Quectel GNSS Series User Manual
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Quectel GNSS Series User Manual

Quectel GNSS Series User Manual

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L26-LB
EVB User Guide
GNSS Module Series
Rev. L26-LB_EVB_User_Guide_V1.0
Date: 2020-01-20
Status: Released
www.quectel.com

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Summary of Contents for Quectel GNSS Series

  • Page 1 L26-LB EVB User Guide GNSS Module Series Rev. L26-LB_EVB_User_Guide_V1.0 Date: 2020-01-20 Status: Released www.quectel.com...
  • Page 2 QUECTEL OFFERS THE INFORMATION AS A SERVICE TO ITS CUSTOMERS. THE INFORMATION PROVIDED IS BASED UPON CUSTOMERS’ REQUIREMENTS. QUECTEL MAKES EVERY EFFORT TO ENSURE THE QUALITY OF THE INFORMATION IT MAKES AVAILABLE. QUECTEL DOES NOT MAKE ANY WARRANTY AS TO THE INFORMATION CONTAINED HEREIN, AND DOES NOT ACCEPT ANY LIABILITY FOR ANY INJURY, LOSS OR DAMAGE OF ANY KIND INCURRED BY USE OF OR RELIANCE UPON THE INFORMATION.

  • Page 3: About The Document

    GNSS Module Series L26-LB EVB User Guide About the Document Revision History Revision Date Author Description 2020-01-20 Ronnie HU Initial L26-LB_EVB_User_Guide 2 / 28...

  • Page 4: Table Of Contents

    GNSS Module Series L26-LB EVB User Guide Contents About the Document ........................... 2 Contents ............................... 3 Table Index ..............................4 Figure Index ..............................5 Introduction ............................6 1.1. Safety Information ........................6 General Overview ..........................7 2.1. Top View ............................7 2.2.
  • Page 5 GNSS Module Series L26-LB EVB User Guide Table Index Table 1: Interfaces of L26-LB EVB ....................... 7 Table 2: List of Accessories .......................... 9 Table 3: Pin Definition of UART Interface ....................11 Table 4: L26-LB EVB Switches and Buttons ....................13 Table 5: Operation Status Indication LEDs ....................
  • Page 6 GNSS Module Series L26-LB EVB User Guide Figure Index Figure 1: Top View of L26-LB EVB ....................... 7 Figure 2: L26-LB EVB Kit Accessories ......................8 Figure 3: L26-LB EVB and Accessories Assembly ..................9 Figure 4: Micro USB Interface ........................10 Figure 5: UART Interface ..........................11 Figure 6: L26-LB EVB Antenna Interface ....................

  • Page 7: Introduction

    Quectel L26-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. If not so, Quectel assumes no liability for customers’ failure to comply with these precautions.

  • Page 8: General Overview

    GNSS Module Series L26-LB EVB User Guide General Overview 2.1. Top View The following figure illustrates the top view of L26-LB EVB. Figure 1: Top View of L26-LB EVB Table 1: Interfaces of L26-LB EVB Reference Description Number J301 UART Connector USB ←→...

  • Page 9: Evb Kit Accessories

    GNSS Module Series L26-LB EVB User Guide S103 FORCE_ON button S201 POWER switch J201 Micro USB connector D105, D106 Indication LEDs J101 Antenna connector U103 L26-LB module S101 STANDBY switch J106 Test points 2.2. EVB Kit Accessories GNSS Antenna Bolts and Coupling Nuts USB Flash Drive...

  • Page 10: Evb And Accessories Assembly

    GNSS Module Series L26-LB EVB User Guide Table 2: List of Accessories Items Description Quantity Evaluation board of L26-LB Cable USB cable Antenna Active GNSS antenna USB flash drive (including L26-LB related USB Flash Drive documents, tools, drivers, etc.) A sheet of paper giving instructions for EVB Instruction Sheet connection, details of EVB accessories, etc.

  • Page 11: Evb Interfaces

    GNSS Module Series L26-LB EVB User Guide EVB Interfaces 3.1. Micro USB Interface The main power is supplied via the micro USB interface. Both micro USB and UART interfaces can be used for data communication, and the two interfaces can be switched by the alternation switch S301.

  • Page 12: Uart Interface

    GNSS Module Series L26-LB EVB User Guide 3.2. UART Interface Figure 5: UART Interface Table 3: Pin Definition of UART Interface Pin No. Signal Description RXD1 Receive data TXD1 Transmit data 3.3. Antenna Interface L26-LB module receives satellite signals via antenna interface. Both active antenna and passive antenna are supported.

  • Page 13: Switches And Buttons

    GNSS Module Series L26-LB EVB User Guide Figure 6: L26-LB EVB Antenna Interface 3.4. Switches and Buttons The following figure illustrates the switches and buttons of the EVB. L26-LB_EVB_User_Guide 12 / 28...
  • Page 14 GNSS Module Series L26-LB EVB User Guide S101 S301 S201 S103 S102 Figure 7: L26-LB EVB Switches and Buttons Table 4: L26-LB EVB Switches and Buttons Part No. Name Description Move the switch to ENTER state: the module enters standby S101 STANDBY mode.

