To reset the Sokkia GRX3 GPS receiver, you can perform either a hardware reset or a factory reset:

Hardware Reset:
1. Make sure the receiver is powered on.
2. Press the Reset button located under the SIM card door.
3. This does not delete stored “*.tps” data files.

Factory Reset (using SRU software):
1. Connect the receiver to a computer and open SRU.
2. Click Device > Application Mode > Receiver Managing.
3. Click Device > Connect and then click the Connect button.
4. Click the Tools icon, then select Factory Reset.
5. Confirm by clicking Yes when prompted.

Factory Reset (using LED Display):
1. Press and hold the Power button for 10–15 seconds.
2. Release when the STAT LED turns magenta.
3. Wait for the STAT and REC LEDs to blink orange, then turn green.

These steps fully reset the GRX3 receiver.

This answer is automatically generated

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Summary of Contents for Sokkia GRX3

Page 1 GRX3 GRX3 GRX3 GNSS Receiver GNSS Receiver GNSS Receiver Operator Manual Operator Manual Operator Manual...
Page 3: Table Of Contents
Technical Documents ..........1-4 Using Sokkia Software With Your Receiver ......1-4 Getting Technical Support .
Page 4 Configuration ..........5-1 Installing Sokkia Receiver Utility (SRU) ....... . . 5-1 Loading New Firmware .
Page 5 Bluetooth Problems..........8-5 SRU Problems .
Page 6: Preface
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”).
Page 7 Although the support documentation, firmware and utility software for the Sokkia GRX3 can be found at the Sokkia Care site, the product registration is done via the myTopcon site/or by using the myTopcon NOW! app. It is free to create an account and register.
Page 8 Type and click Italic Reference to another manual or help document Refer to the Sokkia Reference Manual NOTE Further information to note about system configuration, maintenance or setup. Supplementary information that can have an adverse affect on system operation, NOTICE system performance, data integrity or measurements.
Page 9: Introduction
MAGNET Field for calculating the true projection of the rover antenna phase center on the ground. The GRX3 GNSS Receiver offers complete IP67 protection against dust and water ingress, in addition to superior vibration and shock resistance. The Sokkia communication interface allows you to integrate GNSS performance and quickly deliver world class positioning and navigation support to your applications.
Page 10: Grx3 Features
● TILT—Topcon Integrated Leveling Technology ● External power, USB and serial-data ports ● External GNSS antenna connector for GRX3 series receivers without an internal cellular module ● External cellular module antenna connector for GRX3 series receivers with an internal cellular module ●...
Page 11: Unpacking Your Receiver Kit
Hand-Held Controller and Brackets Prism Adapter 1. Components in the standard kits may differ based on your country or region. Contact your local Sokkia dealer to inquire about items included in your regional standard kit and accessories that are available with the receiver.
Page 12: Technical Documents
SRU software, see "Using Sokkia Software With Your Receiver". Using Sokkia Software With Your Receiver Use the GRX3 receiver in conjunction with the Sokkia Receiver Utility (SRU) and MAGNET Field data collection software or Pocket 3D machine control system applications for a precision positioning solution.
Page 13 1. A description of the following: ■ The field operation that was being performed when the problem occurred. ■ Details of the unexpected behavior, symptoms and any error messages that precede or follow the problem. ■ Problem occurrence frequency or patterns. 2.
Page 14: Website
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 and frequently asked questions. To access the Sokkia corporate website, visit https://sokkia.com. The Sokkia Care support and training website provides support for Sokkia registered users. Sokkia Care provides information about Sokkia products, training, events, firmware and software updates and troubleshooting procedures.
Page 15: Getting Acquainted
● Alinco UHF radio (available in Japan), with integrated 4G/LTE cellular module Figure 2-1 shows a GRX3 GNSS receiver without radio modems or a cellular module (P/N 1028556- 02). The lower part of the receiver contains the External GNSS antenna connector. The Reset button is located under the SIM card door in the lower part of the receiver.
