Neptune R450 MC, Руководство по установке и обслуживанию

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Appendix A
54 R450 Mini Collector Installation and Maintenance Guide
• For sites that have multiple antennas, if possible, mount the
antennas one above the other, separating each from the other by
several wavelengths of the lowest frequency antenna. This will
minimize the interference between the systems.
• The exception to the previous rule is for cellular antennas. As long
as the R450 MC antenna is either above, below, or in the middle of
the ring of cell antennas, the two systems can coexist without
interference.
• Antenna sites that must share space with multiple transmitting
systems may require additional equipment to protect the systems
from interfering with each other. These sites may also require
additional engineering to make them perform well.
• If there are radio systems at the site that are already operating on
the 450 - 470 MHz band, it may be advantageous to combine the
signals into one antenna system using the appropriate equipment.
This often works better than attempting to protect the individual
systems from interfering with each other.
• Managed antenna sites may require additional equipment and may
dictate how an installation is to be performed. As long as the
installation meets Neptune's minimum requirements, following the
site's requirements is recommended.
Feed Line and Antenna Recommendations
Feed Line
The feed line is a significant contributor to both good and poor system
performance. A properly installed feed line is critical to optimal system
performance. Testing the antenna while it is on the ground can ensure
the system is working properly.
Installation of the connectors is best done with the proper tools and a
trained installer. With the proper tools and jigs, installing coaxial (coax)
connectors takes only a few minutes each. Not using the proper tools as
recommended by the manufacturer could potentially cause problems,
either immediately or after several years of apparently proper operation.
Usually a 450 MHz wavelength is ~26-inches.
Neptune recommends that you consult with a qualified installer on the
design and installation of the antenna systems. If the installer is
already familiar with the sites and the existing equipment, this can
make the installation go more smoothly.