Sokkia GCX2 User manual

GCX2
GNSS Receiver
Operator’s Manual
Part Number 1005278-01
Rev A
©Copyright Sokkia
March, 2015
All contents in this manual are copyrighted by Sokkia. All rights reserved.

Table of Contents
Table of Contents
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Preface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Terms and Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Use . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Copyrights . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Trademarks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . iv
Disclaimer of Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .iv
License Agreement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .v
Confidentiality . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Website; Other Statements . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Safety . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Miscellaneous . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . v
Manual Conventions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . vi
Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .1
GCX2 Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Unpacking Your Receiver Kit . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
System Components . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2
Technical Documents . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Using Sokkia Software With Your Receiver. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Getting Technical Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Website . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
Getting Acquainted . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
Receiver Overview. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
GCX2 Receiver Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Cable and Adapters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
Drivers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Memory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
Long-Range Bluetooth Technology . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
USB Port Panel . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Display Panel Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
LED Icon Key . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Power Button . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
Receiver Status LEDs. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Tracking Status LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .9
Recording LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Communication LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Battery LED . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Managing Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
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Table of Contents

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Table of Contents
Turning the Receiver ON/OFF. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Using Internal and External Power Sources . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Internal Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
Charging the Battery . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .12
Power Accessories . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Insufficient Power . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
Configuring the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Before You Begin . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Viewing Receiver Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Open the Receiver Info Window . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
Loading New Firmware . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Upload Firmware Files to the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
Option Authorization Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Checking the Receiver’s OAF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
View Receiver Options Using SRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Loading an OAF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Load a New OAF . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
Resetting the Receiving (Clearing the NVRAM). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
Clear NVRAM Using SRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
System Setup . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting Up the Base Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
Setting Up the Rover Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
Measuring Antenna Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Obtain Accurate Antenna Height . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
Collecting Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Set Recording Parameters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Log Rates. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Record Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Start/Stop Recording Using LED Display Panel or SRU . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
File Management . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Download and Delete Files . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Troubleshooting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Check This First . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Powering Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
The following are some of the most commonly encountered power problems. . . . . . . . . . . . . . . 26
Receiver Does Not Power Up . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 26
Receiver Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
No Connection to Computer or External Controller . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Cable Specific Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Generic Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
No Long Term Lock on Satellites . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Too Few Satellites Tracked . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28

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No Code Differential and/or RTK Solutions Obtained . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 28
Receiver Does Not Log Data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Bluetooth Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
SRU Error Message: Can’t Find Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
No Available Devices Discovered . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Receiver Bluetooth Icon Visible, but Cannot Establish Connection . . . . . . . . . . . . . . . . . . . . . . . 30
Long-Range Problems . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Long-Range Cannot Discover Base Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
Cannot Establish Bluetooth Connection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 30
SRU Problems. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
SRU Cannot Connect to Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Cleaning and Storing the Receiver . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Getting Customer Support . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
General Details . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
General Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Battery Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Receiver Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Usage Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Regulatory . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
FCC Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Industry Canada Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Community of Europe Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
European Community Declaration of Conformity with R&TTE Directive 1999/5/EC . . . . . . . . . . . 37
Declaration of Conformity (R&TTE Directive 1999/5/EC) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
WEEE Directive . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Bluetooth Transmission Statements/Compliance. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Korean KC-RF Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Japan Radio Law and Telecommunications Business Law Compliance. . . . . . . . . . . . . . . . . . . . . . . . 39
Bluetooth Module Compliance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Warranty . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40

