 1.4 Customer Supplied Form ..............................................................................................................4 1.5 Product Information .......................................................................................................................8 1.6 Deviations from the Standard ........................................................................................................8 1.7 EUT Modification Record ..............................................................................................................8 1.8 Test Location .................................................................................................................................9 2 Test Details ............................................................................................................................... 10 2.1 Emission Bandwidth ................................................................................................................... 10 2.2 Maximum Conducted Output Power .......................................................................................... 27 2.3 Power Spectral Density .............................................................................................................. 33 2.4 Restricted Band Edges............................................................................................................... 37 2.5 Authorised Band Edges ............................................................................................................. 46 2.6 Spurious Radiated Emissions .................................................................................................... 52 3 Photographs ............................................................................................................................. 94 3.1 Test Setup Photographs ............................................................................................................ 94 4 Measurement Uncertainty ..................................................................................................... 100 Document 75965039-04 Issue 01 COMMERCIAL-IN-CONFIDENCE COMMERCIAL-IN-CONFIDENCE Page 2 of 100 1 Report Summary 1.1 Report Modification Record Alterations and additions to this report will be issued to the holders of each copy in the form of a complete document. Issue Description of Change Date of Issue 01 First version 08 September 2025 Table 1 1.2 Introduction Applicant Silicon Laboratories Finland Oy Manufacturer Silicon Laboratories Finland Oy Model Number(s) Main Model: MGM270S22A Series Model: BGM270S22A Serial Number(s)* xGM270S_S1; xGM270S_S2; xGM270S_S4. xGM270S_S7 & xGM270S_S8 Hardware Version(s) 1.0 Software Version(s) Simplicity SDK Suite v2025.6.0 Number of Samples Tested 5 Test Specification/Issue/Date FCC 47 CFR Part 15C: 2023 ISED RSS-247: Issue …

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P a g e 1 | 6 GM270S Integral Antenna Data Sheet This document provides the specification of the integral antenna designed in the Bluetooth Low Energy (LE) and 802.15.4 wireless radio modules with model names of MGM270S22A and BGM270S22A, and having brand name of SILICON LABS. Antenna type: Ground Loop realized by a PCB Trace Design Manufacturer: Silicon Laboratories Finland Oy Address: Alberga Business Park, Bertel Jungin aukio 3, 02600 Espoo, Finland - Web: https://www.silabs.com/ Contents 1. Overview ................................................................................................................................................. 2 2. Antenna Specification ......................................................................................................................... 2 3. Gain, Efficiency, and Radiation Patterns ....................................................................................... 