QF7NX0410GPR Compass NX NX04/10

NX04/10 Antenna User Guide MN73-xxx Rev A Geophysical Survey Systems, Inc. 40 Simon Street www.geophysical.com • [email protected] Nashua, NH 03060-3075 Copyright © 2026 Geophysical Survey Systems, Inc. All rights reserved including the right of reproduction in whole or in part in any form Published by Geophysical Survey Systems, Inc. 40 Simon Street Nashua, NH 03060-3075 USA GSSI, Flex NX, Nexus, GSSI Fusion, RADAN, SIR, UtilityScan, PaveScan RDM are registered trademarks of Geophysical Survey Systems, Inc. Limited Warranty, and Limitations of Liability and Restrictions Geophysical Survey Systems, Inc. hereinafter referred to as GSSI, warrants that for a period of 24 months from the delivery date to the original purchaser this product will be free from defects in materials and workmanship. EXCEPT FOR THE FOREGOING LIMITED WARRANTY, GSSI DISCLAIMS ALL WARRANTIES, EXPRESS OR IMPLIED, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE. GSSI's obligation is limited to repairing or replacing parts or equipment which are returned to GSSI, transportation and insurance pre-paid, without alteration or further damage, and which in GSSI's judgment were defective or became defective during normal use. GSSI ASSUMES NO LIABILITY FOR ANY DIRECT, INDIRECT, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES OR INJURIES CAUSED BY PROPER OR IMPROPER OPERATION OF ITS EQUIPMENT, WHETHER OR NOT DEFECTIVE. Before returning any equipment to GSSI, a Return Material Authorization (RMA) number must be obtained. Please call the GSSI Customer Service Manager who will assign an RMA number. Be sure to have the serial number of the unit available. Regulatory Information The use of GSSI antennas is governed by different regulatory agencies around the world. Specific antenna models must be certified for legal operation in your country. Please read and understand the following regulatory passages that pertain to your antenna. A listing of certified antennas by region can be found at www.geophysical.com/regulatoryinformation.htm. Notice This device contains license-exempt transmitter(s)/receiver(s) that comply with Innovation, Science and Economic Development [ISED] Canada’s license-exempt RSS(s). Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference, including interference that may cause undesired operation of the device. Garantie limitée, limites de responsabilité et restrictions Geophysical Survey Systems, Inc, ci-après dénommé GSSI, garantit à l'acheteur original de ce produit que, pendant une période de 24 mois à compter de la date de livraison, ce dernier sera exempt de défauts de matériaux et de fabrication. EXCEPTE POUR CETTE GARANTIE LIMITÉE, GSSI REJETTE TOUTE GARANTIE, EXPLICITE OU IMPLICITE, Y COMPRIS TOUTE GARANTIE DE QUALITE MARCHANDE OU D'ADEQUATION A UN USAGE PARTICULIER. L’obligation de GSSI est limitée à la réparation ou le remplacement de pièces ou équipements qui sont retournés à GSSI, transport et assurance prépayés, sans altération ni d'autres dommages, et qui, d’après GSSI, étaient défectueux ou sont devenus défectueux lors d’une utilisation normale. GSSI N'ASSUME AUCUNE RESPONSABILITE POUR LES DOMMAGES DIRECTS, INDIRECTS, SPÉCIAUX, INCIDENTS OU CONSEQUENTS OU BLESSURES CAUSEES PAR UNE BONNE OU MAUVAISE UTILISATION DE SON EQUIPEMENT DÉFECTUEUX OU NON. Avant de retourner tout équipement à GSSI, une autorisation de retour matériel (RMA) doit être obtenue. Appelez s'il vous plaît le service clientèle GSSI qui attribuera un numéro de RMA. Soyez sûr d'avoir le numéro de série de l'unité. Informations réglementaires L'utilisation des antennes GSSI est régie par différents organismes de réglementation à travers le monde. Certains modèles d'antenne spécifiques doivent être certifiés pour un fonctionnement légal dans votre pays. Merci de lire et comprendre les passages suivants de réglementation qui s'appliquent à votre antenne. Une liste des antennes certifiées par région peut être trouvée sur www.geophysical.com/ regulatoryinformation.htm. Avis Cet appareil contient des émetteurs/récepteurs exempts de licence qui sont conformes aux Spécifications sur les normes radioélectriques exemptes de licence d'Innovation, Sciences et Développement économique Canada. Son fonctionnement est soumis aux deux conditions suivantes : (1) cet appareil ne doit pas causer d'interférences nuisibles, et (2) cet appareil doit accepter toute interférence, y compris les interférences susceptibles de provoquer un fonctionnement indésirable de l'appareil. Canadian Emissions Requirements This Class A digital apparatus complies with Canadian ICES-003. Cet appareil numerique de la classe A est conforme a la norme NMB-003 du Canada GPR UWB Compliance Notice The FCC has granted Geophysical Survey Systems, Inc a waiver of sections 15.503(d), 15.31(c) and 15.521(d) rules, certifying the NX04/10 antenna for GPR UWB transmission. This action was adopted and released by the Chief of the Office of Engineering and Technology (OET) on 31 July 2023 and is described in waiver DA 23-650. This waiver is subject to the following conditions: 1. The GSSI GPR device was certified by an authorized Telecommunications Certification Body. A copy of Waiver DA 23-650 was submitted with the application for certification. 2. The NX04/10 antenna operates with stepped frequency CW modulation in 1-40 MHz steps between 30-6000 MHz. 3. The NX04/10 antenna dwell time on any one frequency does not exceed 2 microseconds. 4. The dwell time during any NX04/10 antenna frequency step does not exceed 0.04 percent of the device’s minimum scan/cycle rate. 5. For certification testing, the measurement of emissions from the NX04/10 antenna was conducted with the stepping function active for all possible frequency step sizes. 6. The NX04/10 antenna complies with all other technical and operational requirements applicable to UWB GPR devices under Part 15, S…