Preface
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• • • • • •
Preface
Thank you for purchasing this Sokkia product. The materials available in this Manual (the “Manual”) have been
prepared by Topcon Positioning Systems, Inc. (“TPS”) for owners of Sokkia products, and are designed to assist
owners with the use of the receiver and its use is subject to these terms and conditions (the “Terms and
Conditions”).
Please read the terms and conditions carefully.
Terms and Conditions
Use
This product is designed to be used by a professional. The user should have a good knowledge of the safe use of
the product and implement the types of safety procedures recommended by the local government protection
agency for both private use and commercial job sites.
Copyrights
All information contained in this Manual is the intellectual property of, and copyrighted material of TPS. All rights
are reserved. Do not use, access, copy, store, display, create derivative works of, sell, modify, publish, distribute,
or allow any third party access to, any graphics, content, information or data in this Manual without TPS’ express
written consent and may only use such information for the care and operation of the receiver. The information
and data in this Manual are a valuable asset of TPS and are developed by the expenditure of considerable work,
time and money, and are the result of original selection, coordination and arrangement by TPS.
Trademarks
MAGNET®, Sokkia®, and Topcon®are trademarks or registered trademarks of the Topcon group of companies.
Windows® is a registered trademark of Microsoft Corporation. The Bluetooth®word mark and logos are owned
by Bluetooth SIG, Inc. and any use of such marks by Topcon Positioning Systems, Inc. is used under license. Other
product and company names mentioned herein may be trademarks of their respective owners.
Disclaimer of Warranty
EXCEPT FOR ANY WARRANTIES IN AN APPENDIX OR A WARRANTY CARD ACCOMPANYING THE PRODUCT, THIS
MANUAL AND THE RECEIVER ARE PROVIDED “AS-IS.” THERE ARE NO OTHER WARRANTIES. TPS DISCLAIMS ANY
IMPLIED WARRANTY OF MERCHANTABILITY OR FITNESS FOR ANY PARTICULAR USE OR PURPOSE. TPS AND ITS
DISTRIBUTORS SHALL NOT BE LIABLE FOR TECHNICAL OR EDITORIAL ERRORS OR OMISSIONS CONTAINED
HEREIN; NOR FOR INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM THE FURNISHING,
PERFORMANCE OR USE OF THIS MATERIAL OR THE RECEIVER. SUCH DISCLAIMED DAMAGES INCLUDE BUT ARE
NOT LIMITED TO LOSS OF TIME, LOSS OR DESTRUCTION OF DATA, LOSS OF PROFIT, SAVINGS OR REVENUE,
OR LOSS OF THE PRODUCT’S USE. IN ADDITION TPS IS NOT RESPONSIBLE OR LIABLE FOR DAMAGES OR COSTS
INCURRED IN CONNECTION WITH OBTAINING SUBSTITUTE PRODUCTS OR SOFTWARE, CLAIMS BY OTHERS,
INCONVENIENCE, OR ANY OTHER COSTS. IN ANY EVENT, TPS SHALL HAVE NO LIABILITY FOR DAMAGES OR
OTHERWISE TO YOU OR ANY OTHER PERSON OR ENTITY IN EXCESS OF THE PURCHASE PRICE FOR THE
RECEIVER.

Preface
Preface
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P/N: 1005278-01
License Agreement
Use of any computer programs or software supplied by TPS/Sokkia or downloaded from a Sokkia website 
(the “Software”) in connection with the receiver constitutes acceptance of these Terms and Conditions in this
Manual and an agreement to abide by these Terms and Conditions. The user is granted a personal, non-
exclusive, non-transferable license to use such Software under the terms stated herein and in any case only with
a single receiver or single computer. You may not assign or transfer the Software or this license without the
express written consent of TPS. This license is effective until terminated. You may terminate the license at any
time by destroying the Software and Manual. TPS may terminate the license if you fail to comply with any of
the Terms or Conditions. You agree to destroy the Software and manual upon termination of the use of the
receiver. All ownership, copyright and other intellectual property rights in and to the Software belong to TPS. If
these license terms are not acceptable, return any unused software and manual.
Confidentiality
This Manual, its contents and the Software (collectively, the “Confidential Information”) are the confidential and
proprietary information of TPS. You agree to treat TPS’ Confidential Information with a degree of care no less
stringent that the degree of care you would use in safeguarding your own most valuable trade secrets. Nothing
in this paragraph shall restrict you from disclosing Confidential Information to your employees as may be
necessary or appropriate to operate or care for the receiver. Such employees must also keep the Confidentiality
Information confidential. In the event you become legally compelled to disclose any of the Confidential
Information, you shall give TPS immediate notice so that it may seek a protective order or other appropriate
remedy.
Website; Other Statements
No statement contained at the TPS and Sokkia websites (or any other website) or in any other advertisements
or TPS literature or made by an employee or independent contractor of TPS modifies these Terms and Conditions
(including the Software license, warranty and limitation of liability).
Safety
Improper use of the receiver can lead to injury to persons or property and/or malfunction of the product. The
receiver should only be repaired by authorized TPS warranty service centers. Users should review and heed the
safety warnings in an Appendix.
Miscellaneous
The above Terms and Conditions may be amended, modified, superseded, or canceled, at any time by TPS. The
above Terms and Conditions will be governed by, and construed in accordance with, the laws of the State of
California, without reference to conflict of laws.

