QF7NX25GPR NX25

User Guide MNXX-XXX Rev A Geophysical Survey Systems Inc. www.geophysical.com Copyright © 2023 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, 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. 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 Flex NX system and its accessories 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 FlexNX operates with stepped frequency CW modulation in 1-40 MHz steps between 30-6000 MHz 3. The FlexNX dwell time on any one frequency does not exceed 2 microseconds. 4. The dwell time during any step of the FlexNX does not exceed 0.04 percent of the device’s minimum scan/cycle rate. 5. For certification testing, the measurement of emissions from the FlexNX was conducted with the stepping function active for all possible frequency step sizes. 6. The FlexNX complies with all other technical and operational requirements applicable to UWB GPR devices under Part 15, Subpart F of the Commission’s rules. 7. Operation of the FlexNX is limited to GPRs and wall imaging systems operated for purposes associated with law enforcement, fire fighting, emergency rescue, scientific research, commercial mining, or construction. Parties operating this equipment must be eligible for licensing under the provisions of part 90 of § 15.509. 8. Sales of the GSSI GPR device authorized under this waiver are subject to an annual limit of 5,000 devices for each of the first two years and 10,000 devices each year thereafter. The FlexNX is not a toy. The FlexNX cannot be used on ships or aircraft. FCC Class A Compliance This device complies with Part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) this device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation. Warning: Changes or modifications to this unit not expressly approved by the party responsible for compliance could void the user’s authority to operate the equipment. Note: This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment or residential installation. This equipment generates, uses, and can radiate radio frequency energy and, if not installed and used in accordance with the introduction manual, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. 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 Table of Contents LIMITED WARRANTY, AND LIMITATIONS OF LIABILITY AND RESTRICTIONS GPR UWB COMPLIANCE NOTICE FCC CLASS A COMPLIANCE CANADIAN EMISSIONS REQUIREMENTS INTRODUCTION .......................................................................................................................................................... 1 WHAT’S IN THE BOX ................................................................................................................................................... 1 OPTIONAL ACCESSORIES ........................................................................................................................................... 2 SYSTEM SPECIFICATIONS ........................................................................................................................................... 2 COMPARISON OF FLEX NX AND STRUCTURESCAN MINI XT ............................................................................... 3 WHAT IS NEXUS?......................................................................................................................................................... 4 FLEX NX AND GSSI FUSION ....................................................................................................................................... 4 GPR THEORY OVERVIEW ............................................................................................................................................ 4 THE ANATOMY OF A GPR PROFILE ............................................................................................................................... 6 …