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Date: 3/20/26 Attention: Application Examiner Reviewing Engineer Re: Attestation Statement Applicant: Geophysical Survey Systems, Inc. FRN: 0007272925 FCC ID: QF7NX0410 To whom it may concern, The internal photographs submitted with this application are th e same as was EMI tested. Sincerely, _________________________________ Signature _Jay Desruisseaux Name _Quality Manager Title _Geophysical Survey Systems, Inc. Company _603-681-2071 Telephone

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 03-20-2026 Ref: Attestation Statements Part 2.911(d)(7) Filing FCC ID or Grantee Code: QF7 Geophysical Survey Systems, Inc. (“th e applicant”) certifi es that, as of th e dat e of the filing of the application, we designate ourselves as the U.S. agent for service of process. Designated U.S. Agent Information: FRN: 0007272925 Name: Geophysical Survey Systems, Inc. Address: 40 Simon Street Nashua, NH 03060 Contact Person: Jay Desruisseaux Tel.: 603-681-2071 Email: [email protected] Sincerely, Jay Desruisseaux

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 03-20-2026 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: QF7NX0410 Geophysical Survey Systems, Inc. (“the applicant”) certifies that the equipment for which authorization is sought is not “covered” equipment prohibited from receiving an equipment authorization pursuant to section 2.903 of the FCC rules. Geophysical Survey Systems, Inc. (“the applicant”) certifies that the equipment for which authorization is sought does not include cybersecurity or anti-virus software produced or provided by Kaspersky Lab, Inc. or any of its successors and assignees, including equipment with integrated Kaspersky Lab, Inc. (or any of its successors and assignees) cybersecurity or anti-virus software pursuant to DA-24-886 and KDB 986446 D01 Covered Equipment Guidance section B(2a). Device is inherently compliant based on hardware limitations or software controls. or A Software Bill of Materials (SBOM) is provided to the TCB for review, and The end-user or third parties cannot install additional software on this device. Sincerely, Jay Desruisseaux Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 03-20-2026 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: QF7NX0410 Geophysical Survey Systems, Inc. (“the applicant”) certifies that, as of the date of the filing of the application, the applicant is not identified on the Covered List (as a specifically named entity or any of its subsidiaries or affiliates) as an entity producing “covered” equipment. Sincerely, Jay Desruisseaux

