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BT338_GPS_v2.0
BT-338 GPS
Auto Shut-Off (Power-Saving Mode)
BT-338 Version 1.0 (v1)
To conserve battery life, whenever the GPS receiver does not detect a Bluetooth signal for over 10
minutes, the BT-338 will automatically shut off regardless if the GPS is connected to external power or
running off the internal Li-ion battery All LED’s will go off simultaneously.
BT-338 Version 2.0 (v2)
To conserve battery life, whenever the GPS receiver does not detect a Bluetooth signal for over 10
minutes, the BT-338 will automatically shut off, but only when operating from it’s internal Li-ion battery.
If connected to an external power source (AC or DC charger), then the BT-338 will remain on.
(Note: BT-338 with serial numbers between 55301~ 63000 and those starting from 67001 and higher are all v2)
We strongly suggest that you first test your USG GPS with the included GPS Info utility program to
confirm that the GPS receiver if 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/
)
5. INITIALIZING YOUR GPS RECEIVER
Before using your Bluetooth GPS 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 device loaded and
configured with your mapping software to an open area that has a clear view to the sky. 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 (Green 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 scrolling with zero’s means 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).