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This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, 
permission of GlobalTop Tech Inc

Copyright © 2014 GlobalTop Technology Inc. All Rights Reserved.

No.16 Nan-ke 9

th

 Rd, Science

Tel

: +886-6-5051268 / Fax: +886

  

GlobalTop Technology Inc.

GPS Module
Application Notes
(MT3337 series) 

Revision: A00 

  

  

  

  

  

  

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Reference layout, design tips, guides, and cautions for GlobalTop GPS modules.

 

This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, 
permission of GlobalTop Tech Inc. Specifications subject to change without prior notice. 

GlobalTop Technology Inc. All Rights Reserved.

Rd, Science-Based Industrial Park, Tainan, 741, Taiwan, R.O.C. 

5051268 / Fax: +886-6-5053381 / Email: 

[email protected]

  / Web: 

GlobalTop Technology Inc. 

GPS Module 
Application Notes 
(MT3337 series) 

 

Reference layout, design tips, guides, and cautions for GlobalTop GPS modules.

 

Ver. A00 

This document is the exclusive property of GlobalTop Tech Inc. and should not be distributed, reproduced, into any other format without prior 

 

GlobalTop Technology Inc. All Rights Reserved. 

 

/ Web: 

www.gtop-tech.com

  

Reference layout, design tips, guides, and cautions for GlobalTop GPS modules. 

Summary of Contents for MT3337 Series

Page 1: ...be distributed reproduced permission of GlobalTop Tech Inc Specifications subject to change without prior notice GlobalTop Technology Inc All Rights Reserved Rd Science Based Industrial Park Tainan 74...

Page 2: ...Top Tech Inc and should not be distributed reproduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Righ...

Page 3: ...Caution for Reflow Soldering Process his document is the exclusive property of GlobalTop Tech Inc and should not be distributed reproduced into any other prior permission of GlobalTop Tech Inc Specifi...

Page 4: ...Technology Inc All Rights Reserved Module Application Notes MT3337 series read carefully before you start If you use GPS receiver inside buildings tunnels or besides any huge objects the GPS off or di...

Page 5: ...ns subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series Technical Support If you have any technical problems or cannot find t...

Page 6: ...s the exclusive property of GlobalTop Tech Inc and should not be distributed reproduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014...

Page 7: ...ifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series 2 General Rules for Design in In order to obtain good GPS per...

Page 8: ...applications for applying VBACKUP to GPS module when the main power is not supplied to keep RTC running and navigation data For a short term VCC off with this backup power the GPS module is capable of...

Page 9: ...n Notes MT3337 series Serial Interface PA6C R interface that carries the baud rate ranging from 4800 bps to 115200 bps the RX and TX of the GPS module could limit the interference host MCU or high spe...

Page 10: ...small form factor with low cost There are two types Passive antenna is solely antenna by itself without signal amplifier such as LNA Examples are p If you have your own patch antenna it is required t...

Page 11: ...es MT3337 series architecture with GPS module needs a DC power to have it work properly is to feed a DC into the RF trace and the External Antenna extracts the RF trace to transport both RF signal and...

Page 12: ...pecifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series Module Antenna_IN VANT RF External Antenna Antenna Power F...

Page 13: ...cation Notes MT3337 series r1 PA6C R 1PPS signal is an output pulse signal used for timing application Its electrical characteristic 100ms pulse width duration Firmware customization for customized pu...

Page 14: ...into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series Fo...

Page 15: ...Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series For 3D_Fix indication user may connect a LED with a 330o...

Page 16: ...ecifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series 2 2 Layout Guideline guideline for the right GPS module whe...

Page 17: ...be distributed reproduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Applicati...

Page 18: ...ect to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series Keep far away from high profile or metal canned components GPS module far aw...

Page 19: ...oduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 ser...

Page 20: ...st to follow these typical rules segmentation of ground between digital and analogue system high current and low current system such as GPS and GPRS One way to segment the ground is to place digital a...

Page 21: ...ted reproduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT...

Page 22: ...ooting to check for the working status of GPS module The first thing to check for is the NMEA sentence output through TX using various application tools use windows default tool Hyperterminal in WinXP...

Page 23: ...eproduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337...

Page 24: ...ecifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series Super Capacitor Design lifetime similar to that of aluminum...

Page 25: ...fications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series Antenna Matching to simulate 50 impedance for RF PCB layout PC...

Page 26: ...ct to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series UART to RS232 Interface RS232 or USB interface is required to connect the PC...

Page 27: ...y Inc All Rights Reserved Module Application Notes MT3337 series UART to USB Interface the GlobalTop module you have purchased do not come with a USB interface it is possible to an external USB IC To...

Page 28: ...Notes MT3337 series How to efficiently transfer 1PPS through extended distances when transferring 1PPS signal through a long cable increase in noise and increase in signal delay As the 1PPS signal th...

Page 29: ...ermission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series When using coaxial cable...

Page 30: ...ce 2014 GlobalTop Technology Inc All Rights Reserved Module Application Notes MT3337 series The delay time cause by the cable in respect to the communication cable length The simplest method to calcul...

Page 31: ...to use a r example the signal travels in 1 meter of coaxial cable can have its delay time ured by the oscilloscope as 5ns and consequently the will be 2 108 m s and inductance for the coaxial cable i...

Page 32: ...and should not be distributed reproduced into any other prior permission of GlobalTop Tech Inc Specifications subject to change without prior notice 2014 GlobalTop Technology Inc All Rights Reserved M...

Page 33: ...ng temperature profile Double check to see if the surrounding components around the GPS module are displaying symptoms of cold weld ing false welding Special attentions are needed for PCBA soldering t...

Page 34: ...ng the PCBA under high temperature 1 When separating the PCBA panel into Cut process special attentions are needed to ensure there are sufficient gap between Cut process is not available and the piece...

Page 35: ...ion line and storage area Temperature of 23 C 60 5 RH humidity is recommended please refer to IPQC for related documentation and examples When performing solder paste printing please notice if the amo...

Page 36: ...ering pads on the surface of the PCB board The solder paste must be defrosted to room temperature before use so it can return to its rking temperature The time required for this procedure is unique an...

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