Jooyon TNS

(A2LA Cert. No. 7630.01) Revised 02/26/2026 Page 1 of 4 SCOPE OF ACCREDITATION TO ISO/IEC 17025:2017 JOOYON TNS Rm 701~706, Daemyung, Valeon, 10, Gyeongin-ro, 53ga-gil, Guro-gu Guro-gu, Seoul, Republic of Korea, 08214 South Korea Quan Hong Phone: +82 10-9038-1209 CALIBRATION Valid To: January 31, 2028 Certificate Number: 7630.01 In recognition of the successful completion of the A2LA evaluation process (including an assessment of the organization’s compliance with R205 – A2LA’s Calibration Program Requirements), accreditation is granted to this laboratory to perform the following calibrations 1, 3: I. Electrical- DC/Low Parameter/Equipment Range CMC2.4 (±) Comments DC Voltage – Measure (0 to 10) V (10 to 60) V 0.007 V 0.012 V Multimeter DC Current – Measure (0 to 3) A (3 to 30) A 0.0003 A 0.0075 A Multimeter Multimeter with current shunt DC Voltage – Source (0 to 10) V (10 to 20) V 0.003 V 0.008 V Power supply DC Current – Source (0 to 5) A (5 to 20) A 0.002 A 0.019 A Power supply

(A2LA Cert. No. 7630.01) Revised 02/26/2026 Page 2 of 4 II. Electrical- RF/Microwave Parameter/Range Frequency CMC2,4 (±) Comments RF Power – Measure Accuracy, Linearity, & Flatness (-60 to - 30) dBm (-30 to 20) dBm (-60 to - 30) dBm (-30 to 20) dBm (-60 to - 30) dBm (-30 to 20) dBm (-60 to - 30) dBm (-30 to 20) dBm 0.009 MHz to 8GHz (8 to 13) GHz (13 to 20) GHz (20 to 26.5) GHz 0.10 dB 0.12 dB 0.11 dB 0.13 dB 0.13 dB 0.15 dB 0.14 dB 0.16 dB Power Meter, Power Sensor, Signal Analyzer RF Power - Source Accuracy & Linearity (5 to 10) dBm (-20 to 5) dBm (5 to 10) dBm (-20 to 5) dBm (5 to 10) dBm (-20 to 5) dBm (5 to 10) dBm (-20 to 5) dBm (5 to 10) dBm (-20 to 5) dBm 10 MHz to 3 GHz (3 to 8) GHz (8 to 13) GHz (13 to 20) GHz (20 to 26.5) GHz 0.18 dB 0.10 dB 0.22 dB 0.16 dB 0.24 dB 0.18 dB 0.26 dB 0.20 dB 0.32 dB 0.26dB Signal generator Parameter/Equipment Range CMC2.4 (±) Comments Frequency Response – Source 10 MHz to 3GHz (3 to 10) GHz (10 to 20) GHz (20 to 26.5) GHz 0.14 dB 0.20 dB 0.21 dB 0.26 dB Power meter, power sensor, signal generator, power splitter

(A2LA Cert. No. 7630.01) Revised 02/26/2026 Page 3 of 4 Parameter/Range Frequency CMC2,4 (±) Comments Amplitude Modulation – Measure (10 to 99) % AM Depth CW: 2 MHz to 3.5 GHz Rate: 10 Hz to 100 kHz 1.5 % Signal analyzer Frequency Modulation – Measure (1 to 400) kHz FM Deviation CW: 2 MHz to 3.5 GHz, Rate: 10 Hz to 50 kHz 1.8 % Signal analyzer Parameter/Equipment Range CMC2,4 (±) Comments Harmonics Level –Measure 2nd Harmonics 100 kHz to 13.5 GHz 1.5 dB Signal analyzer Average Noise Level – Measure 10 MHz to 1 GHz (1 to 6) GHz (6 to 13.5) GHz (6 to 12) GHz (12 to 20) GHz (20 to 26.5) GHz 1.0 dB 2.5 dB 3.5 dB 4.0 dB 4.5 dB 5.0 dB Load

(A2LA Cert. No. 7630.01) Revised 02/26/2026 Page 4 of 4 III. Time & Frequency Parameter/Equipment Range CMC2 (±) Comments Frequency Accuracy – Measure 10 Hz to 10 MHz 10 MHz to 26.5 GHz 2.2x10 −7 Hz/Hz 2.17x10−7 Hz/Hz Microwave counter Frequency Accuracy – Source 10 MHz to 26.5 GHz 2.2x10 −7 Hz/Hz Signal generator ________________________________________ 1 This laboratory offers commercial calibration service. 2 Calibration and Measurement Capability Uncertainty (CMC) is the smallest uncertainty of measurement that a laboratory can achieve within its scope of accreditation when performing more or less routine calibrations of nearly ideal measurement standards or nearly ideal measuring equipment. CMCs represent expanded uncertainties expressed at approximately the 95 % level of confidence, usually using a coverage factor of k = 2. The actual measurement uncertainty of a specific calibration performed by the laboratory may be greater than the CMC due to the behavio r of the customer’s device and to influences from the circumstances of the specific calibration. 3 This scope meets A2LA’s P112 Flexible Scope Policy. 4 In the statement of CMC, percentages are percentage of reading, unless otherwise indicated.