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Federal Communications CommissionDA 23-650 Before the Federal Communications Commission Washington, D.C. 205541 In the Matter of Geophysical Survey Systems, Inc. Request for Waiver of Sections 15.503(d), 15.31(c), and 15.521(d) of the Commission’s Rules ) ) ) ) ) ) ET Docket No. 22-458 ORDER Adopted: July 31, 2023Released: July 31, 2023 By the Chief, Office of Engineering and Technology: I.INTRODUCTION 1.By this Order we grant a request for waiver of Sections 15.503(d), 15.31(c) and 15.521(d) of the Commission’s rules filed by Geophysical Survey Systems, Inc. (GSSI) so that it can apply for FCC certification to market a new ultra-wideband (UWB) ground penetrating radar (GPR) device that does not comply with the requirements in those sections. 1 For the reasons discussed below, we find that there is good cause to grant GSSI’s waiver request. II.BACKGROUND 2.GSSI states that its new device is a stepped frequency, continuous wave (CW) modulated GPR transmitter that closely resembles its previously approved GPR handheld analyzer device. 2 GSSI states that its new device’s technical characteristics are nearly identical to those of a device for which the Office of Engineering and Technology (OET) granted waivers of the same rules that GSSI requests be waived for its device. 3 GSSI requests that any waiver granted in response to its petition include the same conditions OET previously included in a similar waiver grant. 4 3.Section 15.503(d) of the Commission’s rules defines an ultra-wideband transmitter as an intentional radiator that, at any point in time, has a fractional bandwidth equal to or greater than 0.20, or that has a UWB bandwidth equal to or greater than 500 megahertz, regardless of the fractional 1 Petition for Waiver of Geophysical Survey Systems, Inc. (filed Dec. 2, 2022) (GSSI Waiver Request). 2 GSSI Waiver Request at 1. 3 Id. at 1-2, 9. See also Proceq USA Inc. Request for Waiver of Part 15 of the Commission’s Rules Applicable to Ultra-Wideband Devices, Order, 33 FCC Rcd 2258 (2018) (Proceq Waiver Order); Letter from Julius Knapp, Chief, Office of Engineering and Technology to Terry G. Mahn; DA 19-892 (rel. Sep. 11, 2019) (Proceq Waiver First Modification); Request for Modification of Waiver Granted to Proceq USA Inc., Order, ET Docket No. 20-127, DA 22-1158 (rel. Nov. 4, 2022) (Proceq Waiver Second Modification). 4 GSSI Waiver Request at 11-12. The waiver conditions were designed to prevent any potential interference from operation of Proceq’s device. Federal Communications CommissionDA 23-650 2 bandwidth. 5 GSSI states that it is not possible for a frequency-hopping UWB transmitter such as its new device to meet this definition, so a waiver of this section is needed. 6 4.Sections 15.31(c) and 15.521(d) require UWB device emissions to be measured with the transmitter operating with the stepping function stopped. 7 GSSI states that a waiver of these rules is necessary because the GSSI GPR device will use frequency-hopping modulation to achieve improved performance characteristics and the device would not comply with the technical requirements with the stepping function stopped. 8 It states that measuring emissions with the stepping function active will not increase the interference potential of the device. 9 5.No parties filed comments in response to the OET request for comment on the GSSI waiver request. 10 III.DISCUSSION 6.We are authorized to grant a waiver under Section 1.3 of the Commission's rules if the petitioner demonstrates good cause for such action. 11 Good cause, in turn, may be found and a waiver granted “where particular facts would make strict compliance inconsistent with the public interest.” 12 To make this public interest determination, the waiver cannot undermine the purposes of the rule, and there must be a stronger public interest benefit in granting the waiver than in applying the rule. 13 7.We find that the GSSI device promises to deliver strong public interest benefits. GSSI’s device will provide significant economic, technological, and social value by providing users with real- time data, measurements, imaging, information, and analysis they need to more safely, efficiently, and effectively complete construction projects, serve clients, and benefit the public at large. 14 The newly developed device hardware and software will improve image quality, speed, and flexibility, giving professionals trained in concrete safety a better tool for evaluating structural risk. 15 The device’s multichannel antennas allow users to simultaneously see beneath a dense rebar mesh and determine important differences between subsurface targets in ways that have not been possible with previous 5 47 C.F.R. § 15.503(d). 6 GSSI Waiver Request at 5. 7 47 C.F.R. §§ 15.31(c), 15.521(d). 8 GSSI Waiver Request at 7. 9 Id. at 10-11. 10 Office of Engineering and Technology Seeks Comment on Geophysical Survey Systems, Inc. Request for Waiver of Sections 15.503(d), 15.31(c), and 15.521(d) of the Commission’s Part 15 Ultra-Wideband (UWB) Rules, ET Docket No. 22-458, Public Notice, DA 22-1354 (OET Dec. 22, 2022). 11 47 CFR § 1.3. See also ICO Global Communications (Holdings) Limited v. FCC, 428 F.3d 264 (D.C. Cir. 2005); Northeast Cellular Telephone Co. v. FCC, 897 F.2d 1164 (D.C. Cir. 1990); WAIT Radio v. FCC, 418 F.2d 1153 (D.C. Cir. 1969). 12 Northeast Cellular, 897 F.2d at 1166; see also ICO Global Communications, 428 F.3d at 269 (quoting Northeast Cellular); WAIT Radio, 418 F.2d at 1157-59. 13 See, e.g., WAIT Radio, 418 F.2d at 1157 (stating that even though the overall objectives of a general rule have been adjudged to be in the public interest, it is possible that application of the rule to a specific case may not serve the public interest if an applicant's proposal does not undermine the public interest policy served by the rule); Northeast Cellular, 897 F.2d at 1166 (stating that in granting a waiver, an agency must explain why deviation from the general rule better serves the pu…

