Quectel L76 Series User Manual
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Quectel L76 Series User Manual

Gnss module
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L76 Series
EVB User Guide
GNSS Module Series
Version: 2.1
Date: 2021-08-05
Status: Released

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Summary of Contents for Quectel L76 Series

  • Page 1 L76 Series EVB User Guide GNSS Module Series Version: 2.1 Date: 2021-08-05 Status: Released...
  • Page 2 To the maximum extent permitted by law, Quectel excludes all liability for any loss or damage suffered in connection with the use of the functions and features under development, regardless of whether such loss or damage may have been foreseeable.
  • Page 3 GNSS Module Series Copyright The information contained here is proprietary technical information of Quectel. Transmitting, reproducing, disseminating and editing this document as well as using the content without permission is forbidden. Offenders will be held liable for payment of damages. All rights are reserved in the event of a patent grant or registration of a utility model or design.

  • Page 4: Safety Information

    The following safety precautions must be observed during all phases of operation, such as usage, service or repair of any terminal incorporating Quectel L76-LB module. Manufacturers of the terminal should send the following safety information to users and operating personnel, and incorporate these guidelines into all manuals supplied with the product.

  • Page 5: About The Document

    GNSS Module Series About the Document Document Information Title L76 Series EVB User Guide Subtitle GNSS Module Series Document Type EVB User Guide Document Status Released Revision History Version Date Description 2013-02-25 Initial 2013-03-26 Optimized the contents of Chapter 3.

  • Page 6: Table Of Contents

    GNSS Module Series Contents Safety Information ............................3 About the Document ..........................4 Contents ..............................5 Table Index ..............................6 Figure Index ..............................7 Introduction ............................8 General Overview ..........................9 2.1. EVB Kit Accessories ........................9 2.2. Connecting Cables and Antenna to EVB ................. 10 Board User Interfaces ........................
  • Page 7 GNSS Module Series Table Index Table 1: List of Accessories ........................10 Table 2: Detailed EVB Interfaces ....................... 12 Table 3: J106 Pin Detailed Description ...................... 13 Table 4: Explanation of QGNSS Interface ....................17 Table 5: Related Documents ........................30 Table 6: Terms and Abbreviations ......................
  • Page 8 GNSS Module Series Figure Index Figure 1: EVB Kit Accessories ........................9 Figure 2: EVB and Accessories Assembly ....................10 Figure 3: EVB Top View ..........................11 Figure 4: USB Port ............................. 14 Figure 5: COM Port Setting Interface of QCOM ..................14 Figure 6: NMEA Sentences Output by Module –...

  • Page 9: Introduction

    Introduction This document provides info on the steps needed to evaluate the Quectel L76 series modules using the Evaluation Board (EVB). The EVB is a reference tool that allows you to become familiar with the L76 series modules. Specifically, the document is divided into several sections: ⚫...

  • Page 10: General Overview

    The EVB Kit includes Evaluation Board (EVB), Active GNSS Antenna, Micro-USB Cable, Bolts and Coupling Nuts. You can download the software tools (QCOM, QGNSS, QGPSFlashTool) from our website Download Zone or request them from Quectel Technical Supports. The EVB Kit accessories are shown in the figure below, and check Table 1 for details.

  • Page 11: Connecting Cables And Antenna To Evb

    Size: 60 mm × 70 mm USB Cable Micro-USB Cable Active GNSS Antenna GNSS Antenna Request the Antenna Datasheet from Quectel Technical Supports. A sheet that lists instructions: how to connect the EVB, Instruction Sheet details on EVB accessories, and much more.

  • Page 12: Board User Interfaces

    GNSS Module Series Board User Interfaces 3.1. EVB Top View EVB top view is shown in the figure below. J106 J101 U101 Test points Antenna connector L76 series module S101 STANDBY switch D101 J301 1PPS and TXD UART connector indication LEDS J201...
  • Page 13 GNSS Module Series Table 2: Detailed EVB Interfaces Function Interfaces Description Power supply input: J201 ⚫ Power Supply DC power supply: 4.5–5.5 V, typ. 5.0 V Micro-USB ⚫ Current capability should be > 100 mA J201 NMEA sentence output and command input Micro-USB User Interface J301...
  • Page 14 GNSS Module Series Test point distribution is shown below: J106 Pin Assignment: 32K/DRIN AADET_N 1PPS STANDBY TIMER RESET TXD1 RXD1 Table 3: J106 Pin Detailed Description Pin Name Description 32K/DRIN AADET_N 1 pulse per second 1PPS Enters or exits the standby mode STANDBY Ground An open drain output signal which controls the ON/OFF status...

  • Page 15: Using Qcom Tool To Communicate

    Step 4: View the USB port numbers in the Device Manager, as shown in the figure below. Figure 4: USB Port Step 5: Install the QCOM tool provided by Quectel. The COM Port Setting interface of QCOM is shown in the figure below.
  • Page 16 GNSS Module Series Step 8: Click “Open Port” as shown in Figure 5 above, then the communication with EVB is established successfully. In this case, the NMEA sentences output by the module will be displayed through the QCOM tool, as shown in Figure 6 below. For more information about QCOM usage, see document [1] Figure 6: NMEA Sentences Output by Module –...