Page 16 Figure 2-2: GRX3 with a UHF Without a Cellular Module Figure 2-3 shows a GRX3 GNSS receiver with an R2 Lite UHF modem (P/N 1028556-05) and with a cellular module. The upper part of the receiver includes a connector for the radio modem antenna.
Page 17: Receiver Enclosure-Display Panel
The SIM card door (Figure 2-5 on page 2-4) is located to the left of the LED Display Panel. To remove the SIM card door from the GRX3 use a flat blade screwdriver and remove the two screws. The Reset button is located under the SIM card door. For the GRX3 receivers with cellular module(s) installed, the SIM card slot is located there, too.
Page 18: Receiver Enclosure - Grx3 Hardware Reset Button
2. Insert a paper clip or any pointed stick small enough to fit into the pinhole of the Reset Button. 3. Gently press the Reset Button for about one second until the GRX3 powers off. 4. After the Reset Button is released, the GNSS receiver is automatically powered on.
Page 19: Receiver Enclosure-Bottom Overview Labels
Receiver Enclosure—Bottom Overview Labels 1. Reset button 3. SIM card door 2. SIM card slot (optional) 4. Screw (2) Attached to the bottom of the receiver enclosure are the regulatory and product identification labels. The product identification label contains the serial number (S/N) and part number (P/N) (Figure 2-6) for the receiver.
Page 20: Cables
P/N 14-008005-03 1. Components in the standard kit may differ based on your region. Contact your local Sokkia dealer to inquire about items included in your regional standard kit and accessories that are available with the receiver.
Page 21 Connects SAE connectors over longer distances. P/N 14-008022-01 External Antenna Cable (Optional) Connects the receiver to an external Sokkia GNSS antenna. P/N 1006447-01 Figure 2-7: Power Charge Cable—US P/N 1005793-01 Figure 2-8: Power Charge Cable—Europe P/N 1005794-01 P/N: 1030371-01 Cables...
Page 22: Accessories
(P/N 30-070003-01) and UHF frequency is 440-470 MHz (P/N 30-050501-01). ● Cell Antenna (P/N 1030630-01): This antenna is for use with the GRX3 versions that contain the integrated cellular modem. See Figure 2-3 on page 2-2 for the antenna location.
Page 23: Battery
The receiver has an internal, non-removable, rechargeable battery. The internal battery has two battery cells (packs) (Figure 2-9). For more information about using the battery see “Managing Power” on page 4-1. 1. Internal battery (two battery cells/packs—bottom view) Figure 2-9: GRX3 Internal Battery P/N: 1030371-01 Battery...
Page 24: External Connectors
Radio Modem Antenna Connector—The radio antenna of the UHF radio modem plugs to the external antenna connector on the GRX3 radome. The radio antenna uses a reverse polarity TNC or BNC connection depending on the installed radio modem. For additional Specification information see Table 9-3 on page 9-8.
Page 25: Receiver Enclosure Bottom-Connectors
The SMB connector that is used to connect an external GNSS antenna for use in both base and rover stations. This connector is not present in a GRX3 receiver with a cell module. ● Cellular module antenna connector (optional, present only within integrated cellular receivers)—...
Page 26: Display Panel
Display Panel The receiver has a highly-visible display panel with single-button operation. The LED display panel (Figure 3-1) allows for control of receiver power and data recording. The LEDs display the status of the satellite tracking, recording raw data to the internal memory, Bluetooth connections, cellular module status and battery state of charge.
Page 27: Led Display Panel
Static and three times in a row This function is available for “Occupation mode Kinematic post- within 1 second. switch” only. See Sokkia Receiver Utility (SRU) processing modes Help. Resetting 10-15 seconds Release the Power button when STAT LED turns Parameters magenta.
Page 28: Receiver Status Leds
Receiver Status LEDs There are six status LEDs to provide information about satellite tracking, recording, Bluetooth, cellular, radio and remaining internal battery life. This section describes the color and behavior of each LED. Status LED The tracking status LED displays the status of tracked satellites when the receiver is on. Table 3-3.