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FCC Compliance Attestation Name of Manufacturer: Geophysical Survey Systems, Inc. Address: 40 Simon Street Nashua, NH 03060 Product Name: FLEX NX Model Number: FlexNX & NX25 FCC ID: QF7FLEXNX & FCC ID: QF7NX25 The FCC has granted Geophysical Survey Systems, Inc a waiver of sections 15.503(d), 15.31(c) and 15.521(d) rules so that the Flex NX system and its accessories can now be granted UWB certification. 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 DA 23-650. The equipment being submitted for product approval is operating and will be sold using specifications that exactly match the test results performed by Advanced Compliance Laboratory, Inc. These specifications are within all constraints as defined in the FCC’s granted UWB waiver of Sections 15.503(d), 15.31(c), and 15.521(d) of the Commission’s Rules. Furthermore, Geophysical Survey Systems, Inc (GSSI) guarantees that all conditions listed in the granted waiver, as described below, will be complied with for all relevant equipment sold by GSSI. 1.The GSSI GPR device shall be certified by an authorized Telecommunications Certification Body. A copy of this Order must be submitted with the application for certification. 2.The GSSI GPR device shall operate with stepped frequency CW modulation in 1-40 megahertz steps between 30-6000 MHz. 3.The GSSI GPR device dwell time on any one frequency shall not exceed 2 microseconds. 4.The dwell time during any step of the GSSI GPR shall not exceed 0.04 percent of the devices minimum scan/cycle rate. 5.For certification testing, the measurement of emissions from the GSSI GPR device shall be conducted with the stepping function active for all possible frequency step sizes. 6.The GSSI GPR device will comply with all other technical and operational requirements applicable to UWB GPR devices under Part 15, Subpart F of the Commission’s rules. 7.The entities permitted to operate the GSSI GPR device are limited to those specified in Section 15.509(b) of the Commission’s rules. 8.Sales of the GSSI GPR device authorized under this waiver are subject to an annual limit of 5,000 devices for each of the first two years and 10,000 devices each year thereafter. Signed for and on behalf of: Geophysical Survey Systems, Inc Place: Geophysical Survey Systems, Inc Nashua, NH Jay Desruisseaux, Quality Manager Date：8/3/23

CFR 47 §2.911 (d)(7) Agent Designation Attestation Date: 04-27-2023 FCC ID: QF7NX25 FRN: 0007-2729-25 To: Federal Communications Commission 7435 Oakland Mills Road Columbia, MD 21046 USA Geophysical Survey Systems, Inc. (“the applicant”) as required by section 2.911(d)(7), will also serve as the agent for service of process for the above referenced FCC ID. The applicant acknowledges that they will maintain an agent for no less than one year after the grantee has terminated 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 agent information changes. Jay Desruisseaux Geophysical Survey Systems, Inc. 40 Simon Street, Nashua, NH 03060-3075 [email protected] Sincerely yours, Jay Desruisseaux Geophysical Survey Systems, Inc. 40 Simon Street, Nashua, NH 03060-3075 [email protected]

Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 04-27-2023 Ref: Attestation Statements Part 2.911(d)(5)(i) Filing FCC ID: QF7NX25 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. Sincerely, Jay Desruisseaux Federal Communications Commission Authorization and Evaluation Division 7435 Oakland Mills Road Columbia, MD 21046 USA Date: 04-27-2023 Ref: Attestation Statements Part 2.911(d)(5)(ii) Filing FCC ID: QF7NX25 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 an entity producing “covered” equipment. Sincerely, Jay Desruisseaux

Project: FCC ID: QF7NX25 & IC: 8498A-NX25 Wifi Antenna datasheet: 2042811200_ANTENNAS-1380485.pdf (mouser.com) Antenna 1 location: The antenna will be located on the inside interior wall. It will be about 4mm inside where the sticker is. The distance from the center of the antenna to the tip of the piece where the button sits is approximately 32mm. This image shows a typical use case for this device. Antenna 2 Location: The second antenna is located at the rear side under the battery well. (See white sticker). It is approximately 29mm away from the bottom of the top cover. The hand will rest at least a couple mm higher than the 29mm distance in any way the user holds and use the device.