Preface
Preface
vi
P/N: 1005278-01
Manual Conventions
This manual uses the following conventions:
Bold Menu, or drop-down menu selection FileExit (Click the File menu and click
Exit)
Bold Name of a dialog box or screen From the Connection screen...
Bold Button or key commands Click Finish.
Mono User supplied text or variable Type guest, and click Enter.
Italic Reference to another manual or help document Refer to the Sokkia Reference Manual.
Further information to note about system configuration, maintenance, or setup.
Supplementary information that can have an adverse affect on system operation, system
performance, data integrity, measurements, or personal safety.
Notification that an action has the potential
to result in system damage, loss of data, loss of
warranty, or personal injury.
Convention Description Example

Introduction
1
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• • • • • •
Introduction
Sokkia’s GSX2 receiver is a compact, lightweight, and completely integrated GNSS receiver for static and 
cable-free stop and go/kinematic applications. The integrated receiver design includes a GNSS receiver board,
based on industry-leading technology, internal long-life batteries, memory storage, and Long-Range Bluetooth
communication technology. The GSX2 delivers world-class positioning and navigation capability to your
application by tracking signals from multi-constellation satellite systems, including GPS, GLONASS, and SBAS.
The GCX2 includes Sokkia’s exclusive Long-Range Bluetooth Technology®, which provides the perfect solution for
short range job sites that require RTK communication. The GCX2 can be paired with a cellular-enabled data
collector to receive corrections from an NTRIP Caster for rover operation. This setup can also be used with
MAGNET Relay for a cost effective RTK base solution over long distances. The MAGNET Relay configuration
enables you to operate up to ten GCX2 rovers with a single GCX2 base.
The GCX2 offers complete IP67 protection against dust and water ingress, in addition to superior vibration and
shock resistance. The Sokkia communication interface enables you to quickly integrate Sokkia’s premium GNSS
performance within new systems and quickly deliver world-class positioning and navigation support to your
applications.
Figure 1: GCX2 Receiver

GCX2 Features
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Introduction
GCX2 Features
The GCX2 receiver’s advanced design eliminates the need for cables during operation, allowing for a simplified
setup and less parts to keep track of. The GCX2 receiver features the following:
• Compact, lightweight, and rugged design
• A premier multi-constellation GNSS board featuring industry leading technology
• Integrated multi-channel Long-Range Bluetooth technology
• Internal memory for data storage
• One internal battery, providing all day operation under normal operating conditions
• A highly visible display panel with single-button operation
• One USB port for communications and power
You can configure the GCX2 receiver in a variety of ways, depending on your project requirements. Typically,
the receiver supports the following operation modes.
• Static/post-processing data collection
• Job site RTK using Long-Range Bluetooth technology
• Network Rover for DGPS and RTK operation
• MAGNET Relay operation
• SBAS-enabled operation
Unpacking Your Receiver Kit
This section describes the documentation, standard kit components, and accessories (depending on your
purchase) that accompany your receiver. When you unpack your receiver kit, verify you received the items listed
in this section. Make sure the items do not appear damaged from shipment. If any of the items are missing or
damaged, contact your Sokkia dealer or Sokkia technical support. See “Getting Technical Support” on page 3.
• Receiver components are shown in Figure 2.
• Receiver documentation is listed in “Technical Documents” on page 3.
System Components
The items shown in Figure 2 are shipped with your receiver.
Figure 2: System Components
Utility software for the GCX2 receiver may be downloaded from the Sokkiasupportwebsite:
http://www.sokkiasupport.com/.

