GPS/GNSS Antennas and Accessories

Its conical radome is made of high impact UV stabilized polycarbonate to minimize ice, snow and debris build-up. It can be mounted in a 19mm diameter (3/4 inch) through hole or via its L-bracket.

Antenna Location

The GPS/GNSS antenna must have an unobstructed line of sight to the sky. Rooftops that are clear of other structures or geographic features overhead, with views to the horizon, generally make good installation locations. Such a clear view allows the antenna to track the maximum number of satellites. Installations with obstructed views may experience reduced reception quality and may not be able to track the maximum number of satellites. When installing a GPS/GNSS antenna, select a site at which the antenna will not become buried in drifting or accumulated snow. It should not be covered by foliage or placed in a position where it could become obstructed. If possible, avoid placing the antenna in close proximity to broadcast antennas.

Antenna Cable & Accessories

Spectracom recommends low loss coaxial cable such as Times Microwave LMR-400 for the antenna cable. The attenuation characteristics of the LMR-400, or equivalent, at the GPS L1 frequency (1575.42 MHz), along with the high gain of the antenna limits the cable length to a maximum of about 125 meters (400 feet). Spectracom offers standard and plenum rated cable assemblies.

For installations where the antenna cable length exceeds 125 meters Spectracom offers a variety of accessories to extend cable lengths including inline pre-amplifiers (Model 8227), fiber optic links and frequency down-up converters. The receiver powers the GPS/GNSS antenna and most accessories. Spectracom recommends installing a lightning protection device in the antenna line to protect the receiver and connected devices. Spectracom offers a Surge Protector, Model 8226, to shunt potentially damaging voltages on the antenna coax to ground.