  • Page 15: Operation Status Indication Leds

    GNSS Module Series L26-LB EVB User Guide 3.5. Operation Status Indication LEDs Figure 8: Operation Status Indication LEDs Table 5: Operation Status Indication LEDs Part No. Name Description Flash: successful fix. The frequency is 1 Hz. D106 1PPS Extinct: no fix. Flash: Data output from TXD1.
  • Page 16 GNSS Module Series L26-LB EVB User Guide Figure 9: L26-LB EVB Test Points (J106) Table 6: Pin Description of Test Points (J106) Pin No. Signal Description Ground STANDBY Enter or exit standby mode RXD1 Receive data 1PPS 1 pulse per second TXD1 Transmit data Not connected...

  • Page 17: Evb Operation Procedures

    PC Device Manager, as shown below. Figure 10: USB Ports Step 3: Install and then use the QCOM tool provided by Quectel to realize the communication between the module and the PC. The following figure shows the COM Port Setting interface of QCOM: select the correct “COM Port”...

  • Page 18: Firmware Upgrade

    GNSS Module Series L26-LB EVB User Guide 4.2. Firmware Upgrade Quectel L26-LB module upgrades the firmware via micro USB interface by default. Please follow the procedures below to upgrade firmware. Step 1: Install and open the firmware upgrade tool FlashTool on PC.

  • Page 19: Usage Of Powergps

    GNSS Module Series L26-LB EVB User Guide Usage of PowerGPS PowerGPS tool is used to check the status of GNSS receivers. This chapter illustrates the usage of the tool. 5.1. COM and Baud Rate Setting Step 1: After EVB accessories are assembled, turn on the EVB and start PowerGPS (PowerGPS Trial 2.3.6 as an example herein).

  • Page 20: Interface Explanations

    GNSS Module Series L26-LB EVB User Guide Figure 14: PowerGPS Interface (Connected) 5.1.1. Interface Explanations On the PowerGPS interface, GNSS information such as CNR message, time, position, speed and precision can be viewed. Explanations are listed in the table below. Table 7: Explanations of PowerGPS Interface Icon Explanation...

  • Page 21: Pmtk Command Sending

    GNSS Module Series L26-LB EVB User Guide  The CNR of PRN 28 is 49 dB/Hz.  G means it is a GPS satellite, B means it is a BeiDou satellite, and S means it is a SBAS.  Light blue column means the navigation data of this satellite is in use.

  • Page 22: Automatic Ttff Testing

    GNSS Module Series L26-LB EVB User Guide Figure 15: PMTK Command Sending via PowerGPS 5.3. Automatic TTFF Testing PowerGPS tool allows users to measure the TTFF (Time to First Fix) under different testing conditions. The TTFF can be tested under full cold start, cold start, warm start or hot start conditions, and the number of tests can be selected from 1, 10, 20, 100, 1000 and 10000.
  • Page 23 GNSS Module Series L26-LB EVB User Guide Restart Type The Number of Tests Figure 16: Static TTFF Testing via PowerGPS L26-LB_EVB_User_Guide 22 / 28...
  • Page 24 GNSS Module Series L26-LB EVB User Guide Step 2: Click “Set Reference Point” and the Options window will be shown as below, then choose “Reference Location”. Figure 17: Choose Reference Location After that, the interface will be shown as below. Click “Use Mean Position” and then “OK”. Figure 18: Click Use Mean Position L26-LB_EVB_User_Guide 23 / 28...
  • Page 25 GNSS Module Series L26-LB EVB User Guide Step 3: Return to the interface shown as below and click “Config” to get to TTFF Configuration interface. Then set “TTFF Time- out (sec)”, and finally click “OK”. Figure 19: Click Config L26-LB_EVB_User_Guide 24 / 28...
  • Page 26 GNSS Module Series L26-LB EVB User Guide Figure 20: Set TTFF Time-out (Sec) Generally, if hot start is selected, “TTFF Time-out (sec)” is recommended to be set as 10 s. If warm start is selected, it can be set as 50 s. If cold start is selected, it can be set as 100 s. “TTFF Time–out (sec)” can help judge TTFF and save time.
  • Page 27 GNSS Module Series L26-LB EVB User Guide Figure 21: Click Run/Stop Button Step 5: After finishing the testing, users can see the testing result charts. The test result will be stored in the directory where the tool is installed, for convenient view of the log at any time. L26-LB_EVB_User_Guide 26 / 28...

  • Page 28: Appendix A References

    GNSS Module Series L26-LB EVB User Guide Appendix A References Table 8: Related Documents Document Name Remark Quectel_L26-LB_Hardware_Design L26-LB Hardware Design Quectel_L26-LB&L76-LB_GNSS_Protocol_ L26-LB/L76-LB GNSS Protocol Specification Specification Quectel_L26-LB_Reference Design L26-LB Reference Design Quectel_QCOM_User_Guide QCOM User Guide Table 9: Terms and Abbreviations Abbreviation Description Carrier-to-Noise Ratio...
  • Page 29 GNSS Module Series L26-LB EVB User Guide Power output Pulse Per Second Pseudorandom Noise Standard Positioning Service Satellite Vehicle UART Universal Asynchronous Receiver & Transmitter Universal Time Coordinated VDOP Vertical Dilution of Precision WGS84 World Geodetic System 1984 L26-LB_EVB_User_Guide 28 / 28...

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