3 P a g e 2 | 6 1. Overview The integral antenna of the wireless radio modules with model names of MGM270S22A and BGM270S22A is a partitioned ground loop type antenna realized by a PCB trace design. The part which is internal to the module is the replacement to the typical embedded ceramic chip antenna: it acts as the 2.4GHz resonator, and it is comprised of traces, discrete chip components, and their distributed parasitic, within a controlled substrate. This antenna relies on an external loop trace, acting as the reflector being designed in host board, and on the ground plane of such host board. See the user manual / datasheet of the modules, in particular Chapter 7, “Design Guidelines”, for the detailed requirements concerning the host part. The embedded antenna is not commercially available: it is only intended for use as the self-contained integral antenna of the above-mentioned radio modules. The integral antenna itself is identified as follows: Model name: GM270S Brand name: SILICON LABS Manufacturer: Silicon Laboratories Finland Oy Address: Alberga Business Park, Bertel Jungin aukio 3, 02600 Espoo, Finland 2. Antenna Specification Antenna Parameter Symbol Min Typ Max Unit Frequency range F RANGE 2402 - 2480 MHz Gain (relative to isotropic) G MAX - - +1.74 dBi Efficiency Efficiency -2.5 - -1.79 dB Reference impedance Z - 50 - Ω Dielectric constant of host board DI CONST - 4.3 - - VSWR VSWR - - 2:1 - Trace width (of the embedded resonator) T THICKNESS - 150 - μm Trace length (of the embedded resonator) T LENGTH - 6.3 - mm Table 1: Antenna Specification Note: This integral antenna meets the specifications in the table above if the host board is designed so that it takes into account the guidance and constraints stipulated in the user manual / datasheet of the module(s), with particular regard to the design guidelines section for host boards. P a g e 3 | 6 3. Gain, Efficiency, and Radiation Patterns Figure 1: Integral Antenna Gain Table 2: Integral Antenna Efficiency P a g e 4 | 6 Figure 2: Integral Antenna Efficiency Plot Table 3: Integral Antenna Efficiency P a g e 5 | 6 Figure 3: Integral Antenna Radiation Pattern Phi 0° Figure 4: Integral Antenna Radiation Pattern Phi 90° P a g e 6 | 6 Figure 5: Integral Antenna Radiation Pattern Theta 90° 3.1 Note on the peak gain, efficiency, and radiation patterns (gain cuts) Figures 1 to 5 depict measurements performed on manufacturer’s behalf by a third-party independent lab, as follows: Name: Sasken Finland Oy (part of Sasken Technologies Ltd.) Address: Vissavedentie 1, FI-69600 Kaustinen, Finland (Web: https://www.sasken.com/fi/) Testing Date / Operator: June 24, 2025 / Aki Myllymäki Test Equipment: - Model Name / Description: Satimo SG 64 / Multi-probe system for the most accurate solution in testing antennas and wireless devices, particularly developed to measure stand- alone antennas or antennas integrated in subsystems - Manufacturer: Satimo (part of Microwave Vision Group) - Software name and version: WaveStudio 24.3.3 - Configuration: Probe Array Controller (PAC, 0.4-6.0 GHz) for passive measurements - Calibration date: March 6, 2025 / Validity: 1 year / Sasken internal calibration check March 6, 2025 / Validity: 2 years / Full system calibration - Calibration info: Reference point: end of antenna feed cable on antenna mast Reference antenna: Dual-Ridge Horn antenna SH400/S#0040, 0.4-6.0 GHz Extra Notes: Additional details of the test setup and measurements are in the separate report by the independent lab, which can be provided upon request if/when applicable. Refer to the PCB Layout and Schematic documents, provided separately upon request if/when applicable, for a confidential view of the trace connecting the components and for the specification of these components. The MGM270S22A and BGM270S22A models, hosting the integrated antenna portion, are identical in hardware, and their only difference is in the wireless protocol stacks supported in the firmware.

EVERY CONNECTION COUNTS ANT-2.4-CW-CT-xxx © 2025 TE Connectivity.Confidential & Proprietary. Do not reproduce or distribute externally including non-authorized representatives and distributors. Create a sustainable future by limiting print copies, and recycling paper. ANT-2.4-CW-CT-xxx Radiation Patterns at Center of Jig #51 2 PwrSumH (θ = 90°)E1 (Φ = 90°)E2 (Φ = 90°) No.Frequency Efficiency % Avg. Gain dBiPeak Gain dBiθ (°)Φ (°)Avg. Gain dBiPeak Gain dBiΦ (°)Avg. Gain dBiPeak Gain dBiΦ (°)Avg. Gain dBiPeak Gain dBiΦ (°) 12370.00053.86-2.692.39150.00280.00-3.780.83340.00-1.03-0.160.00-3.652.33-150.00 22400.00053.88-2.692.12150.00270.00-3.840.73340.00-0.970.0415.00-3.662.12-150.00 32450.00064.72-1.992.76150.00255.00-2.991.51210.00-0.310.69-135.00-3.102.26-150.00 42500.00060.66-2.172.29150.00240.00-3.321.30210.00-0.690.71-135.00-3.481.32-150.00 52530.00059.15-2.282.29150.00240.00-3.501.07205.00-0.870.67-135.00-3.610.78-150.00 © 2025 TE Connectivity. Confidential & Proprietary. Do not reproduce or distribute externally including non-authorized representatives and distributors. Create a sustainable future by limiting print copies, and recycling paper. Chamber Setup 3 ANY CONNECTION CAN CHANGE THE WORLD EVERY CONNECTION COUNTS

