Installation guidelines for

the USB to serial adapter

 and USB cables


There are many USB to serial adapters available on the market. The instructions below are for the unit that we sell, see www.gpsoz.com.au/usb.htm . These instructions are also suitable for the USB cables that are available from www.gpsoz.com.au/cables.htm#USB%20Cables


If you have purchased another brand please contact your retailer or supplier for support. Unfortunately we cannot provide support for adapters that not purchased from us. (However some of the tips below may help!)

bulletTurn off GPS
bulletInsert the adapter/cable into the PC
bulletInsert enclosed CD into CD drive
bulletWindows should then discover a new USB device and prompt you to install the software. It should find it on the CD that you just inserted. Ignore the warning that the software has not be validated.
bulletWindows will create a virtual serial port on your PC. It will be called COMn. To determine what n is, use the device manager.


The following guidelines are for Windows XP but it’s similar on most other version of Windows

bulletClick "start" bottom left hand corner
bulletLocate the option "My Computer" and RIGHT click – this will pop up a short menu.



bulletChoose "Properties" from this menu
bulletSystem Properties dialogue box should then appear:



·        Click on the "Hardware TAB"


bulletChoose "Device Manager"

bulletClick on the "+" sign next to Ports (COM & LPT)

bulletLook for the line that says “Prolific on USB-to-Serial Comm Port (COM4)” or similar. Note the number after “COM”. In this example it is 4. This number is needed when you set up your application (eg OziExplorer)


You will now need to go to your application and change it to use this new COM port number. The example below is for OziExplorer.

Note: If you are using the Garmin Fleet Management cable, ie connecting OziExplorer to a Garmin Nuvi, make sure you have OziExplorer V3.95.g or later AND the 12v cig plug is plugged in and power is tuned on. You cannot use this cable will the Nuvi is powered from battery only.

bulletSelect the configuration option with OziExplorer, File, Configuration




·        Click on "COM" tab


·        Set the General COM Setting to match your COM port number, in this example 4

·        Make sure the other settings match your GPS, for example:



Upload/download 9600


Garmin USB is NOT ticked


Use PVT is ticked  - make sure the interface mode on your GPS is set to GARMIN

Magellan Meridian


Upload/download 4800 ­– make sure that the BAUD rate on the GPS is the same.


Garmin USB is NOT ticked


Use PVT is NOT ticked

"Mouse"  style GPS


Brand/Model - NMEA


NMEA Baud Rate 4800


Turn on your GPS. You are now ready to use your software, adapter/cable and GPS.