Specifications

Installation | 9
3 Installation
MX521A Antenna Mounting Guidelines
The MX521A antenna housing is weather-resistant and
must be located outside where it will have a good view of
the sky around it. Use a standard 1”-14 TPI bracket for
mounting.
Install the MX521A antenna where it has a clear view •
of the sky around it.
Locate the antenna for easy access and maintenance. •
Stay away from high-power energy sources such as •
radar, SSB, INMARSAT and other transmitting radio
antennas by 5 meters or more.
Locate the antenna at least 10 meters away from and •
out of the transmitting beam of radar, INMARSAT and
other high-power transmitters.
Mount the antenna low to avoid excessive position and •
speed errors while underway.
Mount the antenna as far away as possible from large •
metal structures.
Mount the antenna about 1 meter away from the •
compass.
If you are not sure if the chosen location is appropriate,
you can mount the antenna temporarily and operate it
with the MX420 CDU. Monitor the operation of the
MX521A while you turn on other on-board electronic
equipment. Move the antenna around until the MX521A
operates satisfactorily then mount it permanently.