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Summary of Contents for Hexagon NOVATEL GT7800
- Page 1 GT7800 GNSS Timing Synchronization Receiver User Manual GT7800 Timing Synchronization Receiver User Manual v1 April 2024...
- Page 2 NovAtel, OEM7 and VEXXIS are trademarks of Hexagon AB and/or its subsidiaries and affiliates, and/or their licensors. All other trademarks are properties of their respective owners. © Copyright 2017 – 2024 Hexagon AB and/or its subsidiaries and affiliates. All rights reserved. A list of entities within the Hexagon Autonomy & Positioning division is available at hexagon.com/company/divisions/autonomy-and-positioning.
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Page 3: Table Of Contents
Table of Contents Notices Customer Support Chapter 1 GT7800 Overview 1.1 GT7800 Connectors 1.2 GT7800 Status LEDs 1.3 NovAtel User Documentation, PC Software and Drivers Chapter 2 GT7800 Installation 2.1 Box Contents 2.2 Additional Equipment Required 2.3 Installation Overview 2.3.1 Restarting the Receiver APPENDIX A GT7800 Technical Specifications A.1 GT7800 Performance Specifications A.2 GT7800 Mechanical Specifications... - Page 4 Notices Federal Communications Commission (FCC) and Innovation, Science and Economic Development (ISED) Canada This equipment has been tested and found to comply with the limits for a Class A digital device, pursuant to Part 15 of FCC Rules. These limits are designed to provide reasonable protection against harmful interference when the equipment is operated in a commercial environment.
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Page 5: Customer Support
If using NovAtel Application Suite, log the Troubleshooting message set for 15 minutes. 3. Send the data file to NovAtel Customer Support: support.novatel@hexagon.com 4. You can also issue a FRESET command to the receiver to clear any unknown settings. The FRESET command will erase all user settings. You should know your configuration (by requesting the RXCONFIGA log) and be able to reconfigure the receiver before you send the FRESET command. - Page 6 Customer Support E-mail: support.novatel@hexagon.com Telephone: U.S. and Canada: 1-800-NOVATEL (1-800-668-2835) International: +1-403-295-4900 General Troubleshooting Logs LOG RXSTATUSB ONCHANGED LOG RAWEPHEMB ONNEW LOG GLORAWEPHEMB ONNEW LOG BESTPOSB ONTIME 1 LOG RANGEB ONTIME 0.5 LOG RXCONFIGA ONCE LOG VERSIONA ONCE LOG LOGLISTA ONCE LOG PORTSTATSA ONTIME 10...
- Page 7 Customer Support For interference issues add this log: LOG ITPSDDETECTB ONNEW For interference issues, when you have enough datalink bandwidth to handle large logs, add this log: LOG ITPSDFINALB ONNEW RTK Troubleshooting Logs LOG RXSTATUSB ONCHANGED LOG RAWEPHEMB ONNEW LOG GLORAWEPHEMB ONNEW LOG QZSSRAWEPHEMB ONNEW LOG BDSRAWNAVSUBFRAMEB ONNEW LOG GALFNAVRAWEPHEMERISB ONNEW...
- Page 8 Customer Support PPP Troubleshooting Logs LOG RXSTATUSB ONCHANGED LOG GPSEPHEMB ONNEW LOG GLOEPHEMERISB ONNEW LOG QZSSEPHEMERISB ONNEW LOG BDSEPHEMERISB ONNEW LOG BDSBCNAV1EPHEMERISB ONNEW (firmware versions 7.08.03 and 7.08.10 and later) LOG BDSBCNAV2EPHEMERISB ONNEW (firmware versions 7.08.03 and 7.08.10 and later) LOG BDSBCNAV3EPHEMERISB ONNEW (firmware versions 7.08.03 and 7.08.10 and later) LOG GALFNAVEPHEMERISB ONNEW LOG GALINAVEPHEMERISB ONNEW...
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Page 9: Chapter 1 Gt7800 Overview
The GT7800 is a GNSS Timing Synchronization Receiver that uses the OEM729 receiver from Hexagon | NovAtel to provide highly precise timing when used on its own or connected to an external oscillator. Standard interfaces are provided through conventional connectors, eliminating the need for hard to find and expensive custom cables. -
Page 10: Gt7800 Connectors
Chapter 1 GT7800 Overview 1.1 GT7800 Connectors Figure 2: GT7800 Connectors Table 1: GT7800 Connectors Port Name Connector Description ANTENNA Connects to a GNSS antenna. Connects to an external oscillator. Some applications require greater precision than is possible with the OEM7 VCTCXO. - Page 11 Chapter 1 GT7800 Overview Port Name Connector Description Connects to a computer network. ETHERNET RJ-45 See GT7800 Data Communication Specifications on page 23 for port specifications. Connects to a computer USB port. USB 0 Micro-A/B See GT7800 Data Communication Specifications on page 23 for port specifications.
- Page 12 Chapter 1 GT7800 Overview Table 2: COM Ports COM 1 COM 1 COM 2 COM 3 (RS-232) (RS-422) (RS-232) (RS-232) No connection No connection No connection No connection RxD1 RxD1+ RxD2 RxD3 TxD1 TxD1+ TxD2 TxD3 No connection No connection No connection No connection Ground Ground Ground...
