NorthStar 2505 Installation Manual page 26

SECTION TWO Installing and interfacing the 2505
Use the locking nut shown to prevent
rotation of the antenna or bottoming
of the mounting stanchion into the
threaded mount portion of the
antenna. If done with enough force,
either of these may break the
antenna.
Choosing the antenna's
mounting location
Wiring the antenna
Page 16
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Figure 2: Northstar AN205-P antenna dimensions
Mount the antenna near the top of the vehicle, where an
unobstructed view of the horizon is available in all directions,
but mount it lower than any high-power transmitting antennas,
such as radar or satcom.
Keep the antenna at least six feet away from objects that can
"shade" GPS or differential signals. If position data is
intermittent, check that you have the proper cable length, and
verify the quality of the antenna location and the quality and
proper termination of the connectors. Ensure that the 2505's
ground lug terminal is securely connected to vehicle ground.
CAUTION! Avoid mounting the antenna near rotating warning
beacons or strobe lights, electric motors, and
fluorescent
interference to the differential reception.
When connecting the antenna to the 2505, you can use the
supplied coaxial cable or fabricate your own. In either case, the
cable length must be a maximum of 50 feet. (Using a cable
longer than 50 feet will require an antenna with a higher gain;
contact Northstar for details.) Don't make any tight bends, and
fasten the cable along its length to avoid chafing or whipping of
any kind. Securely fasten all cable connectors.
TNC
3.5
lights. These can
2505 INSTALLATION MANUAL, Revision A
2.5
create RF