Page 29: Recording Led
Recording LED The recording LED indicates if memory storage is being used and displays the current survey mode (static or kinematic) when the Occupation mode switch is selected Table 3-4. Recording LED Descriptions Display LED Color Description LED blink mode switch is selected File logging is in progress.
Page 30: Communication Leds
Table 3-4. Recording LED Descriptions (Continued) File logging problem. No free memory or hardware problem with data recording. Red Solid LED is off when file is not logging data. Communication LEDs The communication LEDs display the status of the wireless activity. The following tables describe the communication activity for two use cases: Bluetooth and Radio modems.
Page 31: Cellular Led
Cellular LED The Cellular LED display the status of the internal cellular module. Table 3-6 describes the LED colors and the patterns for the cellular module. Table 3-6. Cellular LED Descriptions Display LED Color Description There is no internal cellular module or it is No Light switched off Cellular module is on and waiting for...
Page 32 Table 3-7. UHF Modem LED Descriptions (Continued) Display LED Color Description Green Solid Modem is not receiving correction data. Yellow Blink Modem is receiving correction data from a base. Transmitter mode (Base) Green Solid Modem is not transmitting correction data. Red Blink Modem is transmitting correction data.
Page 33: Battery Led
Battery LED The battery LED indicates the remaining charge of the internal battery. When using an external power source, the LED turns solid green and begins to blink if the internal battery is charging. See Table 3-8 for more information. Table 3-8.
Page 34 Table 3-8. Internal Battery LED Descriptions (Continued) Display LED Color Description The receiver is off The receiver is connected to an external power Green Solid source and the battery is fully charged. The receiver is connected to an external power Green Blink source;...
Page 35: Managing Power
Managing Power This chapter describes how to power the receiver, charge the battery and use an external power source. Turning the Receiver On/Off To turn on the receiver, press and hold the power button until the STAT LED turns solid green. The receiver is turning on when: the Power LED blinks green, the receiver channels initialize and start tracking all visible satellites at any time and location and the serial port is available.
Page 36: Operating Hours
Table 4-1 describes the use conditions and the operating hours of the receiver. The values in the Approximate Hours of Operation column are obtained when using the internal battery. Table 4-1. GRX3 Approximate Hours of Operation Approximate Hours of Use Condition...
Page 37: Charging The Battery
Charging the Battery While the battery loses charge, the BAT LED changes from solid green, to yellow and then red, depending on the remaining charge (see “Battery LED” on page 3-8). When the receiver is connected to an external power source, the internal battery is charging, regardless of the receiver state.
Page 38: Using An External Power Source
Using an External Power Source You can connect the receiver to an external power source (such as a vehicle battery with 9 – 27 VDC) to operate the receiver. Power input greater than 27 VDC could damage the receiver. CAUTION To connect the receiver to an external battery: 1.
Page 39: Configuration
Configuration The GRX3 receiver is primarily used for surveying land and construction job sites and to support static and RTK applications. You can also log data internally to a non-removable SD card. These logs can be downloaded from the receiver for static or kinematic surveying, mapping, monitoring and positioning applications.
Page 40: Loading New Firmware
Loading New Firmware This section of the configuration chapter describes how to update firmware on the GRX3 with a USB connection. To connect the receiver to your computer, use a Micro-USB cable (P/N 1013602-01) and USB drivers installed on the computer. USB drivers and firmware are available at Sokkia Care.
Page 41 The Select Device screen opens (Figure 5-3). 9. Select the specified COMX port for USB communication and then click OK. Sokkia GRX3 Figure 5-3: SRU—Select Device Screen The Connection Parameters screen opens (Figure 5-4). 10. Click Connect to establish a connection with the receiver.
Page 42 The Firmware Loading screen opens. 11. Click Firmware Loading The Select Target screen opens (Figure 5-5 on page 5-4). 12. Select Receiver from the Target drop-down list (Figure 5-5 on page 5-4). 13. Click Next. Figure 5-5: SRU—Select Target The Information screen opens (Figure 5-6). P/N: 1030371-01 Loading New Firmware...
