User's Manual

Leadtek GPS LR9553D Bluetooth Data logger & Receiver

11. Appendix D: GPS FAQ

Q. Do I have to pay extra charges for receiving GPS signals?

A. No. Like listening to the radio, you only need to buy hardware (PC+GPS or PDA+GPS) to

access the service. There is no extra charge.

Q. I bought a GPS device in Taiwan. Can I use it abroad?

A. Yes. GPS signals cover 98% of Earth’s surface (except the North and South Poles), so you

can use it around the world.

Q. What datum does GPS devices use?

A. It uses WGS 84.

Q. What causes time lapses in navigation? My vehicle has arrived at a specific location, but

why did not the vehicle indicator in the navigation system reach there at the same time?

A. There are several possible causes:

1. Poor reception of GPS signals;

2. The processing speed of CPU, RAM and memory card on the PDA;

3. Time lapses are inevitable because GPS is updated once a second.

Q. What kind of navigation software can I use?

A. Generally you can use any navigation software featuring NMEA1083 as the data output

format.

Q. My device has been successfully connected, but why can’t I see GPS signals in Navigator,

and why does GPS fail to position?

A. This may be caused by errors in COM port settings. The automatic GPS scan function of

general electronic maps may lead to failure in GPS positioning. We suggest that you set the

options manually.

Q. After using Navigator for positioning, why can’t I find the GPS antenna on the electronic

map?

A. Navigator is an application developed by Leadtek to test GPS navigation. After launching

Navigator, if you press x or go to the map without disconnecting the program, it will occupy

the GPS antenna’s COM port. In that case, the map is unable to find the device. To solve

this problem, disconnect Navigator before exiting the program.