EVK-M8U - User Guide

UBX-15023994 - R05

Page 3 of 27

Contents

Document Information................................................................................................................................ 2

Contents .......................................................................................................................................................... 3

1 Product description .............................................................................................................................. 5

1.1 Overview........................................................................................................................................................5

1.2 Kit includes ...................................................................................................................................................5

1.3 Evaluation software....................................................................................................................................5

1.4 System requirements ................................................................................................................................5

2 Specifications ......................................................................................................................................... 6

2.1 Safety precautions .....................................................................................................................................6

3 Device description ................................................................................................................................. 7

3.1 Interface connection and measurement................................................................................................7

3.2 Active antenna.............................................................................................................................................7

3.3 Evaluation unit.............................................................................................................................................7

3.3.1 Antenna connector.............................................................................................................................7

3.3.2 USB ........................................................................................................................................................8

3.3.3 UART .....................................................................................................................................................8

3.3.4 RST button...........................................................................................................................................8

3.3.5 Safe boot button.................................................................................................................................8

3.3.6 Slide Switch .........................................................................................................................................8

3.3.7 Front test connector..........................................................................................................................9

3.3.8 LED.......................................................................................................................................................10

3.3.9 Backup battery..................................................................................................................................10

3.3.10 GNSS configuration .........................................................................................................................10

4 Setting up.............................................................................................................................................. 11

4.1 EVK-M8U installation...............................................................................................................................11

4.1.1 Mounting the GNSS antenna .........................................................................................................11

4.1.2 Mounting the EVK-M8U ..................................................................................................................11

4.1.3 Connecting the cables .....................................................................................................................12

4.2 Recommended configuration .................................................................................................................12

4.2.1 Serial port default configuration ...................................................................................................12

4.2.2 UDR receiver operation....................................................................................................................12

4.3 Accelerated initialization and calibration procedure .........................................................................14

5 Test drives ............................................................................................................................................ 15

6 Measuring tracking current ............................................................................................................ 16

7 Block diagram ...................................................................................................................................... 17

8 Board layout.......................................................................................................................................... 18

9 Schematic ............................................................................................................................................. 20

10 Battery replacement ......................................................................................................................... 21

11 Troubleshooting .................................................................................................................................. 22

12 Common evaluation pitfalls ............................................................................................................ 24