Technical Documents
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Introduction
Technical Documents
The GCX2 Operator’s Manual is designed to help you set up and use your new receiver quickly and efficiently.
You can download a digital copy of the
GCX2 Operator’s Manual from the Sokkia support website:
http://www.sokkiasupport.com
• GCX2 Operator’s Manual – An on-screen help document that contains detailed information on how to use your
new receiver.
• Sokkia Receiver Utility (SRU) Reference Guide – An on-screen help document that contains detailed
information on how to use the SRU software. See “Using Sokkia Software With Your Receiver”.
• GCX2 LED Card - Included in the package, describes the functions of the LEDs.
Using Sokkia Software With Your Receiver
Use the GCX2 receiver in conjunction with the Sokkia Receiver Utility (SRU) and MAGNET Field™ applications
for a cable-free positioning solution. Using Sokkia software, you can configure the receiver and other external
devices, manage files, collect data, and perform survey and construction work flows.
The Sokkia Receiver Utility (SRU) is a hardware configuration software utility for receivers and peripheral
devices. You can install it on desktop computers and data controllers. You can download the SRU software and
manual from the Sokkia support website: http://www.sokkiasupport.com.
SRU Help is also embedded in the software.
Sokkia’s MAGNET®Field software for data controllers provides real-time communication, cloud storage, data
collection and exchange, and field solutions, such as topo, staking, roads, calculations, and more.
MAGNET®Relay is a GNSS correction service hosted by the MAGNET®Solution. With a subscription to MAGNET
Relay, you can connect the GCX2 Cellular receiver to the Relay service (via cellular-enabled data collector) and
use it as a Base for up to 10 Rovers.

Contact your Sokkia dealer for more information about the Sokkia software described above.
Getting Technical Support
Before contacting a Sokkia customer representative about any problems with the receiver, see
“Troubleshooting” on page 26.
For technical support, contact your local Sokkia dealer or visit http://www.sokkiasupport.com.
When contacting Sokkia for technical assistance, provide the following information for better and faster service.
1. A description of the following:
a. Field operation that was being performed when the problem occurred.
b. Details of the unexpected behavior, symptoms, and any error messages that precede or follow the
problem.
c. Problem occurrence frequency or patterns
2. Receiver information and configuration settings. For receiver information, click Information in SRU,
select Save to File, enter a file name, and save it to the computer.
3. Specifications of mobile devices and computers used in the field or office exhibiting the problem. These
specifications should include model information, version number, operating system information, memory
and storage capacity, etc.
4. Information about the system software, including the version number and steps to reproduce the problem.
5. A description of the field environment and/or observation conditions when the problem occurred.
Website
The Sokkia website provides current information about Sokkia’s line of products. The support area of the
website provides access to Sokkia field and office software, manuals, frequently asked questions, and so forth.
To access the Sokkia website, visit www.sokkia.com.

