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Chapter 4
GNSS Antenna and Cable
Information
The Model 1133A comes complete with the necessary hardware to be able to receive GNSS signals:
50-feet of RG-6 cable and a GNSS antenna. Longer cables are available up to 250 feet (75 meters).
This section should help you with installing the GNSS antenna and antenna cabling to the
1133A. It should also be a source of information if you should need to troubleshoot the antenna
cable system. The Model 1133A achieves its accuracy by comparing the internal clock signal of the
Model 1133A to the incoming GNSS or optional IRIG-B signal.
4.1
GNSS Antenna Installation
To properly receive GNSS signals, the GNSS antenna needs to be mounted clear of buildings
and surrounding elements that would block the GNSS signals being transmitted by the satellites.
For complete coverage, the antenna needs to have a clear view of the sky from 15 degrees above
the horizon to directly overhead for all points of the compass. Minimal installations, where the
antenna is mounted in a less favorable location, may work however reception may be somewhat
limited during certain hours of the day.
4.1.1
Mounting the Antenna
To mount the antenna, you will need a short piece of gray, 3/4 inch plastic pipe nipple that can
be attached to a solid fixture. The piece of pipe nipple should be threaded up into the antenna
receptacle after connecting the antenna cable to the antenna. Arbiter Systems sells an antenna
mounting kit (part no. AS0044600) that simplifies antenna installation for a variety of locations.
Figures 4.1, 4.2 and 4.3 illustrate several components for a suggested mounting method.