Application: QF7NX0410 & IC: 8498A-NX0410 Date: March 20, 2026 To Whom It May Concern: We, the undersigned, hereby authorize Wei Li, Advanced Compliance Laboratory, Inc., to act on our behalf in all manners relating to application for equipment authorization, including signing of all documents relating to these matters. Any and all acts carried out by Advanced Compliance Laboratory, Inc. on our behalf shall have the same effect as acts of our own. We, the undersigned, hereby certify that we are not subject to a denial of federal benefits, that includes FCC benefits, pursuant to Section 5301 of the Anti-Drug Abuse Act of 1988, 21 U.S.C. 853(a). In authorizing Advanced Compliance Laboratory, Inc. as our agent, we still recognize that we are responsible to: • comply with the relevant provisions of the certification program; • make all necessary arrangements for the conduct of the evaluation, including provision for examining documentation and access to all areas, records (including internal audit reports) and personnel for the purposes of evaluation (e.g. testing, inspection, assessment, surveillance, reassessment) and resolution of complaints; • make claims regarding certification only in respect of the scope for which certification has been granted; • do not use our product certification in such a manner as to bring the Certification Division into disrepute and not make any statement regarding our product certification which the Certification Division may consider misleading or unauthorized; • upon suspension or cancellation of certification, discontinue use of all advertising matter that contains any reference thereto and return any certification documents as required by the Certification Division; use certification only to indicate the products are certified as being in conformity with specified standards; • endeavor to ensure that no certificate or report nor any part thereof is used in a misleading manner; • ensure that any reference to our product certification in communication media such as documents, brochures or advertising, complies with the requirements of the Certification Division; • keep a record of all complaints made known to us relating to the product’s compliance with requirements of the relevant standard and to make these records available to the Certification Division when requested; • take appropriate action with respect to such complaints and any deficiencies found in products or services that affect compliance with the requirements for certification; • document the actions taken This authorization is valid until further written notice from the applicant. Sincerely Yours, Signature: Printed Name: Jay Desruisseaux Title: Quality Manager Company: Geophysical Survey Systems, Inc.

Re: Certification Application FCC ID: QF7NX0410 To Whom It May Concern: The above-referenced application, filed by Geophysical Survey Systems, Inc., seeks certification for a ground-penetrating radar (GPR) device. The application shows compliance with the Bureau's Rules and does not require waivers. We request that certain photographs showing the interior of the devices be withheld from public disclosure. The Bureau has previously granted confidentiality under similar conditions to the following applications: FCC ID: QF7MINIXT FCC ID: QF7FLEXNX FCC ID: QF7NX15 FCC ID: QF7NX25 FACTUAL BASIS FOR CONFIDENTIALITY REQUEST Ordinarily the Bureau denies confidentiality to photographs of a device on the ground that the information they contain is freely available to a competitor, simply by purchasing the device and (if necessary) unscrewing the cover. The devices in question are different. The interior is sealed, and its internal appearance is inaccessible to the purchaser. To gain access to the views shown in the interior photographs, a competitor would have to purchase the device and then carry out the following steps: 1.Remove all the tamper proof screws securing the cover to the rest of the enclosure. These are custom made security screws and are unique to GSSI. They require a custom security screwdriver which is ONLY sold to GSSI and is never given out to customers. Without this tool access to the interior of the product would require destroying part(s) of the antenna. 2.With the custom antenna enclosure open the various electronic assemblies must be dissembled in a careful and properly ordered manner using enhanced ESD precautions to prevent irreversible damage to the components. 3.Magnetic absorbers are glued together in the transmitter element enclosures and cannot be disassembled undamaged. These absorbers have specific electrical properties and only work properly in the specific arrangement as built. A competitor is unlikely to have access to the right material, or even to know what grade of materials to use and the proper orientations to install them for use. GSSI has never released instructions on how to disassemble its units and does not answer questions on how to do so. This information is kept internal to the company. The Bureau's posting of the photographs would allow a competitor to bypass this difficult and expensive disassembly. From the photographs, a competitor can estimate: 1. the costs of manufacturing the printed circuit boards and mechanical housing; 2. the man-hours required to assemble the device; 3. any compatibility problems the manufacturer will have in designing new systems; and 4. the age of the electronic design (which gives valuable competitive information on upgrade and R&D efforts). Access to interior photographs would almost permit a competitor to conduct a complete reverse engineering, to the point of producing a schematic. We respectfully submit that manufacturers should not be required to hand over to competitors the fruits of years of expensive engineering. Regards, ___________________________________________ Jay Desruisseaux Quality Manager