4.4 113 0.35 9.0 0.7920.0 0.35 9.0 0.39 10.0 0.197 5.00 COLOR BANDS ALL DIMENSIONS ARE IN MM [INCHES].1. ALL MATERIALS PRODUCT AND PROCESSES MUST MEET REQUIREMENT OF 2. TE CONNECTIVITY ENVIRONMENTAL STANDARD TEC-138-702 CONTAINTS NO BANNED OR RESTRICTED SUBSTANCES. NO REACH SVHC SHALL BE CONTAINED ABOVE THE TRESHOLD AS DEFINED IN 3. REACH SVHC COMPLIANCE DEFINITION IN ANNEX "A" OF TEC-138-702. ELECTRICAL DATA SHOWN FOR REFERANCE ONLY.4. FREQUENCY: SEE TABLE1. MAX POWER: 5W2. OMNIDIRECTIONAL3. 1/2 WAVE TYPE4. DIPOLE TYPE5. IMPEDANCE: 50Ω6. VSWR <1.9 TYP @ CENTER7. ANTENNA QUALIFIED ON 4" X 4" COPPER CLAD GROUND PLANE IAW 108 5. INTERNAL TEST DOCUMENT AT LATEST REVISION. MECHANICAL :6. INTERFACE: SMA TYPE IAW [MIL-STD-348B] RP-SMA INTERCONENCT 1. INTENDED TO MATE WITH OTHER SMA CONNECTIONS MEETING PART15 OF FCC SPECIFICATION. OPERATING AND STORAGE TEMPERATURE: -20ºC - +65ºC2. HUMIDITY: 10-80% RH3. COLOR BANDS: PINK TO INDICATE 2.4GHZ RADIATING CONDITION4. REV DESCRIPTION DATEDWNAPVD ACUSTOMER DRAWING 11/10/2023JHCM ITEM NUMBERCONNECTOR L9000017-01SMA L9000016-01RP-SMA DIMENSIONS: 0 PLC 1 PLC 2 PLC 3 PLC 4 PLC ANGLES DD C B A C B A 4 321 OF SCALESHEETREV NAME SIZECAGE CODEDRAWING NO TOLERANCES UNLESS OTHERWISE SPECIFIED: DWN CHK APVD MATERIALFINISH REVISIONS 2022 TE Connectivity. a TE Connectivity Ltd. company. All Rights Reserved. PRODUCT SPEC APPLICATION SPEC WEIGHT RESTRICTED TO THIS DRAWING IS A CONTROLLED DOCUMENT. TE Connectivity 1470-19 (3/13) 1:1 1 1 mm 3. 1.0 0.50 11/10/23 11/10/23 11/10/23 108-161079 - 11.0g 30' ANTENNA 1/2 WAVE CW-CT WHIP 2.4 GHZ SMA AND RP-SMA 00779 ANT-2.4-CW-CT-CCC - C A3 A JHAGER CLEWIS CMURPHY - BRASS UV-PU CUSTOMER DRAWING

– 1 – Revised 11/22/13 Product Description The CT Series ½-wave 2.4GHz antenna delivers outstanding performance in a rugged and cosmetically-attractive package. The antenna’s internal counterpoise eliminates external ground plane dependence and maximizes performance. CT Series antennas attach using a standard SMA or Part 15 compliant RP-SMA connector, though alternate connectors and custom colors are available for volume OEM customers. Features sInternal counterpoise sExcellent performance sOmni-directional pattern sVery low VSWR sFully weatherized sRugged and damage-resistant sStandard SMA or Part 15 compliant RP-SMA connector (OHFWULFDO6SHFLĬFDWLRQV Center freq. 2.45GHz Bandwidth: 150MHz Wavelength: ½-wave Peak Gain: 2.8dBi VSWR: <1.9 typ. at center Impedance: 50-ohms Connector: RP-SMA or SMA Oper. Temp. Range: –40°C to +90°C Electrical specifications and plots measured on 10.16 cm x 1016 cm (4.00" x 4.00") reference ground plane ANT-2.4-CW-CT-xxx Data Sheet by Ordering Information ANT-2.4-CW-CT-RPS (with RP-SMA connector) ANT-2.4-CW-CT-SMA (with SMA connector) (0.35”) 9.0 mm (0.39”) 10.0 mm (0.79”) 20.0 mm 84.0 mm (3.31”) (4.44”) 113.0 mm – 2 – by Data Sheet ANT-2.4-CW-CT VSWRReflected Power 3:1 2:1 1:1 25% 11% 0% 2.45GHz2.55GHz2.35GHz 1.113 VSWR Graph What is VSWR? The Voltage Standing Wave Ratio (VSWR) is a measurement of how well an antenna is matched to a source impedance, typically 50-ohms. It is calculated by measuring the voltage wave that is headed toward the load versus the voltage wave that is reflected back from the load. A perfect match will have a VSWR of 1:1. The higher the first number, the worse the match, and the more inefficient the system. Since a perfect match cannot ever be obtained, some benchmark for performance needs to be set. In the case of antenna VSWR, this is usually 2:1. At this point, 88.9% of the energy sent to the antenna by the transmitter is radiated into free space and 11.1% is either reflected back into the source or lost as heat on the structure of the antenna. In the other direction, 88.9% of the energy recovered by the antenna is transferred into the receiver. As a side note, since the “:1” is always implied, many data sheets will remove it and just display the first number. How to Read a VSWR Graph VSWR is usually displayed graphically versus frequency. The lowest point on the graph is the antenna’s operational center frequency. In most cases, this will be different than the designed center frequency due to fabrication tolerances. The VSWR at that point denotes how close to 50-ohms the antenna gets. Linx specifies the recommended bandwidth as the range where the typical antenna VSWR is less than 2:1. 