RST100
USER
&
INSTALLATION
MANUAL
43
In determining the optimal location for mounting an external Iridium antenna in a
location where INMARSAT antennas are also located, be certain that the Iridium
antenna is mounted either to the side or behind the INMARSAT antenna, and above
or below it.
Also note that the length of the feed line (the cable running from the Iridium unit to
the antenna) plays an important role in the performance of the unit.
In addition to installing the Iridium antenna off-axis and away from the INMARSAT
antenna, installing a band pass filter between the Iridium unit and its external
antenna will provide the best protection from RF interference and degraded
performance. The use of a band pass filter, which at the present time is designed for
fixed installations only, will significantly improve the overall performance of the
Iridium terminal.