Page 43 14. Click Next. GRX3 Sokkia Figure 5-6: SRU—Device Information Screen The Select Files screen appears (Figure 5-7 on page 5-5). 15. Click the button, browse to, and select the receiver’s *.tfi file. 16. Click Next. D:\FMW\GRX3\timage-b125-5.5.tfi Figure 5-7: SRU—Select Files...
Page 44 The firmware update may take up to 10 minutes. After the firmware update completes, the receiver returns to the normal operation mode. The procedure for loading new firmware into the GRX3 can be performed using NOTE MAGNET Field software version 5.1 and higher.
Page 45: Option Authorization Files
Sokkia’s OAF system allows you to customize and configure the receiver according to your particular requirements. The GRX3 receiver is typically shipped with an OAF based on the initial purchase of the receiver kit configuration. There are several upgrade options available with the receiver that can extend the receiver’s functionality to better suit your job requirements.
Page 46 The Receiver Options window opens (Figure 5-10). Here you can view the current authorization options and upload new ones. Figure 5-10: SRU—Receiver Options P/N: 1030371-01 Option Authorization Files...
Page 47: Loading An Oaf
Loading an OAF Sokkia dealers provide customers with OAF files. For any OAF related questions, e-mail Sokkia at options@topcon.com and include the receiver’s ID and serial number. To obtain these numbers, see “Getting Technical Support” on page 1-4. 1. Complete the steps in “Checking the Receiver’s OAF” on page 5-7 above.
Page 48 5. Click Upload the File to the Receiver to start loading the file (Figure 5-13). Figure 5-13: Upload OAF to the Receiver 6. Click Yes at the prompt to reset the receiver (Figure 5-14). Figure 5-14: Reset Receiver The Connection Parameters screen opens. 7.
Page 49 10. To view additional OAF details, right click in the Receiver Options window and select View > Detailed (Figure 5-15). Figure 5-15: Additional OAF Details The procedure for loading new firmware into the GRX3 can be performed using NOTE MAGNET Field software version 5.1 and higher.
Page 50: Performing A Factory Reset
Performing a Factory Reset The receiver’s Non-Volatile Random Access Memory (NVRAM) holds data required for satellite tracking, such as ephemeris data and receiver position. The NVRAM also keeps the current receiver’s settings, such as active antenna input, elevation masks and recording interval and information about the receiver’s internal file system.
Page 51: Perform A Factory Reset Using The Led Display
7. Click Factory Reset. Figure 5-16: Tools Screen 8. Click Yes at the prompt to reset the receiver. Figure 5-17: Reset Receiver SRU resets the receiver and clears the NVRAM. Perform a Factory Reset Using the LED Display 1. Press and hold the Power button for 30–35 seconds. Release it when STAT LED turns red. 2.
Page 52: Using Tilt Correction
The receiver contains the internal HIMU (Hybrid Inertial Measurement Unit) module. The module includes a 3D gyroscope, 3D accelerometer, and 3D magnetometer. GNSS firmware of the GRX3 contains the ELC (Electronic Level and Compass) program module. This module uses the measured parameters from the HIMU, receiver navigation coordinates from the GNSS firmware and magnetic field map for calculation of tilt angles in the horizontal plane, and true (not magnetic) azimuth and magnetic field values.
Page 53: Himu Calibration
● If using the UHF modem, connect the radio antenna and turn on the radio modem. ● Do not use an external power source. You can use MAGNET Field or SRU to calibrate the ELC module of the GRX3 receiver. 5-15...
Page 54 1. Set up the receiver on a tripod with a universal tribrach and tribrach adapter: ● Level the tribrach. ● Set the receiver on a tribrach adapter with a 100 mm aluminum prism spacer. ● Eliminate any vibrations during the calibration. GRX3 Rotating tribrach adapter 100 mm prism spacer 4. Tribrach Figure 5-20: Receiver and Tribrach Set Up The receiver tracks satellites and determines a position.
Page 55 3D Compass Calibration To take an accurate compass reading, first you need to perform the compass calibration procedure for each location in 3D, before starting a survey. Be sure to calibrate the level (see “Level Calibration” on page 5-16), before NOTICE calibrating the compass.