159 Ort Lane, Merlin, OR, US 97532 Phone: +1 541 471 6256 Fax: +1 541 471 6251 www.linxtechnologies.com te.com TE Connectivity, TE, TE connectivity (logo), Linx and Linx Technologies are trademarks owned or licensed by the TE Connectivity Ltd. family of companies. All other logos, pr oducts and/or company names ref erred to herein might be trademarks of their respective owners. The information given herein, including drawings, illustr ations and schematics which are intended for illustr ation purposes only, is believed to be reliable. However , TE Connectivity makes no warranties as to its accurac y or completeness and disclaims any liability in connection with its use. TE Connectivity‘s obligations shall only be as set forth in TE Connectivity‘s Standard Terms and Conditions of Sale for this product and in no case will TE Connectivity be liable for any incidental, indirect or consequential damages arising out of the sale, r esale, use or misuse of the product. Users of TE Connectivity products should make their own evaluation to determine the suitability of each such product for the specific application. TE Connectivity warrants to the original end user customer of its products that its products are free from defects in material and workmanship. Subject to conditions and limitations TE Connectivity will, at its option, either repair or replace any part of its products that prove defective because of improper workmanship or materials. This limited warranty is in for ce for the useful lifetime of the original end product into which the TE Connectivity product is installed. Useful lifetime of the original end product may vary but is not warrantied to exceed one (1) year from the original date of the end product purchase. ©2023 TE Connectivity. All Rights Reserved. 06/23 Original USA: +1 (800) 522-6752 Canada: +1 (905) 475-6222 Mexico: +52 (0) 55-1106-0800 La tin/S. America: +54 (0) 11-4733-2200 Germany: +49 (0) 6251- 133-1999 UK: +44 (0) 800-267666 Fr ance: +33 (0) 1-3420-8686 Netherlands: +31 (0) 73-6246-999 China: +86 (0) 400-820-6015 TE TECHNICAL SUPPORT CENTER

Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 61 of 77 Figure 72 - Top _802.15.4_2480 MHz, 30 MHz to 1 GHz, Vertical (Peak) Y- Orientation Figure 73 - Top _802.15.4_2480 MHz, 1 GHz to 26 GHz, Vertical (Peak) Y- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 62 of 77 Frequency (MHz) Level (dBμV/m) Limit (dBμV/m) Margin (dB) Detector Angle (°) Height (cm) Polarisation 12027.645 52.20 54.00 -1.80 RMS 292 226 Horizontal Table 42 - Bottom_ 802.15.4_2405 MHz, 30 MHz to 26 GHz Z -Orientation No other emissions found within 10 dB of the limit. Figure 74 - Bottom _802.15.4_2405 MHz, 30 MHz to 1 GHz, Horizontal (Peak) Z- Orientation Figure 75 - Bottom _802.15.4_2405 MHz, 1 GHz to 26 GHz, Horizontal (Peak) Z- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 63 of 77 Figure 76 - Bottom _802.15.4_2405 MHz, 30 MHz to 1 GHz, Vertical (Peak) Z- Orientation Figure 77 - Bottom _802.15.4_2405 MHz, 1 GHz to 26 GHz, Vertical (Peak) Z- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 64 of 77 Frequency (MHz) Level (dBμV/m) Limit (dBμV/m) Margin (dB) Detector Angle (°) Height (cm) Polarisation 12222.206 50.37 54.00 -3.63 RMS 292 239 Horizontal Table 43 - Middle_ 802.15.4_2445 MHz, 30 MHz to 26 GHz Z -Orientation No other emissions found within 10 dB of the limit. Figure 78 - Middle_802.15.4_2445 MHz, 30 MHz to 1 GHz, Horizontal (Peak) Z- Orientation Figure 79 - Middle _802.15.4_2445 MHz, 1 GHz to 26 GHz, Horizontal (Peak) Z- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 65 of 77 Figure 80 - Middle _802.15.4_2485 MHz, 30 MHz to 1 GHz, Vertical (Peak) Z- Orientation Figure 81 - Middle _802.15.4_2445 MHz, 1 GHz to 26 GHz, Vertical (Peak) Z- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 66 of 77 Frequency (MHz) Level (dBμV/m) Limit (dBμV/m) Margin (dB) Detector Angle (°) Height (cm) Polarisation * Table 44 - Top_ 802.15.4_2480 MHz, 30 MHz to 26 GHz Z -Orientation *No emissions found within 10 dB of the limit. Figure 82 - Top_802.15.4_2480 MHz, 30 MHz to 1 GHz, Horizontal (Peak) Z- Orientation Figure 83 - Top _802.15.4_2480 MHz, 1 GHz to 26 GHz, Horizontal (Peak) Z- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 