User`s manual

USB Dongle Series Model:UD-731

UniTraQ International Corp. RoHS compliance.

2010,07, Version 1.3

 GPS not fix problem

If you see “GPS not fix” message on the screen after you enable the UD-731 GPS receiver,

please consider the possible problems below:

 Wait few minutes. GPS position may cost several minutes.

 Make sure the UD-731 GPS receiver is put on a proper place. Some sun-control

film for car may cutoff the satellite signal. You may replace it and try again.

 USB driver confliction problem

If you notice mouse cursor is jumping when you plug receiver into USB port, remove the

UD-731 from USB port and plug-in again.

10. APPROVED NMEA MESSAGE

The serial interface protocol is based on the National Marine Electronics Association’s NMEA

0183 ASCII interface specification. This standard is fully define in “NMEA 0183, Version 3.01”

The standard may be obtained from NMEA, www.nmea.org

10.1 GGA – GLOBAL POSITIONING SYSTEM FIX DATA

Time, position and fix related data for a GPS receiver.

Structure:

$GPGGA,hhmmss.sss,ddmm.mmmm,a,dddmm.mmmm,a,x,xx,x.x,x.x,M,x.x,M,x.x,xxxx*hh<CR><LF>

1 2 3 4 5 6 7 8 9 10 11 12 13

Example:

$GPGGA,060932.448,2447.0959,N,12100.5204,E,1,08,1.1,108.7,M,,,,0000*0E<CR><LF>

Field Name Example Description

1 UTC Time 060932.448 UTC of position in hhmmss.sss format, (000000.00 ~

235959.99)

2 Latitude 2447.0959 Latitude in ddmm.mmmm format ddmm.mmmm

Leading zeros transmitted

3 N/S Indicator N Latitude hemisphere indicator, ‘N’ = North, ‘S’ = South