Date: 3/20/2026 Federal Communications Commission Authorization and Evaluation Division Confidentiality Request regarding application for certification of FCC ID: QF7NX0410 Pursuant to Sections §§0.457(d) and 0.459 of the Commission’s Rules, we hereby request long-term confidential treatment of information accompanying this application as outlined below: Exhibit Type File Name Block Diagram QF7NX0410 Block Diagram.pdf Operational Description QF7NX0410 Operational Description.pdf Schematics S74-076REV1.pdf Schematics Schematic A74-051 REV1.pdf Internal Photos QF7NX04 10 & 8498A-NX0410 Internal photos.pdf The above materials contain trade secrets and proprietary information not customarily released to the public. The information is not publicly available. The public disclosure of these materials may be harmful to the applicant and provide unjustified benefits to its competitors. The applicant understands that disclosure of this application and all accompanying documentation will not be made before the date of the certification for this application. Sincerely, Jay Desruisseaux Quality Manager

EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 57 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Section 7. EUT Photos This section provides different external and internal photographic views of the EUT. External Views: COMPASS NX Top View EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 58 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 COMPASS NX Front Side View EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 59 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 COMPASS NX Left Side View EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 60 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 COMPASS NX Right Side View EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 61 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 COMPASS NX Rear Side View EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 62 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 COMPASS NX Bottom View EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 63 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 I/O Ports View

EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 53 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Section 5. ID Labeling ID Label *The statement shall also be shown in its User Manual. ID Label Location Geophysical Survey Systems, Inc. Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Contains FCC ID: TLZ-CM276NF IC: 6100A-CM2276NF This device complies with Part 15, Subpart F of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference; (2) This device must accept any interference received, including interference that may cause undesired operation. ID Label on Top Surface of the EUT

EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 46 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Test No.13 Name of Test: Radio Frequency Exposure Test Standard: FCC OET Bulletin 65 &RSS-GEN Tested By: WEI LI Test Date: 12/16/2025-1/16/2026 LIMITS for FCC RF Exposure Evaluation §1.1310 The criteria listed in Table 1 shall be used to evaluate the environmental impact of human exposure to radio-frequency (RF) radiation as specified in §1.1307(b), except in the case of portable devices which shall be evaluated according to the provisions of §2.1093 of this chapter. EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 47 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 LIMITS per ISED RSS-102 (issue 6) Section 5.3.2 Table 7&8 for Exemption Limits for Routine Evaluation – RF Exposure Evaluation (10MHz ro300GHz) In these cases, the information contained in the RF exposure technical brief may be limited to information that demonstrates how the e.i.r.p. was derived. EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 48 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 CALCULATIONS for MPE distance and Power Density Given E = √ (30 * P * G) / d and S = E ^ 2 / 3770 where E = Field Strength in Volts/meter P = Power in Watts G = Numeric antenna gain d = Distance in meters S = Power Density in milliwatts/square centimeter Combining equations and rearranging the terms to express the distance as a function of the remaining variables yields: d = √ ((30 * P * G) / (3770 * S)) Changing to units of Power to mW and Distance to cm, using: P(mW) = P (W) / 1000 and d (cm) =100 * d (m) yields d = 100 * √ ((30 * (P / 1000) * G) / (3770 * S)) d = 0.282 * √ (P * G / S) where d = distance in cm P = Power in mW G = Numeric antenna gain S = Power Density in mW/cm^2 Substituting the logarithmic form of power and gain using: P (mW) = 10 ^ (P (dBm) / 10) and G (numeric) = 10 ^ (G (dBi) / 10) yields d = 0.282 * 10 ^ ((P + G) / 20) / √ S Equation (1) S = 0.0795 * 10 ^ ((P + G)/10)/ d^2 Equation (2) where d = MPE distance in cm P = Power in dBm G = Antenna Gain in dBi S = Power Density Limit in mW/cm^2 Equation (1) and the measured Output power is used to calculate the MPE distance. Equation (2) and the measured Output power is used to calculate the Power density. EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 49 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 RESULTS No non-compliance noted. For GPR UWB Transmitter only: 1-mW Test Exemption: Per § 1.1307(b)(3)(i)(A), a single RF source is exempt RF device (from the requirement to show data demonstrating compliance to RF exposure limits, as previously mentioned) if the available maximum time-averaged power is no more than 1 mW, regardless of separation distance. This exemption applies to all operating configurations and exposure conditions, for the frequency range 100 kHz to 100 GHz, regardless of fixed, mobile, or portable device exposure conditions. For this EUT, max emission level is under the 0dBm limit set in Part 15F: -5.3dBm (0.3mW). No RF hazard need to be concerned. The max. power density can be obtain by using the max. P+G= -5.3dBm and d=20cm, and plug all three items into equation (2), yielding, Power Density Limit (mW/cm 2 ) Max. Output Power+ Antenna] Gain (dBm) Calculated Power Density (mW/ cm 2 ) Max. EIRP (mW) 1.0/5.0 -5.3 6.0E-5 0.3 For WiFi Transmitter: WiFi Module Information: FCC ID: TLZ-CM276NF IC: 6100A-CM2276NF Modular: AzureWave /AW-CM276NF with preset max. RF power: 20.09dBm at 5GHz band. Antenna: Max. 5.16dBi gain for 5GHz band. Max. duty cycle factor is close to 100%. Worst case MPE per report # MFBECO-WTW-P20100054G: Power Density Limit (mW/cm 2 ) Output Power (dBm) Antenna] Gain (dBi) Power Density at 20cm (mW/ cm 2) Max. EIRP (mW) 1.0/5.0 20.09 5.16 0.067 335 Worst Case Scenario: GPR and WiFi Transmitting Simultaneously ---For FCC MPE compliance: With co-location of EUT Tx and pre-certified RF module, the following calculation shows total RF exposure is still under the MPE limit: EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 50 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Co-location calculations: ΣMPE = 6.0E-5 푚푚푚푚/푐푐푚푚2+ 0.067푚푚푚푚/푐푐푚푚2 = 0.06706 푚푚푚푚/푐푐푚푚2 which is less than the limit 1.0 푚푚푚푚/푐푐푚푚2 Additionally, Σ 푆푆푒푒푒푒푒푒푆푆lim푒푒=푆푆푒푒푒푒1푆푆lim1+ 푆푆푒푒푒푒2푆푆lim2≤1 Herein Σ푆푆푒푒푒푒푒푒푆푆lim푒푒=6.0E-5/1.0+0.067/1.0=0.06706≤1 ---For ISED, EUT max. e.r.i.p =0.6706W/m 2 < 1.262 푚푚/푚푚2 ( at f L =290MHz) Therefore, all of results are below the FCC/ISED limit. NOTE: For mobile or fixed location transmitters, the minimum separation distance between the antenna & radiating structures of the device and nearby persons is 20 cm, even if calculations indicate that the MPE distance would be less.

