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UniTraQ International Corp.

 

                                                                                       

RoHS compliance

2007, Version 1.1                                                                                   

 

 

 

 

 

 

1. FEATURES 

 

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44 channels to acquire and track 

satellites simultaneously 

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 Industry-leading 

TTFF 

speed 

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Signal detection better than -158 dBm 

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SBAS (WAAS/EGNOS) capable 

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Cold start < 45sec 

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Hot start < 1sec 

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 Accuracy 

5m 

CEP 

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 USB 

Interface 

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 Easy-plug-in 

Notebook 

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    49.8 mm x 43.7 mm x 17.6 mm 

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RoHS 

compliance 

 

 

 

 

GT-3731R 

Fast Acquisition Enhanced Sensitivity   
44 Channels USB Interface GPS Receiver 
 

 
The 

GT-3731R

 is a compact all-in-one GPS receiver that 

continuously tracks all satellites in view and provides 
accurate satellite positioning data.   
 
Its 44 parallel channels and 20000+ correlators provide fast 
satellite signal acquisition and short start-up time. Acquisition 
sensitivity of -155dBm and tracking sensitivity of -158 dBm 
offer good performance even under difficult environments. 

 

The 

GT-3731R

 is optimized for applications requiring good 

performance and low cost; it is suitable for a wide range of 
handhelds, asset tracking, Notebook, PDA-centric personal 
navigation system, and vehicle navigation products.

 

 
 
 
 
 
 
 

 
 
 
 

 

 

 

 

 

 

 

 

 

 

1

Eastern Star 7 series GT-3731R 

                                 

GPS Receiver 

Summary of Contents for GT-3731R

Page 1: ...e 2007 Version 1 1 Technical Manual USB GPS Receiver Series Model GT 3731R UniTraQ International Corp All right reserved 2006 9F 2 No 158 Sec 2 Gongdao 5th Rd Hsinchu City 30070 Taiwan R O C TEL 886 3...

Page 2: ...Customized package 5 9 Approved NMEA message 6 9 1 GGA global positioning system fix data 6 9 2 GLL latitude and longitude with time of position fix and status 7 9 3 GSA GPS DOP and active satellites...

Page 3: ...The GT 3731R is a compact all in one GPS receiver that continuously tracks all satellites in view and provides accurate satellite positioning data Its 44 parallel channels and 20000 correlators provid...

Page 4: ...vity 137dBm Receiver frequency 1575 42MHz Code C A code Accuracy 1 Position 2 Velocity 5m CEP 0 1m sec Startup Time hot start warm start cold start 1 sec 35 sec 45 sec Signal Reacquisition 1s Update R...

Page 5: ...fix In fix mode the LED will light for 1second and turn off for 1second In another mode the pin will light for 2 seconds and turn off for 2 seconds 4 COMMUNICATION SEPECIFICATIONS Item Description Int...

Page 6: ...tar 7 series GT 3731R GPS Receiver 5 ENVIRONMENT SPECIFICATION Parameter Specification Operating 20 60 Temperature Storage 40 80 Humidity 5 95 6 PIN ASSIGNMENT PIN Signal name Description Notes 1 VCC...

Page 7: ...ersion 1 1 5 Eastern Star 7 series GT 3731R GPS Receiver 7 MECHANIC DIMENSION Parameter Specification Physical dimension 49 8mm X 43 7mm X 17 6mm Weight 14g 8 CUSTOMIZED PACKAGE z Color box z CD inclu...

Page 8: ...2100 5204 Longitude in dddmm mmmm format Leading zeros transmitted 5 E W Indicator E Longitude hemisphere indicator E East W West 6 GPS quality indicator 1 GPS quality indicator 0 position fix unavail...

Page 9: ...mple Description 1 Latitude 4250 5589 Latitude in ddmm mmmm format Leading zeros transmitted 2 N S Indicator S Latitude hemisphere indicator N North S South 3 Longitude 14718 5084 Longitude in dddmm m...

Page 10: ...3 3 3 3 3 3 4 5 6 7 Example GPGSA A 3 01 20 19 13 40 4 24 4 32 2 0A CR LF Field Name Example Description 1 Mode A Mode M Manual forced to operate in 2D or 3D mode A Automatic allowed to automatically...

Page 11: ...Example GPGSV 3 1 09 28 81 225 41 24 66 323 44 20 48 066 43 17 45 336 41 78 CR LF GPGSV 3 2 09 07 36 321 45 04 36 257 39 11 20 050 41 08 18 208 43 77 CR LF Field Name Example Description 1 Number of m...

Page 12: ...Data Valid 3 Latitude 4250 5589 Latitude in dddmm mmmm format Leading zeros transmitted 4 N S indicator S Latitude hemisphere indicator N North S South 5 Longitude 14718 5084 Longitude in dddmm mmmm...

Page 13: ...ters per hour 0000 0 1800 0 5 Mode A Mode indicator N not valid A Autonomous mode D Differential mode E Estimated dead reckoning mode M Manual input mode S Simulator mode 6 Checksum 5F 9 7 ZDA TIME AN...

Page 14: ...ion at any time without notice These materials are provides as is without warranty of any kind either expressed or implied relating to sale and or use of UniTraQ products including liability or warran...

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