67 of 77 Figure 84 - Top _802.15.4_2480 MHz, 30 MHz to 1 GHz, Vertical (Peak) Z- Orientation Figure 85 - Top _802.15.4_2480 MHz, 1 GHz to 26 GHz, Vertical (Peak) Z- Orientation Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 68 of 77 FCC 47 CFR Part 15, Limit Clause 15.247 (d) In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated intentional radiator is operating, the radio frequency power that is produced by the intentional radiator shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of RMS averaging over a time interval, as permitted under paragraph (b)(3) of this section, the attenuation required under this paragraph shall be 30 dB instead of 20 dB. Attenuation below the general limits specified in § 15.209(a) is not required. In addition, radiated emissions which fall in the restricted bands, as defined in § 15.205(a), must also comply with the radiated emission limits specified in 15.209(a) ISED RSS-247, Limit Clause 5.5 In any 100 kHz bandwidth outside the frequency band in which the spread spectrum or digitally modulated device is operating, the RF power that is produced shall be at least 20 dB below that in the 100 kHz bandwidth within the band that contains the highest level of the desired power, based on either an RF conducted or a radiated measurement, provided that the transmitter demonstrates compliance with the peak conducted power limits. If the transmitter complies with the conducted power limits based on the use of root-mean-square averaging over a time interval, as permitted under Section 5.4(4), the attenuation required shall be 30 dB instead of 20 dB. Attenuation below the general field strength limits specified in RSS-Gen is not required. In addition, radiated emissions which fall in the restricted bands, as defined in RSS-GEN, clause 8.10, must also comply with the radiated emission limits specified in RSS-GEN clause 8.9. Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 69 of 77 2.6.8 Test Location and Test Equipment Used This test was carried out in RF Chamber 11. Instrument Manufacturer Type No TE No Calibration Period (months) Calibration Expires Antenna (DRG, 18 GHz to 40 GHz) Link Microtek Ltd AM180HA-K-TU2 230 24 08-Oct-2026 Dual Power Supply Unit Hewlett Packard 6253A 271 - O/P Mon Antenna (Bilog with attenuator, 30 MHz to 3 GHz) Schaffner CBL6143 287 24 29-Aug-2026 True RMS Multimeter Fluke 79 Series III 411 12 09-Jan-2026 Pre-Amplifier (18 GHz to 40 GHz) Phase One PSO4-0087 1534 12 16-Aug-2025 Hygrometer Rotronic I-1000 3220 12 02-Dec-2025 EXA Signal Analyser Keysight Technologies N9010B 4969 24 07-Feb-2026 Band Reject Filter - 2.425 GHz Wainwright WRCGV14-2390- 2400-2450-2460- 50SS 5067 12 14-Oct-2025 Band Reject Filter - 2.4585 GHz Wainwright WRCGV14-2423.5- 2433.5-2483.5- 2493.5-50SS 5069 12 07-Nov-2025 Test Receiver Rohde & Schwarz ESW44 5084 12 13-Dec-2025 Emissions Software TUV SUD EmX V3.5.3 5125 - Software 3m Semi-Anechoic Chamber Rainford RF Chamber 11 5136 36 14-Nov-2027 Mast Maturo TAM 4.0-P 5158 - TU Mast and Turntable Controller Maturo Maturo NCD 5159 - TU Turntable Maturo TT 15WF 5160 - TU Antenna (DRG, 1 GHz to 10.5 GHz) Schwarzbeck BBHA9120B 5215 12 05-Jul-2026 Pre-Amplifier (1 GHz to 18 GHz) Schwarzbeck BBV 9718 C 5350 12 16-Dec-2025 Cable 2.92m Junkosha MWX241-01000KMS 5412 12 06-Jun-2026 Cable 2.92m Junkosha MWX241-01000KMS 5413 12 …

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TÜV SÜD is a trading name of TUV SUD Ltd Registered in Scotland at East Kilbride, Glasgow G75 0QF, United Kingdom Registered number: SC215164 TUV SUD Ltd is a TÜV SÜD Group Company Phone: +44 (0) 1489 558100 Fax: +44 (0) 1489 558101 www.tuvsud.com/en TÜV SÜD Octagon House Concorde Way Fareham Hampshire PO15 5RL United Kingdom TÜV SÜD Roxtra 328983 DIVPS Main V4 SIGNATURE NAME JOB TITLE RESPONSIBLE FOR ISSUE DATE Steve Marshall Senior Engineer Authorised Signatory 08 September 2025 Signatures in this approval box have checked this document in line with the requirements of TÜV SÜD document control rules. RESPONSIBLE FOR NAME DATE SIGNATURE Testing Thomas Biddlecombe 08 September 2025 Mohiuddin Mohammed 08 September 2025 FCC Accreditation: 492497/UK2010 Octagon House, Fareham Test Laboratory ISED Accreditation: 12669A/UK0003 Octagon House, Fareham Test Laboratory EXECUTIVE SUMMARY / ENGINEERING STATEMENT The measurements shown in this report were made in accordance with