Globalsat BU-353S4 User Manual page 7

LED Status indicator on the USB GPS"
LED OFF: GPS receiver is off (no power).
LED ON (solid): No fix, searching for GPS signals.
LED FLASHING: Position fix established and GPS signals are being received.
Always select an area in the vehicle where the GPS unit will be secure and not obstruct normal driving,
visibility and safety, but still maintaining a "view to the sky" in order to receive satellite data.
It is recommended that you first load and test your GPS receiver with the GPSinfo.exe. This process
will confirm you have found correct COM port number and have configured it properly.
1. Run to load the utility.
GPSinfo.exe
2. Enter the proper COM port for your GPS device (see COM Port Verification above)
3. Set COM port to Baud rate: 4800
4. If no errors have been made in configuration, there should be GPS data being displayed in the
window, which is confirmation that the communication between the GPS device and the "GPSinfo"
software is working properly.
5. If there is no GPS data displayed (or data with multiple zeros in them), please exit the software and
unplug the GPS receiver from the USB port and reinsert it after 10 seconds to reset the device.
The above screen shows the available satellites (numbers) and their signal strength.