Datakom D-500, Руководство пользователя

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D-500 User Manual Rev_06 Firmware V-5.8
K35D05-EN - 123 -
The GPS location determination is based on signals transmitted by GPS satellites circulating in
earth’s
orbit. 24 satellites are available in total, but the number of satellites in sight will depend on the physical
location and time.
A minimum of 3 satellites are necessary to determine the location. A fourth satellite is used for
verification. More satellites will mean more precision. The unit displays the number of effective satellites
on its GPS screen.
GPS satellites transmit a precision date and time information as well. This information is displayed on the
GPS Screen, but not used elsewhere.
The location determination quality of the GPS module will depend on the physical location. The GPS
should be installed in a location where it is capable of seeing a large portion of open sky. It can also work
on reflections from ground or other buildings without seeing the sky, but location precision will affected by
this.
Geographical location is stored in a non-volatile memory once an hour. Thus if the GPS signal is lost, the
unit continues to appear at the same location of the remote monitoring system. However a GPS warning
will be generated on loss of signal or communication with the module.
It is possible to program the geographical location inside the controller, forcing it to appear at the desired
location of the remote monitoring system. The location setting is done through Rainbow Plus only.
Location parameters are found under: Communication>Basic tab
GPS based location has priority over GSM based
location. If both type of locations are available, then
GPS location will be used.
If more than one GPS modules are attached, both are
used.
Detection of a USB-GPS is automatic. The unit will
detect and use it without any programming.
Latitude
Longitude