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, Subpart F of the Commission’s rules.
7. Operation of the NX04/10 antenna 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 NX04/10 antenna is not a toy. The NX04/10 antenna 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.
Coordination Requirements
(a) UWB imaging systems require coordination through the FCC before the equipment may be used. The
operator shall comply with any constraints on equipment usage resulting from this coordination.
(b) The users of UWB imaging devices shall supply detailed operational areas to the FCC Office of
Engineering and Technology who shall coordinate this information with the Federal Government
through the National Telecommunications and Information Administration. The information provided
by the UWB operator shall include the name, address and other pertinent contact information of the
user, the desired geographic area of operation, and the FCC ID number and other nomenclature of
the UWB device. This material shall be submitted to the following address:
Frequency Coordination Branch, OET Federal Communications Commission, 445 12th Street, SW
Washington, D.C. 20554 ATTN: UWB Coordination
(d) Users of authorized, coordinated UWB systems may transfer them to other qualified users and to
different locations upon coordination of change of ownership or location to the FCC and coordination
with existing authorized operations.
(e) The NTIA/FCC coordination report shall include any needed constraints that apply to day-to-day
operations. Such constraints could specify prohibited areas of operations or areas located near
authorized radio stations for which additional coordination is required before operation of the UWB
equipment. If additional local coordination is required, a local coordination contact will be provided.
Notice: Use of this device as a through-wall imaging system is prohibited by FCC regulations.
Ground Penetrating Radar Coordination Notice and Equipment
Registration (for U.S. Customers only)
Note: This form is only for domestic United States users. The Federal Communications Commission (FCC)
requires that all users of GPR who purchased antennas after 15 July 2002 register their equipment and areas
of operation. It is required that you fill out this form and fax or mail to the FCC.
Failure to do this is a violation of Federal law.
1. Date:
2. Company Name:
3. Company Address:
4. Contact Information [Name and Phone Number]:
5. Area of Operation [State(s)]:
6. Equipment Identification:
Brand Name: Geophysical Survey Systems, Inc.
Antenna Model: List all NX antennas being registered.
7. Receipt Date of Equipment:
Fax this form to the FCC at: 202-418-1944 or mail to:
Frequency Coordination Branch, OET Federal Communications Commission, 445 12th Street, SW
Washington, D.C. 20554 ATTN: UWB Coordination
Do not send this information to GSSI.
Introduction
Thank you for purchasing NX04/10, the newest antenna in our industry-leading Powered by Nexus portfolio. Along
with pertinent regulatory information and guidelines, this manual provides antenna specifications, a list of included
and optional accessories, and an overview of antenna hardware features and antenna setup.
Our promise to you is to provide comprehensive training, unrivaled customer support and world-class expertise. That’s
why the NX04/10 antenna includes our industry-leading two-year warranty, complimentary training when purchased
as a complete Compass NX system, and technical support access. For more information, visit us at
www.geophysical.com.
Our team of dedicated technical trainers is ready to work with users of all experience levels,
and GSSI Academy classes are offered on an annual schedule. Check out the GSSI Academy
offerings at www.geophysical.com/gssi-academy or scan the accompanying QR code with your
smartphone.
What’s in the Box
The standard NX04/10 antenna ships with the following:
Optional Accessories
The following accessories are available for NX04/10 and are sold separately:
NX04/10 Antenna
NX04/10 4-Cell Li-
Ion Batteries (2x)
NX04/10 Battery
Charger and AC
Adapter
NX04/10 Sled
Antenna Specications and Features
Feature
Description
Unit Type
Ultra-Wideband Antenna
Measuring Type
Ground Penetrating Radar (GPR)
Antenna Technology
Stepped Frequency Continuous Wave [SFCW]
Communication
Wi-Fi to mobile device
External Features
Power button; 2x RS232 serial port; USB C port, Encoder port;
Operational Modes
Single or dual channel display
Trigger Modes
Encoder-based Distance; Time-based (continuous)
Samples per Scan
1024
Scans per Second
140
Time Range
Channel 1 (1000MHz): 100ns; Channel 2 (350MHz): 200ns
Max Depth
1000MHz antenna: 0-500cm; 350MHz antenna: 0-1000cm
Time Zero
Fixed; not field adjustable
Internal GPS
No
GPS Connections
To antenna: RS232 serial; To mobile device controller: Bluetooth
Display
No integrated display; External mobile device required
Storage
No user-accessible onboard storage
Operating Temperature
-20°C to +50°C (-4°F to +122°F)
Storage Temperature
-40°C to +60°C (-40°F to +140°F)
IP Rating
IP65 (fully sealed against dust and low-pressure omnidirectional water)
Battery Access
User-removable
Battery Performance
Up to 4 hours per battery (two rechargeable 4-cell batteries included)
Dimensions
47cm x 40cm x 23cm (18.5in x 15.75in x 9in)
Weight
6.8kg (15lbs)
Hardware Warranty
2 years from date of purchase
NX04/10 External Features
Antenna Setup and Use
In adherence with domestic and international shipping restrictions the two included 4-cell batteries were
shipped to you at <30% charge level. Begin by charging the batteries using the supplied battery charger. The
charger’s LED lights will flash while charging; the lights will be solid when charging is complete. Battery
charging could require 2 to 4 hours depending on the charge status.
Insert a fully charged battery into the battery compartment and press the Power On/Off button. The LED
state will transition to a solid color when the antenna is ready for operation. NX04/10 will then broadcast a
Wi-Fi SSID using the antenna model and serial number, such as NX0410_000141. To determine your antenna
model and serial number please refer to the decal located on the top of the antenna.
To interact with the NX04/10 antenna you must install the GSSI NX Control app on an Android or iOS mobile
device. Before launching the NX Control App, connect to the NX04/10 Wi-Fi network and enter geophysical
when prompted for a password. For more information please refer to the NX Control app documentation.