Getting Acquainted
4
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• • • • • •
Getting Acquainted
The GCX2 receiver enclosure is fully sealed and incorporates the GNSS receiver board, Precision Orbital satelite
tracking technology antenna, battery, memory storage, and Sokkia’s Long-Range Bluetooth Technology®.
Receiver Overview
The GCX2 receiver enclosure is fully sealed and incorporates the GNSS receiver board, innovative POST™
(Precision Orbital Satellite Technology) antenna element, integrated battery, internal memory storage, and
Sokkia’s Long-Range Bluetooth Technology®.
The upper portion of the receiver contains GNSS and antennas for Long-Range Bluetooth communication enclosed
by the radome.
An easy-to-operate display panel, mounting socket, and labels with receiver information are located on the bottom
of the receiver’s aluminum alloy lower enclosure.
The GCX2 receiver has a highly-visible display panel with single-button operation. The display panel enables you
to view the receiver’s operational status. See “Display Panel Operations” on page 19.
The mounting socket (Figure 4) connects the receiver to either a standard 5/8''-11 thread pole or adapter.
Locate regulatory and product identification information on the two receiver labels. The product identification label
contains the serial number and part number along with a quick response (QR) matrix code.
Scan the QR code with any QR code application on a smart phone for product information or visit the Sokkia
support website: http://sokkiasupport.com

Cable and Adapters
5
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Getting Acquainted
GCX2 Receiver Overview
Figure 3: GCX2 Receiver Overview
Cable and Adapters
The GCX2 package includes a USB cable for power and data transfer. Table 1  describes the cable and adapters
included with your receiver.
Table 1. Receiver Cable and Adapters
Descriptions Illustration
Mini USB 2.0 Cable
P/N: 14-008081-01
Connects the receiver to an external device
(controller or computer) for data transfer,
receiver configuration, and to a power
adapter for charging the internal battery.

Drivers
6
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Getting Acquainted
Drivers
32-bit or 64-bit Windows®driver is required. See “Before You Begin” on page 13.
Memory
The GCX2 is equipped with an internal, non-removable memory card that provides up to 8 GB of data storage.
As data is logged to the receiver’s memory, the REC LED displays the memory capacity status. See “Recording
LED” on page 9 for more information.
To access the raw data files in the receiver’s internal memory, see “Record Data” on page 24.
Internal Battery
The GCX2 receiver was designed with one internal, non-removable battery. When fully charged, the battery
provide all day operation in any job configuration. The battery is easily charged using a USB cable. See “Internal
Battery” on page 11.
Long-Range Bluetooth Technology
The GCX2 receiver integrates Long-Range Bluetooth technology that enables multiple (up to 3) cable-free
connections to other GCX2 devices for Long-Range Bluetooth technology for base/rover RTK systems. You can
also connect the receiver to other Class 1- and Class 2-enabled Bluetooth devices (such as data collectors and
computers) using Bluetooth wireless technology concurrently with Long-Range Bluetooth connections.
AC/DC Desktop Wall Adapter
P/N: 1005518-01
Charges the receiver when connected to a
grounded outlet and the power charger
cable.
Wall Adapter Folding Clip Kit
P/N: 1005519-01
Power adapters for use in different
countries including the UK, Australia, and
Europe.
NOTE: Wall adapter folding clip kit is not
required to be added on this adapter for use
in the USA.
Table 1. Receiver Cable and Adapters

USB Port Panel
7
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Getting Acquainted
Sokkia’s Long-Range Bluetooth technology enables communication of RTCM3 differential corrections between
two GCX2 receivers over Bluetooth (up to 300 meters), eliminating the need for additional external radios for
corrections. See “System Setup” on page 21.
Distance for long-range largely depends upon environmental and field conditions.
USB Port Panel
The receiver is equipped with a USB 2.0 port for high-speed data transfer and communication between the
receiver and an external device, for charging the internal battery, and
for powering the receiver with an external
power supply. See “Using Internal and External Power Sources” on page 11.
USB Port Panel
Mounting Socket
Figure 4: USB Port Panel

Display Panel Operations
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• • • • • •
Display Panel Operations
The LED display panel provides controls for receiver power and data recording. The LEDs display the status of the
satellite tracking, recording/memory capacity, Long-Range Bluetooth Technology®connections, and battery.
Power
(PWR)
Recording
(REC)
Battery
(BATT)
Bluetooth®
(BT)
Status
(STAT)
Figure 5: LED Display Panel
LED Icon Key
Table 2. LED Icon Key
Display
Solid Blinking OFF
 