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Page 13: Gt7800 Status Leds
Chapter 1 GT7800 Overview 1.2 GT7800 Status LEDs Table 4: GT7800 Status LEDs Left LED Stack from Top Right LED Stack from Top LED Name Color Description LED Name Color Description Not used Not used STATUS GRN Not used M.E. READY Not used Lights when the receiver STATUS RED Not used... -
Page 14: Chapter 2 Gt7800 Installation
Chapter 2 GT7800 Installation This chapter provides instructions to install the GT7800 and create a GNSS receiver system. 2.1 Box Contents The following is provided with your NovAtel GT7800 receiver: GT7800 receiver enclosure DC power cable assembly (PN: 01019538) 2 metre USB cable type A to micro B (PN: 60723119) 2.2 Additional Equipment Required... -
Page 15: Installation Overview
2.3 Installation Overview Use the following steps to install and power the GT7800. Figure 3: GT7800 Installation Example 1. Install a quality GNSS antenna in a location with an unobstructed view of the sky. 2. Connect a coaxial cable from the antenna to the Antenna port. 3. -
Page 16: Restarting The Receiver
Chapter 2 GT7800 Installation The signal on EVENT OUT 2 is controlled by the MARK1 option of EVENTOUTCONTROL (e.g. EVENTOUTCONTROL MARK1 ENABLE). 6. Connect the communications equipment to the GT7800 communication ports. For an RS-232 serial connection, use the COM 1, COM 2 or COM 3 port. For a USB connection, use the USB 0 port. -
Page 17: Appendix A Gt7800 Technical Specifications
APPENDIX A GT7800 Technical Specifications Table 6: GT7800 Physical Description Size 160 mm x 190 mm x 62.5 mm Weight 500 grams See the following sections for more information about the GT7800: GT7800 Performance Specifications on the next page GT7800 Mechanical Specifications on page 20 GT7800 Electrical and Environmental Specifications on page 21 GT7800 Data Communication Specifications on page 23 GT7800 Strobe Specifications on page 24... -
Page 18: Gt7800 Performance Specifications
A.1 GT7800 Performance Specifications All specifications are subject to GNSS system characteristics. Table 7: GT7800 Receiver Performance L1 C/A, L1C, L2C, L2P, L5 GLONASS L1 C/A, L2 C/A, L2P, L3 BeiDou B1I, B1C, B2I, B2a, B2b, B3I Galileo E1, E5 AltBOC, E5a, E5b, E6 Signals Tracked QZSS L1 C/A, L1C, L1S, L2C, L5, L6... - Page 19 APPENDIX A GT7800 Technical Specifications Time Accuracy <5 ns RMS Velocity Accuracy <0.03 m/s RMS Code Carrier 4 cm L1 C/A 0.5 mm L2 P(Y) 8 cm 1.0 mm 8 cm 0.5 mm 3 cm 0.5 mm L1 C/A 8 cm 1.0 mm 8 cm GLONASS...
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Page 20: Gt7800 Mechanical Specifications
APPENDIX A GT7800 Technical Specifications A.2 GT7800 Mechanical Specifications In the following diagrams, the dimensions are in millimetres. Figure 4: GT7800 Dimensions GT7800 Timing Synchronization Receiver User Manual v1... -
Page 21: Gt7800 Electrical And Environmental Specifications
APPENDIX A GT7800 Technical Specifications A.3 GT7800 Electrical and Environmental Specifications Table 8: GT7800 Environmental Specifications Operating Temperature 0°C to +55°C Storage Temperature -40°C to +75°C IEC 61000-4-2 Table 9: GT7800 Power Requirements Voltage +9 to +36 VDC 2.0 W typical Power Typical values using serial port communication without interference mitigation Consumption... - Page 22 APPENDIX A GT7800 Technical Specifications GPS L1: 1575.42 MHz GPS L2: 1227.60 MHz GPS L5: 1176.45 MHz GLONASS L1: 1593-1610 MHz GLONASS L2: 1237-1254 MHz GLONASS L3: 1202.025 MHz Galileo E1: 1575.42 MHz Galileo E5a: 1176.45 MHz Galileo E5b: 1207.14 MHz RF Input Frequencies Galileo E5:...
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Page 23: Gt7800 Data Communication Specifications
APPENDIX A GT7800 Technical Specifications A.4 GT7800 Data Communication Specifications Table 12: Data Communications Interfaces COM 1 Connector DB9 male Electrical format RS-232/RS-422 Data rates 2400, 4800, 9600 (default), 19200, 38400, 57600, 115200, 230400 or 460800 bit/s. RS-232: TxD1, RxD1, RTS1, CTS1 Signals supported RS-422: TxD1+, TxD1-, RxD1+, RxD1- COM 2... -
Page 24: Gt7800 Strobe Specifications
APPENDIX A GT7800 Technical Specifications USB 0 Connector Micro A/B Electrical format Conforms to USB 2.0 Data rates Full-speed (12 Mb/s) Signals supported USB D (+), USB D (-) ETHERNET Connector RJ45 Physical layer 10BASE-T/100BASE-TX A.5 GT7800 Strobe Specifications The GT7800 strobe signals are available on the EVENT BNC connectors. Table 13: GT7800 Strobes Description Factory Strobes... -
Page 25: Gt7800 Power Cable
APPENDIX A GT7800 Technical Specifications A.6 GT7800 Power Cable The NovAtel part number for the GT7800 DC Power Cable is 01019538. This cable provides power to the receiver from an external power supply. In the following diagram, the dimensions are in millimetres. Figure 5: GT7800 Power Cable Table 15: GT7800 DC Power Connector Connector... - Page 26 APPENDIX A GT7800 Technical Specifications GT7800 Timing Synchronization Receiver User Manual v1...
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