Page 56 ● Set the receiver on a tribrach adapter with a 100 mm aluminum prism spacer. ● Set the receiver at a 90-degree angle to the horizontal plane to maximize the accuracy of the calibration. ● Eliminate any vibrations during the calibration. GRX3 Rotating tribrach adapter 100 mm prism spacer 4. Tribrach Figure 5-22: Receiver and Tribrach Set Up The receiver tracks satellites and determines a position.
Page 57 ● If you do not make any turns for two minutes, the calibration routine automatically stops. Perform the procedure again until you have successfully filled the entire sphere. ● If you successfully complete all of the turns, MAGNET Field/SRU shows, “Calibration has completed.”...
Page 58: System Setup
System Setup The base receiver transmits RTK corrections to the rover receiver using either SiteComm wireless technology or UHF modem. The internal cell module receives correction data from reference GNSS networks. This chapter describes the field setup for base or RTK rover usage. Setting Up the Base Receiver 1.
Page 59 3. Attach the antenna to the UHF modem antenna connector. 4. Level the tripod and tighten the screws. 5. If needed, attach any other accessories, such as a back-up power supply. 6. Measure the height of the receiver from the ground using the tape measure. See “Measuring Antenna Height”.
Page 60: Setting Up The Rover Receiver
If you are using a cellular module in Network RTK configuration, ensure that the NOTICE cellular antenna is attached to the GRX3 receiver. 5. Press the Power button to turn on the receiver. The integrated wireless device inside the receiver turns on when the receiver is powered.
Page 61 ● Select for the receiver with the cell module: ○ The type of correction data that will be used for survey (VRS or Single Base or MAGNET Relay) ○ The protocol of the input correction data: TCP/IP or NTRIP 2.0/1.0 or NTRIP 1.0 ○...
Page 62: Using Grx3 With External Antenna
Using GRX3 with External Antenna The GRX3 GNSS receiver can be used with an external antenna. The GRX3 receiver is primary designed for using with Sokkia active (with LNA) external antenna. Sokkia cannot guarantee the correct performance with other brands of GNSS CAUTION antenna.
Page 63: Measuring Antenna Height
After this change the receiver will track GNSS signals only with external antenna. When the external antenna is selected, the GRX3 supplies a voltage in the range from +4.5 V to +5.5 V to the central pin of the SMB antenna connector. Maximum antenna current equals to 120 mA.
Page 64 ● Model of the antenna/receiver used Any necessary antenna phase center adjustments, based on the antenna model, are automatically applied. These adjustments, when combined with accurately measured height and measurement methods, allow for correctly computed reference marker coordinates. To accurately measure the antenna height, do the following: 1.
Page 65: Collecting Data
Memory The GRX3 is equipped with an internal 8 GB memory card. The memory card is formatted as FAT32. To access the raw, "*.tps" data files on the memory card, see “Managing Files” on page 7-5.
Page 66: Recording Data Using Sokkia Receiver Utility (Sru)
With the Power button, you can record up to 16 raw, "*.tps" data files. NOTE Recording Data Using Sokkia Receiver Utility (SRU) To start recording data using Sokkia Receiver Utility (SRU): 1. Press the Power button to turn on the receiver. 2. Wait for the Power LED to stop blinking green.
Page 67 8. Select Edit to open the Log screen and specify individual settings such as Elevation Mask, Prefix and Rotation Period. To use these log parameters after pressing the MINTER, select Use for MINTER & AFRM (Figure 7-2). Figure 7-2: Context Menu of Logs Tab 9.
Page 68 Recording Data with Default Settings To start recording data to the selected file with default settings do the following. 1. Right click on the desired file to open the context menu. 2. Select Start File Logging (Default Settings). The currently logging file shows in the Logs tab (Figure 7-4). Figure 7-4: Start File Logging With Default Settings Recording Data with Manual Settings You can specify the logging parameters manually.
Page 69: Managing Files
After establishing a connection between the GRX3 receiver and a computer or controller using a USB cable: ● The GRX3 receiver is ready to upload and download files between the receiver’s memory and the controller or computer’s storage. Windows Explorer shows the receiver’s memory storage as a USB drive with the GRX3 folder.
