Quectel L76 User manual

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

GNSS Module Series
L76_Series_EVB_User_Guide 1 / 31
Our aim is to provide customers with timely and comprehensive service. For any assistance,
contact our company headquarters:
Quectel Wireless Solutions Co., Ltd.
Building 5, Shanghai Business Park Phase III (Area B), No.1016 Tianlin Road, Minhang District, Shanghai
200233, China
Tel: [phone]
Email: [e-mail]
Or our local office. For more information, visit:
http://www.quectel.com/support/sales.htm.
For technical support, or to report documentation errors, visit:
http://www.quectel.com/support/technical.htm
Or send an email to [e-mail].
General Notes
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 the use of or reliance upon the information.
All information supplied herein is subject to change without prior notice.
Disclaimer
While Quectel has made efforts to ensure that the functions and features under development are free from
errors, it is possible that these functions and features could contain errors, inaccuracies and omissions.
Unless otherwise provided by valid agreement, Quectel makes no warranties of any kind, implied or
express, with respect to the use of features and functions under development. 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.
Duty of Confidentiality
The Receiving Party shall keep confidential all documentation and information provided by Quectel, except
when the specific permission has been granted by Quectel. The Receiving Party shall not access or use
Quectel’s documentation and information for any purpose except as expressly provided herein.
Furthermore, the Receiving Party shall not disclose any of the Quectel's documentation and information
to any third party without prior written consent by Quectel. Quectel reserves the right to take legal action
for any noncompliance with the above requirements, unauthorized use, or other illegal or malicious use of
the documentation and information.

GNSS Module Series
L76_Series_EVB_User_Guide 2 / 31
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.
Copyright © Quectel Wireless Solutions Co., Ltd. 2021. All rights reserved.

GNSS Module Series
L76_Series_EVB_User_Guide 3 / 31
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. Otherwise, Quectel assumes no liability for customers’ failure to comply
with these precautions.
Ensure that the product may be used in the country and the required environment,
as well as that it conforms to the local safety and environmental regulations.
Keep away from explosive and flammable materials. The use of electronic products
in extreme power supply conditions and locations with potentially explosive
atmospheres may cause fire and explosion accidents.
The product must be powered by a stable voltage source, while the wiring must
conform to security precautions and fire prevention regulations.
Proper ESD handling procedures must be followed throughout the mounting,
handling and operation of any devices and equipment that incorporate the module
to avoid ESD damages.

GNSS Module Series
L76_Series_EVB_User_Guide 4 / 31
About the Document
Revision History
Document Information
Title
L76 Series EVB User Guide
Subtitle
GNSS Module Series
Document Type
EVB User Guide
Document Status
Released
Version
Date
Description
1.0
2013-02-25
Initial
1.1
2013-03-26
Optimized the contents of Chapter 3.
2.0
2016-05-03
1. Changed the document name from Quectel_L76_EVB_User_Guide to
Quectel_L76_Series_EVB_User_Guide.
2. Incorporated the related information of L76-L.
2.1
2021-08-05
1. Added the applicable module L76-LB.
2. Updated the overall structure of the document, including but not limited
to the adding of Chapters 4, 5 and 6.

GNSS Module Series
L76_Series_EVB_User_Guide 5 / 31
Contents
Safety Information...................................................................................................................................... 3
About the Document.................................................................................................................................. 4
Contents...................................................................................................................................................... 5
Table Index.................................................................................................................................................. 6
Figure Index................................................................................................................................................ 7
1Introduction......................................................................................................................................... 8
2General Overview................................................................................................................................ 9
2.1. EVB Kit Accessories .................................................................................................................. 9
2.2. Connecting Cables and Antenna to EVB................................................................................. 10
3Board User Interfaces....................................................................................................................... 11
3.1. EVB Top View............................................................................................................................11
3.2. Board User Interfaces ...............................................................................................................11
4Using QCOM Tool to Communicate................................................................................................ 14
4.1. Communication via the Micro-USB Interface........................................................................... 14
5Using QGNSS Tool to Test............................................................................................................... 16
5.1. COM Port and Baud Rate Setting............................................................................................ 16
5.1.1. Interface Explanation .................................................................................................... 17
5.2. TTFF Testing ............................................................................................................................ 19
5.3. AGNSS Setting ........................................................................................................................ 21
5.3.1. Assistant GNSS Online................................................................................................. 21
5.3.2. Assistant GNSS Offline................................................................................................. 23
6Using QGPSFlashTool to Upgrade Firmware................................................................................ 27
7Appendix References....................................................................................................................... 30

GNSS Module Series
L76_Series_EVB_User_Guide 6 / 31
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 ..............................................................................................................30

GNSS Module Series
L76_Series_EVB_User_Guide 7 / 31
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 – Displayed on QCOM Tool Interface.............................. 15
Figure 7: QGNSS Setting...........................................................................................................................16
Figure 8: QGNSS Interface (Connected)................................................................................................... 17
Figure 9: Static TTFF Testing via QGNSS .................................................................................................19
Figure 10: TTFF Test Settings.................................................................................................................... 19
Figure 11: AGNSS Setting.......................................................................................................................... 20
Figure 12: Run or Stop Test .......................................................................................................................20
Figure 13: Test Results...............................................................................................................................21
Figure 14: AGNSS Setting via QGNSS – Assistant GNSS Online ............................................................21
Figure 15: Assistant GNSS Online Setting.................................................................................................22
Figure 16: Connect and Download – AGNSS Online ................................................................................22
Figure 17: Download Selected File – AGNSS Online................................................................................ 23
Figure 18: Successfully Downloaded to the Module – AGNSS Online......................................................23
Figure 19: AGNSS Setting via QGNSS - Assistant GNSS Offline............................................................. 24
Figure 20: Assistant GNSS Offline Setting.................................................................................................24
Figure 21: Connect and Download – AGNSS Offline ................................................................................ 25
Figure 22: Download Selected File – AGNSS Offline................................................................................ 25
Figure 23: Successfully Downloaded to the Module – AGNSS Offline...................................................... 26
Figure 24: Firmware Upgrade – Step 1......................................................................................................27
Figure 25: Firmware Upgrade – Step 2......................................................................................................28
Figure 26: Firmware Upgrade – Step 3......................................................................................................28
Figure 27: Firmware Upgrade – Step 4......................................................................................................29
Figure 28: Successful Firmware Upgrade ................................................................................................. 29

GNSS Module Series
L76_Series_EVB_User_Guide 8 / 31
1Introduction
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:
⚫Chapter 2 provides the general overview of EVB Kit accessories.
⚫Chapter 3 describes the EVB user interfaces.
⚫Chapter 4 describes how to communicate with a module by using the QCOM tool;
⚫Chapter 5 describes how to test the module by using the QGNSS tool;
⚫Chapter 6 describes how to upgrade firmware of the module by using the QGPSFlashTool;
⚫Chapter 7 is an appendix, which summarizes the relevant documents, terms and abbreviations
appearing herein.
In this document, Quectel L76 series includes L76, L76-L and L76-LB modules. For the EVB user guide of
L76-L (L) and L76-LB (L) modules, see document [4].
⚫
If you need EVB schematic and PCB layout design files for reference, request them from Quectel Technical
Supports ([e-mail]).
NOTE

GNSS Module Series
L76_Series_EVB_User_Guide 9 / 31
2General Overview
2.1. EVB Kit Accessories
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.
Bolts and coupling nuts
EVB
Micro-USB cable
Active GNSS antenna
Figure 1: EVB Kit Accessories