Power Button
The green power button performs multiple functions. The duration in which the button is pressed and held
determines how the receiver will perform. While pressing the button, the LED panel indicates the selected
operation using particular LEDs.
Table 3. Power Button Functions
Function Press Button LED Description
Power ON 1+ seconds Power LED blinks green until the startup is complete and then the LED
turns OFF.
Power OFF 3-10 seconds All LEDs are OFF. Release the power button when Battery LED is solid.
Factory Reset
Clear NVRAM
10-15 seconds All LEDs are OFF. Release the power button when Status LED is solid
red.
Erase All Files 15-20 seconds All LEDs are OFF. Release the power button when Recording LED is
solid red.
NOTE:
This action is irreversible. If unsure about these actions,
continue to hold down the button until all LEDs return to normal.

Receiver Status LEDs
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Display Panel Operations
Receiver Status LEDs
There are four status LEDs that display information about the battery life, tracked satellites, memory capacity,
and Bluetooth wireless connectivity. This section describes the color and behavior of each LED.
Tracking Status LED
The Tracking status LED displays how many satellites the receiver is tracking.
Table 4. Tracking Status LED Patterns
Display Description

GREEN
One blink per tracked GPS satellite.

ORANGE
One blink per tracked GLONASS satellite.

RED
One blink when there are no tracked satellites or solutions. It is OFF otherwise.
Recording LED
The memory LED indicates if data is being written to memory and displays how much memory the receiver has
available for recording.
Table 5. Recording LED Status
Display Function Description
GREEN: Greater than 50%
ORANGE: Greater than 10%
RED: Less than 10%
File logging is in progress. 
Each blink indicates data is being written to memory.
When the receiver is in Dynamic mode the LED blinks twice every second.
When the receiver is in Static mode the LED blinks once every second.
GREEN: Greater than 50%
ORANGE: Greater than 10%
RED: Less than 10%
The file is closed. A solid light indicates no data is being recorded.
GREEN and RED:
Erase all memory
Alternating green and red LEDs indicate all files are being deleted.
ORANGE and RED:
Formatting memory
Alternating red and yellow LEDs indicate the memory card is being initialized or
formatted.
BLACK: 
Missing or faulty memory
The LED is OFF.
Hardware
Shutdown/Reset
More than 35-50
seconds
Shuts down power of all internal components of the receiver. This
function is only recommended when the receiver goes into
Exception mode. This operation does not affect internal memory or
receiver settings.
Open/Close Data File 3 times in a row within
2 seconds
The data file opens in Static mode.
While the file is open, press the power button 2 times in a row within
1 second to switch back and forth between Static and Dynamic
modes.
To close a data file, press the power button 3 times in a row within 2
seconds.
Refer to the Recording LED description.
Table 3. Power Button Functions

Receiver Status LEDs
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Display Panel Operations
Communication LED
The Communication LED displays the status of the cellular and Bluetooth activity. The following tables describe
the communication activity for three use cases.
Bluetooth Status
Table 6. Bluetooth LED Patterns
Display Description
BLUE: Bluetooth is ON. Waiting for a connection.
BLUE: Single Bluetooth connection is established.
BLUE: LongLink connections are established. LED blinks for each connection every 5
seconds.
Bluetooth is OFF.
Battery LED
The Battery LED indicates the remaining charge of the internal battery. When an external power source is
utilized the LED turns green and begins to blink if the battery is charging.
Table 7. Battery LED Patterns
Display Description
RECEIVER IS ON/INTERNAL BATTERY IN USE
GREEN: The charge is greater than 50%.
ORANGE: The charge is greater than 15%.
RED: The charge is less than 15%.
RECEIVER IS ON/EXTERNAL POWER IN USE/PWR LED IS SOLID GREEN
GREEN: An external power source is in use. The internal battery is fully charged.
GREEN: The internal battery is at greater than 50% capacity. The battery is charging.
ORANGE: The internal battery is at greater than 15% capacity. The battery is
charging.
RED: The internal battery is at less than 15% capacity. The battery is charging.
RECEIVER IS OFF
RED: The receiver is connected to an external power source. The battery is fully
charged.
RED: The receiver is connected to an external power source. The battery is charging.