Page 70 You can use Windows Explorer to upload and download files to and from the GRX3 receiver. ● The GRX3 receiver is not ready to record "*.tps" data files to memory storage. SRU can not access the memory storage or update the firmware.
Page 71 You can not update the firmware. If you try to update the firmware, the error message in Figure 7-11 shows. Figure 7-11: SRU—Not Enough Flash Memory Error ● The GRX3 receiver is ready for configuration of other receiver settings. Managing Files P/N: 1030371-01...
Page 72 Ejecting the Receiver from Windows and Mounting in SRU When the GRX3 receiver is connected by USB, use the Safely Remove Hardware and Eject Media feature in Windows to prepare the receiver for any of the following tasks: ● Recording "*.tps" data files to memory storage ●...
Page 73 The Files tab window shows “Initializing,” then populates the internal memory information (File System Info, Status, and etc.). 8. Click to open the Logs tab. The GRX3 is ready to record "*.tps" data files to memory storage. SRU can access files in the memory storage. Managing Files...
Page 74: Downloading Data Files Using Sru
Downloading Data Files Using SRU When a survey is completed, you can download "*.tps" data files to a computer for storage, post- processing or backup. To download raw, "*.tps" data files from the receiver to a computer, do the following. 1.
Page 75: Deleting Data Files From The Receiver Memory Using Sru
Figure 7-18: Downloading "*.tps" data file(s) to Computer Deleting Data Files from the Receiver Memory Using SRU When the memory is full, the receiver stops logging data and the REC LED turns dark/off, indicating an error condition. Existing data are not overwritten. To delete raw, "*.tps"...
Page 76: Troubleshooting
See “Cellular Module RF Connector” on page 9-9 for external power requirements. ● Check the software. Make sure the most current software version is downloaded onto the computer and the most current firmware is loaded into the receiver. Check the Sokkia Care website for the latest updates.
Page 77: Receiver Problems
Generic problems: ● The receiver port used for connection is not in Command mode. a. Connect the receiver to a computer and open SRU (see “Connection” in the Sokkia Receiver Utility (SRU) Help embedded in the software). b. Click Receiver Settings > Ports.
Page 78 Connect the receiver to a computer and open SRU (see “Connection” in the Sokkia Receiver Utility (SRU) Help embedded in the software). b. In SRU, connect to the receiver. c. On the SRU main screen, choose Receiver Settings > Tracking > Adv tab. Make sure the C/A code multipath reduction check box is selected.
Page 79 The receiver does not start logging data ● The receiver’s memory is disabled or expired. ○ Make sure the memory option is enabled. For details, see the Sokkia Receiver Utility (SRU) Help. ● The internal memory does not have free space.
Page 80: Bluetooth Problems
○ Disconnect the receiver from the other controller or computer. ● The receiver port used for connection is not in Command mode. a. Connect the receiver to a computer and open SRU (see “Connection” in the Sokkia Receiver Utility (SRU) Help embedded in the software).
Page 81: Sru Problems
○ Use a computer or receiver that has Bluetooth wireless technology enabled/installed. ○ Make sure the computer and receiver use the correct ports for communication—For the GRX3 receiver, this is Bluetooth serial port A (btsp\a). SRU error message: Not enough flash memory is available. To update the firmware using selected firmware image format, there must be a properly formatted flash card in the receiver, which has enough free space to allocate the firmware file.
Page 82: Cleaning And Storing The Receiver
Getting Customer Support If the troubleshooting hints and tips in this operator’s manual fail to remedy the problem, contact your local Sokkia dealer or visit Sokkia Care (https://us.sokkia.com/sokkia-care) for technical support. For contact information, see “Getting Technical Support” on page 1-4.
Page 83: Specifications
Specifications This chapter describes the internal component specifications for the GRX3. General Details Table 9-1 lists the receiver’s general specifications. Table 9-1. General Receiver Specifications Item Specification Physical Enclosure Magnesium Alloy housing Color Sokkia Gray/Blue bumper Dimensions (mm) 149 (w) x 149 (l) x 94.6 (h) Weight (kg) 1.061...
