Related Manuals for Quectel L76C
Summary of Contents for Quectel L76C
- Page 1 L76C EVB User Guide GNSS Module Series Rev. L76C_EVB_User_Guide_V1.0 Date: 2018-08-29 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.
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Page 3: About The Document
GNSS Module Series L76C EVB User Guide About the document History Revision Date Author Description Brooke WANG/ 2018-08-29 Initial Gobber HU L76C_EVB_User_Guide 2 / 26... -
Page 4: Table Of Contents
GNSS Module Series L76C EVB User Guide Contents About the document ........................... 2 Contents ............................... 3 Table Index ..............................4 Figure Index ..............................5 Introduction ............................6 1.1. Safety Information ........................7 General Overview ..........................8 2.1. Top and Bottom Views ........................ 8 2.2. - Page 5 GNSS Module Series L76C EVB User Guide Table Index TABLE 1: INTERFACES OF L76C EVB ......................9 TABLE 2: KEY FEATURES OF L76C EVB......................10 TABLE 3: LIST OF ACCESSORIES ........................11 TABLE 4: L76C SWITCHES AND BUTTONS ....................15 TABLE 5: OPERATION STATUS INDICATION LEDS ..................
- Page 6 FIGURE 7: L76C EVB SWITCHES AND BUTTONS ..................14 FIGURE 8: OPERATION STATUS INDICATION LEDS ..................15 FIGURE 9: L76C EVB TEST POINTS - J106 ....................16 FIGURE 10: L76C EVB AND ACCESSORIES ASSEMBLY ................17 FIGURE 11: USB PORTS ..........................18 FIGURE 12: COM PORT SETTING INTERFACE OF QCOM ................
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Page 7: Introduction
GNSS Module Series L76C EVB User Guide Introduction This document defines and specifies the usage of L76C EVB (Evaluation Board) which is an assistant tool for engineers to develop and test Quectel L76C module. L76C_EVB_User_Guide 6 / 26... -
Page 8: Safety Information
L76C module. Manufacturers of the cellular 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 9: General Overview
GNSS Module Series L76C EVB User Guide General Overview 2.1. Top and Bottom Views The following illustrate the top and bottom views of L76C EVB. Figure 1 : Top View of L76C EVB L76C_EVB_User_Guide 8 / 26... - Page 10 GNSS Module Series L76C EVB User Guide Figure 2 : Bottom View of L76C EVB Table 1: Interfaces of L76C EVB Reference Description Number J303 SD card interface USB ←→ SD (serial port alternation switch) S301 S102 RESET button S103...
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Page 11: Key Features
GNSS Module Series L76C EVB User Guide 2.2. Key Features The following table describes the detailed features of L76C EVB. Table 2: Key Features of L76C EVB Features Implementation Power Supply DC power supply (J201): 4.5V~5.5V, typically: 5.0V SD Card Interface... - Page 12 GNSS Module Series L76C EVB User Guide Table 3: List of Accessories Items Description Quantity L76C EVB Cable USB cable Antenna Active GNSS antenna USB Flash Drive GNSS_EVB_Micro-USB_Driver_CP210x A sheet of paper giving instructions for EVB Instruction Sheet connection, details of EVB accessories, etc.
