NavCom SF-3050 Rev.I - Manual (Page 112)

SF-3050 GNSS Product User Guide – Rev I
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Chapter 5 ........................................................................ Installation
This chapter provides guidance on hardware installation for optimum performance.
Antennae
The 5/8 inch BSW threaded antenna mount has a depth of 16mm (0.63 inch).
It is possible to remove the 5/8 inch BSW threaded alloy insert to reveal a secondary
means of mounting the antenna, a 1-14UNS-2B thread with a depth of 16mm (0.63 inch).
This is a typical marine industry mount for navigation antennas. See Table 6 for P/Ns.

The BSW insert is secured in-place with an adhesive, and its removal will
change the shock and vibration sustainability characteristics of the antenna
mount.
Figure 106: Rover, Base, Airborne GNSS Antennae

Do not loosen or remove the Phillips screws on the base of the antenna for
mounting purposes. This will VOID the warranty and compromise the
environmental seal of the antenna, leading to internal damage.
Antenna placement is critical to good system performance. Avoid antenna shading by
buildings, rooftop structures, foliage, hills/mountains, etc.
Locate the antenna where it has a clear view of the sky, to an elevation angle of 7º if
possible. Obstructions below 15º elevation generally are not a problem, though this is
dependent on satellite availability for the local region.
Avoid placing the antenna where more than 90º azimuth of the sky is obstructed. When
more than 90º of azimuth is shaded, it is often still possible for the reciever to navigate;
however, poor satellite geometry (due to satellite shading) will provide poor positioning
results. Even 10º of shading can have a negative effect on performance, though this
generally is not the case.
Avoid placing the antenna on or near metal or other electrically reflective surfaces.
Do not paint the antenna enclosure with a metallic-based paint.
Avoid placing the antenna near electrical motors (elevator, air conditioner, compressor,
etc.)