Page 84 For the GRX3 without a Modem: Using new, fully-charged ● Modem off – 15 hours battery, operating at room For the GRX3 with R2 Lite UHF and 4G/LTE temperature and transmitting at 1-Hz rate. ● UHF, Receive-only UHF mode – 10 hours ●...
Page 85 Table 9-1. General Receiver Specifications (Continued) Item Specification Charging Time Approximate – 5 hours for full charge using manufacturer- supplied battery charging cradle (P/N 1010975-02) and adapter (P/N 1005556-01). On-board Backup battery for timekeeping and almanac data storage; minimum 10 years of operation GNSS Receiver Board Details Number of Channels 226 GNSS channels Vanguard Technology™...
Page 86 Table 9-1. General Receiver Specifications (Continued) Item Specification Data Logging Support for sixteen simultaneous sessions Advanced file/folder system Memory Type of Memory SD (Secure Digital) non-removable card Capacity 8 GB pre-installed Number of Files Up to 4000 Logging Size 6.0 MB per hour (32 SVs, 1-second, L1/L2, default message set) Logging Interval 0.01 –...
Page 87 Table 9-1. General Receiver Specifications (Continued) Item Specification Output Interval 1-Hz standard; 5, 10, 20 Hz optional DGPS Correction Format RTCM SC104 Version 2.x and 3.x RTCM Message Type 1, 3, 9, 31, 32, 34—user selectable Process Interval 1-Hz standard; 10, 20 Hz optional Output Interval for RTCM 1-Hz standard;...
Page 88 Table 9-1. General Receiver Specifications (Continued) Item Specification SBAS Horizontal <1.0 meter Vertical <1.5 meter Topnet Live Starpoint (Pro) Horizontal <0.1 meters (95%) Vertical <0.2 meters (95%) PPP correction service Precision Static Horizontal 3 mm + 0.1 ppm Vertical 3.5 mm + 0.4 ppm Static/Fast Static Horizontal 3 mm + 0.4 ppm (x baseline length) Vertical 5 mm + 0.5 ppm (x baseline length)
Page 89: R2 Lite Uhf Internal Modem Board Details (Optional)
R2 Lite UHF Internal Modem Board Details (Optional) Table 9-2 lists GRX3’s optional R2 Lite UHF modem specifications. Table 9-2. R2 Lite UHF Internal Modem Board Specifications Item Specification Operating Frequency 406 – 470 MHz for Rover and Base Range Channel Spacing 6.25 KHz...
Page 90: Bluetooth Module Details
North America and Europe Connector Specifications GRX3 has one antenna connector for radio transmission/reception and four data and port connectors for power, serial communication, micro-USB and the external GNSS antenna or external cellular antenna. The SiteComm and Bluetooth antennas are internal.
Page 91: Radio (Modem) Rf Connector
Radio (Modem) RF Connector The modem connector (Table 9-4) is a BNC connector for UHF radio. Table 9-4. Modem Connector Specifications Modem Type Signal Type Details Modem I/O RF output from modem antenna Cellular Module RF Connector The cellular module connector specifications are listed below in Table 9-5. Table 9-5.
Page 92: Serial Rs-232 Connector
Table 9-6 describes power connector specifications. Table 9-6. Power Connector Specifications Number Signal Name Details Power_INP 9 – 27 volts DC input Power_INP 9 – 27 volts DC input Power_GND Ground, power return Power_GND Ground, power return Aux_Power 9 – 27 volts DC input Serial RS-232 Connector The Serial RS-232 connector (Figure 9-2) is a sealed receptacle, 7 pin, ODU (P/N G80F1C-T07QC00-0000).
Page 93: Micro-Usb Connector
Micro-USB Connector The micro-USB connector is a standard 5-pin, micro-USB, A/B connector (Figure 9-3). Figure 9-3: USB Connector for GGD Options Table 9-8 describes the micro-USB connector specifications. Table 9-8. Micro-USB Specifications Number Signal Name Details USB_PWR Bus power input USB D- Data minus USB D+...