  • Page 17: Using Qgnss Tool To Test

    Step 2: Set the power switch (S201) to ON position in order to power on the EVB and switch S301 to USB position. Step 3: Start the QGNSS and click “Setting” and “Serial Port Configuration” (the L76 series supports 9600 bps by default), as shown in the figure below.

  • Page 18: Interface Explanation

    GNSS Module Series Step 4: Click the “Connect or disconnect” button. After connecting the module, the interface as shown in the figure below. Figure 8: QGNSS Interface (Connected) 5.1.1. Interface Explanation You can view GNSS information, such as CNR info, time, position, speed, and precision in the QGNSS interface.
  • Page 19 GNSS Module Series GPS satellite BeiDou satellite GLONASS satellite Galileo satellite QZSS satellite NavIC satellite ⚫ PRN 30 CNR is 39 dB/Hz. ⚫ Column in bright red means that the navigation data of the satellite is in use. ⚫ PRN 1 CNR is 21 dB/Hz. ⚫...

  • Page 20: Ttff Testing

    GNSS Module Series 5.2. TTFF Testing The QGNSS tool allows you to execute TTFF (Time to First Fix) testing under the following testing conditions: ⚫ Full cold start ⚫ Cold start ⚫ Warm start ⚫ Hot start QGNSS configuration steps for TTFF testing: Step 1: Click the “Tools”...
  • Page 21 GNSS Module Series Step 3: AGNSS is optional when testing TTFF with QGNSS , as shown in the figure below. Click “Set AGNSS” button to set up online AGNSS. For more information, see Chapter 5.3.1. Figure 11: AGNSS Setting Step 4: Click on the “Run” button to start the test. OR Click on the “Stop”...

  • Page 22: Agnss Setting

    GNSS Module Series Step 5: View the test results displayed visually in charts as shown in the figure below. The test results are stored in the directory where the tool is installed. Figure 13: Test Results 5.3. AGNSS Setting There are two ways to use AGNSS to improve the TTFF. 5.3.1.
  • Page 23 GNSS Module Series Figure 15: Assistant GNSS Online Setting Step 3: After clicking the “Connect” button, select online AGNSS files according to your needs and then click “Download selected file” to download the files from the server. Figure 16: Connect and Download – AGNSS Online Step 4: Click the “Select file”...

  • Page 24: Assistant Gnss Offline

    GNSS Module Series Figure 17: Download Selected File – AGNSS Online Step 5: When the download is successful, the progress bar will indicate 100 % and there will be a green rectangle on the screen, as shown in the figure below. Figure 18: Successfully Downloaded to the Module –...
  • Page 25 GNSS Module Series Figure 19: AGNSS Setting via QGNSS - Assistant GNSS Offline Step 2: In the “Assistant GNSS Offline” interface, fill in the FTP server information, and set “Time”, “Position” and “Restart type” according to your needs. Figure 20: Assistant GNSS Offline Setting Step 3: After clicking the “Connect”...
  • Page 26 GNSS Module Series Figure 21: Connect and Download – AGNSS Offline Step 4: Click the “Select file” button to select the files to be downloaded to the module, and then click the “Download to module” button to start downloading, as shown in the figure below. Figure 22: Download Selected File –...
  • Page 27 GNSS Module Series Figure 23: Successfully Downloaded to the Module – AGNSS Offline L76_Series_EVB_User_Guide 26 / 31...

  • Page 28: Using Qgpsflashtool To Upgrade Firmware

    GNSS Module Series Using QGPSFlashTool to Upgrade Firmware Quectel L76 series module supports firmware upgrade via UART interface by using the QGPSFlashTool. Download the QGPSFlashTool from our website Download Zone. Before you start the firmware upgrade process: First: Connect the EVB to a PC using a Micro-USB cable.
  • Page 29 GNSS Module Series Figure 25: Firmware Upgrade – Step 2 Step 3: Double click the “ROM file” field to select the ROM file, e.g. “L76LBNR03A01SCV03_GLN.bin”, then double click “DA File” field select file, e.g. “MTK_AllInOne_DA_MT3333_MP.bin”, as shown in the figure below. Figure 26: Firmware Upgrade –...
  • Page 30 GNSS Module Series Figure 27: Firmware Upgrade – Step 4 Step 5: When the firmware upgrade is successful, the progress bar will indicate 100 % and there will be a green rectangle on the screen, as shown in the figure below. Figure 28: Successful Firmware Upgrade ⚫...

  • Page 31: Appendix References

    GNSS Module Series Appendix References Table 5: Related Documents Document Name Quectel_QCOM_User_Guide Quectel_QGNSS_User_Guide Quectel_QGPSFlashTool_User_Guide Quectel_L76-L(L)&L76-LB(L)_EVB_User_Guide Table 6: Terms and Abbreviations Abbreviation Description 2 Dimension 3 Dimension BeiDou BeiDou Navigation Satellite System COM Port Communication Port Circular Error Probable Carrier-to-Noise Ratio Digital Input Digital Output Ellipsoidal Height...
  • Page 32 GNSS Module Series GNSS Global Navigation Satellite System Global Positioning System Input/Output Light Emitting Diode Low-Noise Amplifier Micro-USB Micro Universal Serial Bus Mean Sea Level NMEA NMEA (National Marine Electronics Association) 0183 Interface Standard Personal Computer Power Input PMTK MTK Proprietary Protocol Power Output Pulse Per Second Pseudorandom Noise...

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