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Page 13: Interface Applications
GNSS Module Series L76C EVB User Guide Interface Applications 3.1. Micro-USB Interface The main power is supplied via a Micro-USB interface. Both Micro-USB and SD card interfaces can be used for data communication, and they can be switched to each other by the alternation switch (S301). If SD card interface is used for data communication (NMEA sentence output), then both SD card and Micro-USB cables are necessary for operating the EVB. -
Page 14: Sd Card Interface
Figure 5: SD Card Interface 3.3. Antenna Interface The L76C module can be connected to a dedicated passive or active GNSS antenna and it has a built-in LNA to improve sensitivity. The antenna interface is used for connection with an external antenna. -
Page 15: Switches And Buttons
GNSS Module Series L76C EVB User Guide Figure 6: L76C EVB Antenna Interface 3.4. Switches and Buttons The following illustrates the switches and buttons of the EVB. S301 S201 S102 S103 Figure 7: L76C EVB Switches and Buttons L76C_EVB_User_Guide 14 / 26... -
Page 16: Operation Status Indication Leds
S103 Reserved S201 POWER Control power supply via Micro-USB interface. USB ←→ SD L76C EVB supports data communication via both S301 (serial port Micro-USB and SD card interfaces which are alternation switch) controlled and switched by the S301 switch. 3.5. Operation Status Indication LEDs... -
Page 17: Test Points
GNSS Module Series L76C EVB User Guide 3.6. Test Points The following figure illustrates the test points of the EVB. Figure 9: L76C EVB Test Points - J106 Table 6: Pin Description of J106 Pin No. Signal Description 1/10 Ground... -
Page 18: Evb And Accessories Assembly
GNSS Module Series L76C EVB User Guide EVB and Accessories Assembly The following figure shows the assembly of L76C EVB and its accessories. Figure 10: L76C EVB and Accessories Assembly L76C_EVB_User_Guide 17 / 26... -
Page 19: Evb Operation Procedures
PC Device Manager, shown as below. Figure 11: USB Ports Step 3: Install and then use the QCOM tool provided by Quectel to realize the communication between the L76C module and the PC. The following figure shows the COM Port Setting interface of QCOM: select the correct “COM Port”... -
Page 20: Firmware Upgrade
L76C EVB User Guide 5.2. Firmware Upgrade Quectel L76C module upgrades its firmware via USB interface by default. Please follow the procedures below to upgrade the firmware. Step 1: Install and open the firmware upgrade tool (Firebird Update FW Tool) on PC. -
Page 21: Usage Of Ustar
GNSS Module Series L76C EVB User Guide Usage of uSTAR 6.1. uSTAR Interface 6.1.1. COM Port and Baud Rate Setting The uSTAR tool can help users to view the status of GNSS receiver conveniently. After EVB accessories are assembled, turn on the module and start up the uSTAR. After the tool is... -
Page 22: Explanations Of Ustar Interface
GNSS Module Series L76C EVB User Guide After that, select a correct COM port and baud rate (L76C module supports 9600bps by default), then click the button “OK”. Figure 15: COM Port and Baud Rate Selection 6.1.2. Explanations of uSTAR Interface From the uSTAR interface, users can view CNR message, time, position, speed, precision, and so on. -
Page 23: Command Sending
GNSS Module Series L76C EVB User Guide ⚫ The CNR of PRN 9 is 19dB/Hz. ⚫ White column means the navigation data of this satellite is not in use. ⚫ Longitude degree ⚫ Latitude degree ⚫ Altitude based on WGS84 datum ⚫... -
Page 24: Ttff Testing
GNSS Module Series L76C EVB User Guide Figure 16: Command Sending via uSTAR 6.3. TTFF Testing uSTAR tool allows customers to measure the TTFF (Time To First Fix) under different testing conditions. The TTFF can be tested under cold start, warm start or hot start conditions. Click the “Start” button to start the test and it can be stopped by clicking the “Cancel”... - Page 25 GNSS Module Series L76C EVB User Guide Figure 17: Static TTFF Testing via uSTAR Step 2: For cold start TTFF testing Please click the dropdown list after “Reset Mode” field to choose “Cold Start”, and then click “Start”, as shown below:...
- Page 26 GNSS Module Series L76C EVB User Guide For hot start TTFF testing Please click the dropdown list after “Reset Mode” field to choose “Hot Start”, and then click “Start”, as shown below: Figure 19: Hot Start TTFF Testing Configuration Options For warm start TTFF testing Please click the dropdown list after “Reset Mode”...
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Page 27: Appendix A Reference
GNSS Module Series L76C EVB User Guide Appendix A Reference Table 8: Terms and Abbreviations Abbreviation Description Carrier-to-Noise Ratio Digital Input Digital Output Evaluation Board GNSS Global Navigation Satellite System Global Positioning System Bidirectional Light Emitting Diode Low Noise Amplifier...
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