Page 94: Product Identification
Product Identification The GRX3 receiver is available in the configurations and assembly part numbers shown in Table 10-1. The corresponding part numbers for the radio and cellular antennas to be paired with the receiver configuration are as indicated. Receiver assembly variants may differ based upon your country or region.
Page 95: Safety Warnings
Safety Warnings General Warnings To comply with RF exposure requirements, maintain at least 37 cm between the CAUTION user and the radio modem. TPS receivers are designed for survey and survey related uses (that is, surveying coordinates, distances, angles and depths and recording such measurements). This product should never be used: ●...
Page 96: Receiver Warnings
Receiver Warnings Tampering with the receiver by the end users or non-factory authorized technicians will void the receiver’s warranty: ● Do not attempt to open the receiver and modify any of its internal components. CAUTION ● Do not charge in conditions different than specified. ●...
Page 97: Regulatory
Regulatory The chapter provides information about this product’s compliance with government regulations for use. FCC Compliance This equipment complies with FCC radiation exposure limits set forth for uncontrolled equipment and meets the FCC radio frequency (RF) Exposure Guidelines in Supplement C to OET65. This equipment has very low levels of RF energy that it deemed to comply without maximum permissive exposure evaluation (MPE).
Page 98: Community Of Europe Compliance
The GRX3 UHF (406-470 MHz) is allowed to be used in the following countries, either on license free channels or on channels where the operation requires a license. Additional detailed information is available at the local frequency management authority.
Page 99: Declaration Of Conformity
Declaration of Conformity (Radio Equipment Directive 2014/53/EU) esky (Sokkia) tímto prohlašuje, že tento (GRX3) je ve shod se [Czech] základními požadavky a dalšími píslušnými ustanoveními smrnice 2014/53/ES. Dansk Undertegnede (Sokkia) erklærer herved, at følgende udstyr [Danish] (GRX3) overholder de væsentlige krav og øvrige relevante krav i direktiv 2014/53/EF.
Page 100: Weee Directive
(Sokkia) declara que este (GRX3) está conforme com os [Portugues] requisitos essenciais e outras disposições da Directiva 2014/53/CE. Slovensko (Sokkia) izjavlja, da je ta (GRX3) v skladu z bistvenimi [Slovenian] zahtevami in ostalimi relevantnimi doloili direktive 2014/53/ES. Slovensy (Sokkia) týmto vyhlasuje, že (GRX3) spa základné...
Page 101: Bluetooth Transmission Statements/Compliance
Bluetooth Transmission Statements/Compliance This Bluetooth device is compliant to the following profiles of the core spec version 2.1/2.1+EDR: ● Baseband ● HCI ● Link Manager ● Radio The radio has been tested using the maximum antenna gain of 2.3 dBi and the Bluetooth qualification is valid for any antenna with the same or less gain.
Page 102: Warranty
Sokkia dealer.1 During the warranty period, Sokkia will, at its option, repair or replace this product at no additional charge. Repair parts and replacement products will be furnished on an exchange basis and will be either reconditioned or new.
Page 103 L2—The secondary L-band carrier used by GPS, GLONASS and QZSS satellites to transmit satellite data. Light Emitting Diodes (LEDs)—These LEDs are used as indicator lights on the GRX3 receiver to display the status of the receiver’s components and to control receiver operations.
Page 104 Sokkia Receiver Utility (SRU)—Hardware configuration software designed for GNSS receivers and peripheral devices. SRU software can be downloaded from the Sokkia Care site: https://us.sokkia.com/sokkia-care-products/sru-sokkia-receiver-utility. Static Survey—Typically uses a network or multiple baseline for positioning. The static survey method provides the highest accuracy and requires the longest observation times.
Page 105 Concerns regarding this Sokkia product may be sent to Service and Repair Department, Concerns regarding this Sokkia product may be sent to Service and Repair Department, Topcon Positioning Systems, Inc., 7400 National Drive, Livermore, California 94550 Topcon Positioning Systems, Inc., 7400 National Drive, Livermore, California 94550...

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