Opticon H21 - Manual (Page 102)

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10.5. GPS
The H-21 has a built-in GPS signal receiver that can be used to get the current location of the H-21.
To do anything useful with the location information, a navigating program is required, which is not
part of the standard software of the H-21. This should be purchased separately.
10.5.1.
GPS Settings
You may need to specify the GPS hardware port when installing the navigation software. The GPS
receiver in the H-21 can output the location data on a configurable port. To configure the port, follow
the steps below:
1. Tap > Settings > System > External GPS > Programs.
2. Enter the port that will be used by the GPS receiver to send the data.
10.5.2.
Using AGPS
AGPS stands for Assisted Global Positioning System. AGPS enables you to acquire a location
faster with the aid of cellular towers. Some benefits of AGPS:
· Faster location acquisition
· Conserves battery power
· Location acquisition indoors
To enable AGPS:
1. Tap > Settings > System > AGPS Settings.
2. Select the check box next to Enable AGPS as shown on the screen above right.
3. Tap OK to save and exit.
Improving the reception of Satellite Signals
It can take several minutes the first time you establish a GPS connection. If the device cannot detect
the satellite signal, try the following:
· Move the device to an open space without buildings or trees around it.
· Make sure there are no wireless communication devices (e.g. radar-detecting devices and
mobile phones) nearby since these products may cause unstable signal reception.