GLOBALSAT GT-100 - Manual (Page 6)

2. Your USB GPS MUST be plugged into your USB port at this time.
3. Using Window’s Control Panel, select System > Hardware > Device Manager
4. Then look under the heading of: PORTS (Com & LPT)
5. There should be a listing for: Prolific Serial-to-USB Com Port (COM x)
(where “ x ” is the number your PC has assigned the USB GPS receiver).
6. Once you have identified the COM port number, any software that you utilize must be
configured to read GPS data from this COM port.
We strongly suggest that you first test your USB GPS with the included GPS Info utility
program to confirm that the GPS receiver is functioning properly on your PC and that you have
successfully configured the right COM Port setting. Once this has been done, close the GPS
Info program and start your application for COM port configuration.
NOTE: By default, your PC will not allow you to run multiple applications from a single COM
port. It is important that you close any previously opened GPS application before switching to
another GPS application as the GPS receiver and data will not be found by the new program.
There are special utilities available to split data into multiple COM ports for use by more than
one application simultaneously. See:
http://franson.com/gpsgate/
4. INITIALIZING YOUR ND-100S
Before using your ND-100S receiver for navigation (especially for the first time), the receiver must
obtain a local GPS fix (coordinates) of the current position. To do this, take your laptop (with your
USB driver and the mapping software loaded and configurable) to an open area that has a clear
view to the sky (such as a park or empty field). Start your software (or the included GPS Info utility
program) and wait for initialization of the GPS to complete. This may take a few minutes
depending on various factors such as the distance of the current coordinates from the last time the
GPS receiver was activated, GPS signal strength and surrounding terrain (tall trees and buildings
can block the satellite signals). Once the RAW GPS data is displayed onto the screen, if
applicable for your software, a fix has been initialized (blue LED on the GPS will also start to flash).
In some cases initialization can take up to several minutes depending on the conditions mentioned
above before complete GPS data will be displayed on the screen.
Coordinates with scrolling zeros mean that the port connection is complete but the satellite data is
not being received yet (possibly still initializing or in a bad area for satellite reception).
5. USING ND-100S (Windows)
After completing the application installation and ND-100S connecting with the NB properly, we will
be able to open the application on the desktop click