Application: QF7NX25 & IC: 8498A-NX25 Date: April 27, 2023 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 the 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: QF7NX25 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: QF762000 EA291754 FCC ID: QF75103A EA870041 FCC ID: QF750400 EA640311 FCC ID: QF7PALMXT EA813498 FCC ID: QF7MINIXT 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 installed in the transmitter element enclosures. 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. If a unit arrives at the company's repair facility showing evidence of such tampering, the company does not repair it, but charges the customer for a new unit plus freight costs. 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

EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 50 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: EUT Top View EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 51 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 EUT Bottom View EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 52 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 EUT Front Side View EUT_ Left Side View EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 53 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 EUT Back Side View EUT Right Side View EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 54 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Rechargeable Battery View ----Internal Photos shall be provided by Applicant (confidential)

EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 45 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 Section 5. ID Labeling ID Label *The statement shall be shown in its User Manual: 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. FCC/IC ID Label Location Geophysical Survey Systems, Inc. Model No.: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Contains FCC ID: UAY-W8997-M1216 IC: 6549A-W8997M1216 ID Label

Date: 4/27/23 Attention: Application Examiner Reviewing Engineer Re: Attestation Statement Applicant: Geophysical Survey Systems, Inc. FRN: 0007-2729-25 FCC ID: QF7NX25 To whom it may concern, The internal photographs submitted with this application are the same as was EMI tested. Sincerely, _________________________________ Signature _Jay Desruisseaux Name _Quality Manager Title _Geophysical Survey Systems, Inc. Company _603-681-2071 Telephone

EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 40 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: 02/01/2023-12/16/2022 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 sp ecified 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. LIMITS for FCC SAR Evaluation KDB 447498 D04 Interim General RF Exposure Guidance v01, section 2.1.3 SAR-Based Exemption: “A more comprehensive exemption, considering a variable power threshold that depends on both the separation distance and power, is provided in § 1.1307(b)(3)(i)(B). This exemption is applicable to the frequency range between 300 MHz and 6 GHz, with test separation distances between 0.5 cm and 40 cm, and for all RF sources in fixed, mobile, and portable device exposure conditions.” For 100 MHz to 6 GHz and test separation distances ≤ 50 mm, the 1-g and 10-g SAR test exclusion thresholds are determined by the following: [(max. power of channel, including tune-up tolerance, mW) / (min. test separation distance, mm)] · [√f(GHz)] ≤ 3.0 for 1-g SAR, and ≤ 7.5 for 10-g extremity SAR, EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 41 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 where f(GHz) is the RF channel transmit frequency in GHz FCC KDB 447498 D01 General RF Exposure Guidance v06, section 4.3.1 & Appendix A provides the SAR Test Exclusion Thresholds (ERP/Conducted) to verify that the device is exempt from 1-g extremity SAR at different separation distances. As example, for 900MHz Tx: 16mW (12dBm); For 2450MHz Tx: 10mW (10dBm) at ≤5 mm. Details in calculation formula for reference, given in § 1.1307(b)(3)(i)(B) to calculate the exemption: LIMITS per ISED RSS-102, Section 2.5 & Table 1 Per 2.5.1 Exemption Limits for Routine Evaluation — SAR Evaluation For limb-worn devices where the 10 gram value applies, the exemption limits for routine evaluation in Table 1 are multiplied by a factor of 2.5. Example: Exclusion Thresholds to verify that the 2450MHz Tx is exempt from 1-g SAR at separation distance of ≤5 mm: 4mW (6dBm) & 10-g SAR at separation distance of ≤5 mm: EUT: NX25 Model: NX25 FCC ID: QF7NX25 IC:8498A-NX25 Report Number: 0048-230201-02-FCC-IC Page 42 Advanced Compliance Laboratory, Inc. 210 Cougar Court, Hillsborough, NJ 08844, Tel: (908) 927 9288 10mW (10dBm). Per 2.5.2 Exemption Limits for Routine Evaluation – RF Exposure Evaluation RF exposure evaluation is required if the separation distance between the user and/or bystander and the device’s radiating element is greater than 20 cm, except when the device operates as follows: • below 20 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1 W (adjusted for tune-up tolerance); • at or above 20 MHz and below 48 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 4.49/f 0.5 W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 48 MHz and below 300 MHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 0.6 W (adjusted for tune-up tolerance); • at or above 300 MHz and below 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 1.31 x 10 -2 ƒ 0.6834 W (adjusted for tune-up tolerance), where ƒ is in MHz; • at or above 6 GHz and the source-based, time-averaged maximum e.i.r.p. of the device is equal to or less than 5 W (adjusted for tune-up tolerance). 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. Summary For FCC and IC, that max. declared power level can be modified by any duty cycle over the time averaging period. Time-averaging period is a time period not to exceed 30 minutes for fixed RF sources or a time period inherent from device transmission characteristics not to exceed 30 minutes for mobile and portable RF sources. For rf exposure, the averaging period is 6 minut…

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