Managing Power
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• • • • • •
Managing Power
Turning the Receiver ON/OFF
To turn on the receiver, press and hold the power button until the LEDs briefly flash. When the receiver is turned
ON, the receiver’s channels initialize and begin tracking all visible satellites at any time and location.
To turn OFF the receiver, press and hold the power button for more than three and less than 10 seconds (release
the power button when the BATT LED blinks solid red). This delay prevents the receiver from being turned OFF
by mistake.
The receiver will draw a small amount of power from the battery when it is turned off. If the receiver
is placed in storage for a long period, such as a few months, the battery may become fully
discharged. You will need to use an external power supply or recharge the battery before use.
Using Internal and External Power Sources
The receiver is powered by the internal battery or an external power source connected to the USB port. If an
external power source is connected, the receiver draws power from it in preference to the battery.
Using a standard USB cable, you can connect the receiver to an external power source with 4.5 to 5.5 VDC to
operate the receiver. See “Specifications” on page 32 .
Power input greater than 6 VDC could damage the receiver.
Internal Battery
The receiver first draws power from a connected external power source. When there is no valid external power
source connected or if the source has discharged lower than 4.5V, the receiver will draw its power from one high-
capacity internal battery (non-removable). Depending on the use case, the hours of operation provided by the
internal battery varies. See Table 8 on page 11.
The battery is shipped from the factory with a partial charge. For maximum operating time, fully
charge the battery before using the receiver.
Table 8. Operation Hours
Use Description Approx. Hours of Operation
MAGNET Relay™ Base Base sending RTCM 3 differential corrections to MAGNET
Relay Service.
12
Long-Range Bluetooth
Technology®RTK Base
Base sending RTCM 3 differential corrections to one Rover. 12
Long-Range Bluetooth
technology RTK or
Network RTK Rover
Rover receiving RTCM 3 differential corrections over Long-
Range Bluetooth technology or from a Network site, and
corrected through Bluetooth to a data collector.
12
Static Survey Static setup logging raw GNSS data at 1 Hz. 12
Approximate hours of operation listed are when operated at 20° C.

Insufficient Power
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Managing Power
Charging the Battery
When the battery charge is low, the BAT LED changes from solid green to yellow and then red, depending on
the remaining charge. See “Battery LED” on page 10.
When the receiver is connected to an external power source, the battery charges whether the receiver is turned
ON or OFF.
To charge the battery:
1. Connect the supplied USB 2.0 cable to the receiver’s USB port.
2. Connect the USB cable to the USB port of the power adapter.
3. Plug the power adapter into an available outlet to fully charge the battery. The time to charge the battery
depends on whether the unit is ON or OFF, and if current is supplied from an external charger. The BAT
LED blinks as the battery charges.
The battery will stop charging when it is full.
Use a grounded wall outlet or grounded surge protector while charging. The socket should be
located near the equipment and easily accessible.
Power Accessories
The USB 2.0 port of the GCX2 powers and charges the internal battery. The GCX2 is compatible with standard
USB power accessories used with consumer electronic devices. USB power accessories can be sourced locally
as long as USB power standards are met.
Insufficient Power
If the battery becomes fully discharged and an external power supply is not connected, the receiver will shut
down and automatically save recorded files. To avoid disruptions, check the BAT LED on the display panel for
the battery charge status. See “Battery LED” on page 10 for more information.
If the receiver shuts down due to insufficient power, the receiver and all communication ports become
deactivated.
To restore power to your receiver and turn it back on, do one or all of the following:
• Recharge the battery.
• Make sure the USB cable is correctly connected to the receiver’s port.
• Connect the receiver to a different power source.
Power supplied to the receiver should match the specifications provided by Sokkia on the product.
Failure to comply with these specifications may damage the receiver.