Electromagnetic Emission Compliance Test Report Equipment Under Test (EUT) Model COMPASS NX NX04/10 Applicant Geophysical Survey Systems, Inc. In Accordance With FCC Part 15, Subpart F Industry Canada RSS-220 (July 2018, Issue 1) Tested by Advanced Compliance Laboratory, Inc. 210 Cougar Court Hillsborough, New Jersey 08844 Authorized by Wei Li Lab Manager Signature Date March 20, 2026 AC Lab Report Number 0048-260304-01-FCC-IC The test result in this report is supported and covered by the ANAB accreditation (Certificate No. AT-3288). Advanced Compliance Laboratory 210 Cougar Court Hillsborough, NJ 08844 Tel: (908) 927 9288 Fax: (908) 927 0728 EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 2 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Table of Contents Section 1. Summary of Test Results .................................................................................. 3 Section 2. General Equipment & Test Configuration ........................................................ 6 Section 3. Test Methodology & Facilities ......................................................................... 8 Section 4. Measurement Data ............................................................................................ 9 Section 5. ID Labeling ..................................................................................................... 53 Section 6. Setup Photos.................................................................................................... 54 Section 7. EUT Photos ..................................................................................................... 57 EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 3 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Section 1. Summary of Test Results Manufacturer: Geophysical Survey Systems, Inc. Address: 40 Simon Street, Nashua, NH 03060 Product Name: COMPASS NX Model/Parts No. : NX04/10 S/N: PT1 General: All measurements are traceable to national standards These tests were conducted on a sample of the equipment for the purpose of demonstrating compliance with FCC Part 15, Sub Part F and Industry Canada RSS-220 (July 2018). New Submission Production Unit Class I Permissive Change Pre-Production Unit THIS TEST REPORT RELATES ONLY TO THE ITEM(S) TESTED. THE FOLLOWING DEVIATIONS FROM, ADDITIONS TO, OR EXCLUSIONS FROM THE TEST SPECIFICATIONS HAVE BEEN MADE. “See Summary of Test Data” ANAB LAB Certificate #: AT-3288 Advanced Compliance Laboratory, Inc. authorizes the above named company to reproduce this report provided it is reproduced in its entirety and for use by the company’s employees only. Any use which a third party makes of this report, or any reliance on or decisions to be made based on it, are the responsibility of such third parties. Advanced Compliance Laboratory, Inc. accepts no responsibility for damages, if any, suffered by any third party as a result of decisions made or actions based on this report. This report applies only to the items tested. EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 4 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Summary of Test Data Compliance Requirement FCC & IC Rule Part Test No. in Section 4 Result Cross Reference 15.505 &RSS-GEN 1 Complies Marketing of UWB Equipment 15.507 &RSS-GEN 2 Complies Pulse Repetition Frequency(PRF) 15.509 &RSS-220 6.2 3 Complies UWB Bandwidth 15.509(a) &RSS-220 6.2.1(a) 4 Complies General Operational Requirements for LF Imaging System 15.509(b) &RSS-220 6 5 Complies Spurious Radiated Emissions≤960MHz 15.509(d) 15.209 &RSS-220 3.4, 6.2(c), 6.2(d) 6 Complies Spurious Radiated Emissions>960MHz 15.509(d) 15.209 &RSS-220 3.4, 6.2(c), 6.2(d) 7 Complies Radiated Emissions in GPS Bands 15.509(e) 15.209 &RSS- 220 6.2(e) 8 Complies Highest Radiated Emission at f M 15.509(f) 15.209 &RSS- 220 6.2(g) 9 Complies Technical Requirements Applicable to All UWB Devices 15.521 10 Complies Coordination Requirement 15.525 11 N/A Antenna Requirement 15.203& 15.204 &RSS-GEN 7.1.4 12 Complies Radio Frequency Exposure FCC OET Bulletin 65 &RSS-GEN 13 Complies Conducted Emissions 15.507 &RSS-GEN 14 * Transmission Duration 15.509(c) &15.519(a)(1) 15 Complies * NOT APPLICABLE to the EUT as it is a dc powered device EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 5 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 The estimated uncertainty of the test result is given as following. The method of uncertainty calculation is provided in Advanced Compliance Lab. Doc. No. 0048-01-01. Prob. Dist. Uncertainty(dB) Uncertainty(dB) Uncertainty(dB) 30-1000MHz 1-6.5GHz Conducted Combined Std. Uncertainty u c norm. ±2.36 ±2.99 ±1.83 Wei Li Date: March 20, 2026 Lab Manager Advanced Compliance Lab EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 6 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Section 2. General Equipment & Test Configuration 2.1. EUT Specification EUT COMPASS NX , Model number: NX04/10, manufactured by Geophysical Survey Systems, Inc. is an SFCW radar system intended to be used in non-destructive testing and geophysical surveying. Supply Voltage 14.4VDC provided by NiMH Battery Operating Frequency Low Antenna: 80MHz-970MHz High Antenna: 90MHz-2700MHz -10dB UWB Bandwidth Normal Operation Mode: 2510MHz (from f L =290 MHz to f H =2800 MHz) Modulation Type SFCW: Stepped CW, Dwell Time=2us, Cycle Time=4ms (90 frequency points for each antenna) Peak Emissions in a 50 MHz Bandwidth Max. peak emissions: 65.5dBuV/m…

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EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Report Number: 0048-260304-01 -FCC-IC Page 54 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Section 6. Setup Photos Radiated Emissions in OATS Under 960MHz EUT: Compass NX Model No.: NX04/10 FCC ID: QF7NX0410 IC: 8498A-NX0410 Repo…

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