HP iPAQ Glisten-AT&T Identify the COM port for your GPS receiver, Troubleshoot frequent GPS signal loss and interference, Done, NOTE:, NOTE:, NOTE:, Automatic Update

To reduce the time to find your initial position, you can also make sure you have a clear view of the sky and you are stationary.

NOTE: GPS Data downloads new data if the last downloaded data is expired. The expiration time on the data is set to 24 hours.

Enabling the GPS Data application might involve additional data connection charges.

To enable GPS Data:

1.Press Start , tap Settings > Connections > GPS Data.

2.Select the Automatic Update check box.

3.Tap Done.

After the GPS data file has been downloaded, you might see improvements in the GPS performance as the time to find your initial position is reduced.

NOTE: To disable the GPS Data application, clear the Automatic Update checkbox.

Identify the COM port for your GPS receiver

Some GPS applications require you to specify the COM port for your GPS receiver. You can find information on the COM port by pressing Start , tap Settings > System > External GPS, and

then noting the GPS Program Port.

Troubleshoot frequent GPS signal loss and interference

To improve the satellite signal to your phone, go outdoors and start the GPS navigation software. Place your phone where there is a clear view of the sky or on the dashboard of a vehicle that does not have thermal glass windshields or windows. A direct line of sight is required between the iPAQ and the GPS satellites to access information from the satellites.

NOTE: Interference might take place close to tall buildings, large trees, and under very cloudy or overcast skies. Try to avoid these obstructions before using GPS.

Interference Type	How to Avoid
Vehicles with thermal glass windows and windshields.	Place the iPAQ where there is a clear view of the sky or on
	the dashboard of a vehicle that does not have thermal glass
	windows.
Equipment radiating Radio Frequency (RF) energy or emitting	Move away from interference source or switch off the
strong electromagnetic radiation. For example, microwave	interference source.
ovens, high-power cordless phones, CB radios,
Walkie-talkies, HAM equipment, or X-ray and MRI machines.
Tall buildings, large trees, and very cloudy or overcast skies.	Move away from interference source so there is a clear view
	of the sky.

118 Chapter 22 Use AT&T Navigator and other GPS Applications