Inmarsat Regional BGAN, Руководство пользователя, Страница: 23 / 58

A
NTENNA
P
OINTING
Establishing a new connection requires the careful orientation of the Satellite IP
Modem towards the Regional BGAN Satellite. The more precise this alignment, the
faster your data will be able to travel over the network. To ensure precise alignment,
the pointing operation is divided into a rough pointing operation followed by a fine
pointing operation.
To assist in rough Satellite IP Modem orientation, the stored GPS location is used to
obtain your location relative to the satellite. Using this geographic location data,
direction and elevation angle information is supplied to you on your computer’s
display. You can use this information in conjunction with the Satellite IP Modem’s
compass and elevation angle scale to obtain an initial orientation towards the satellite.
Once you have done this, station yourself
with your Satellite IP Modem’s “lid” (the
antenna) opened away from you (like the
display screen of a laptop computer) and
look out and over it to ensure that
nothing but open sky is between the
Modem’s lid and the Regional BGAN
Satellite. If the view is blocked by trees,
mountains, buildings or similar objects
then you must relocate the Satellite IP
Modem. This manipulation is called the
Rough Pointing procedure.
Do not stand in front of the Antenna
The Satellite IP Modem emits radio frequency energy when in the
transmit mode. To avoid injury, do not place head or other body parts in
front of the antenna when system is operational.
Once you have completed rough pointing, the connection can be “tuned” using the
fine pointing procedure. The tuning consists of small changes in direction (rotation of
the modem) and small changes in elevation angle (small up and down movement of
the modem’s lid). Signal meters are located on the modem and computer display; you
can use either one to maximize your signal strength. Finding the maximum for both
the direction and elevation angle settings ensures the best performance from your
modem.
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Regional BGAN Satellite IP Modem User Manual