the procedures described on the test pages A sample of this product was tested to demonstrate limited compliance with FCC 47 CFR Part 15C: 2023, ISED RSS-247: Issue 3 (2023-08) and ISED RSS-GEN: Issue 5 (2018-04) + A2 (2021-02) for the tests detailed in section 1.3. The sample tested was found to comply with the requirements defined in the applied rules. FCC and ISED Test Report Silicon Laboratories Finland Oy Main Model: MGM270S22A In accordance with FCC 47 CFR Part 15C and ISED RSS-247 and ISED RSS-GEN Technology: (IEEE 802.15.4) Prepared for: Silicon Laboratories Finland Oy Bertel Jungin Aukio 3 Alberga Business Park 02600 Espoo Finland FCC ID: QOQ-GM270S IC: 5123A-GM270S COMMERCIAL-IN-CONFIDENCE Document 75965039-05 Issue 01 DISCLAIMER AND COPYRIGHT This non-binding report has been prepared by TÜV SÜD with all reasonable skill and care. The document is confidential to the potential Client and TÜV SÜD. No part of this document may be reproduced without the prior written approval of TÜV SÜD. © 2025 TÜV SÜD. This report relates only to the actual item/items tested. ACCREDITATION Our UKAS Accreditation does not cover opinions and interpretations and any expressed are outside the scope of our UKAS Accreditation. Results of tests not covered by our UKAS Accreditation Schedule are marked NUA (Not UKAS Accredited). Results of tests covered by our Flexible UKAS Accreditation Schedule are marked FS (Flexible Scope). Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 1 of 77 Contents 1 Report Summary .........................................................................................................................2 1.1 Report Modification Record ...........................................................................................................2 1.2 Introduction ....................................................................................................................................2 1.3 Brief Summary of Results .............................................................................................................3 1.4 Customer Supplied Form ..............................................................................................................4 1.5 Product Information .......................................................................................................................7 1.6 Deviations from the Standard ........................................................................................................7 1.7 EUT Modification Record ..............................................................................................................7 1.8 Test Location .................................................................................................................................8 2 Test Details ..................................................................................................................................9 2.1 Emission Bandwidth ......................................................................................................................9 2.2 Maximum Conducted Output Power .......................................................................................... 15 2.3 Power Spectral Density .............................................................................................................. 18 2.4 Restricted Band Edges............................................................................................................... 21 2.5 Authorised Band Edges ............................................................................................................. 26 2.6 Spurious Radiated Emissions .................................................................................................... 30 3 Photographs ............................................................................................................................. 71 3.1 Test Setup Photographs ............................................................................................................ 71 4 Measurement Uncertainty ....................................................................................................... 77 Document 75965039-05 Issue 01 COMMERCIAL-IN-CONFIDENCE Page 2 of 77 1 Report Summary 1.1 Report Modification Record Alterations and additions to this report will be issued to the holders of ea…

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