USER’S GUIDE SF-2110, User Manual

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SF-2110 User Guide – Rev. A
(which translates into signal strength) throughout
the entire elevation tracking path.
9
Map obstructions above the horizon using
compass and inclinometer. Use satellite predi
software with a recent satellite alm
a
ction
anac to assess
e visibility at that location
he
e is required to track the
syn
cur
West,
°
East. An inclination and bearing estimation tool is
available on NavCom’s website to aid in
determining potential obstructions to StarFire™
signal.
L-Band Antenna (SF-2110R Only)
The separate L-band antenna for the SF-2110R is
used in high latitude applications and most frequently
on m
a
ould y
antenn
precau
platfor
locate the st
pat
bes
ant e
avo
the impact on satellit
(available on NavCom’s website).
9
A clear line of sight between the antenna and t
local INMARSAT satellit
StarFire™ signal. INMARSAT satellites are geo-
chronized 35,768kms above the Equator,
rently at Longitudes 142
°
West, 098
°
°
West, 025
°
East, 109
°
East, and 143.5 15.5
arine vessels. This is an active antenna,
meaning it has a built-in LNA. Therefore, this antenn
sh
have good isolation from other near-frequenc
ae. The best practice is to follow the same
tions as the standard GPS antenna. On
ms with many antenna systems, it is better to
andard GPS antenna closer to the
wheelhouse, but out of the radar or satcom beam
h and the L-band antenna high on the mast. For
t performance, do not allow more than 7dB of
cable loss between the antenna and the receiver.
Applications at high latitudes without the L-band
enna should mount the GPS antenna high on th
mast, with the same considerations for beam path
idance and cable loss limitations.
* Consult Release Notes on the NavCom web site for availability.
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