Neptune 13458-000, Руководство по установке и обслуживанию

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Feed Line Requirements
Consider the following.
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The antenna and feed line system installation must be certified
by the installer after it is completed. The installer confirms that
the installation is performing according to specifications.
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The cable must be secured at intervals per manufacturer
specifications on vertical and horizontal runs. Horizontal runs
may require a bridge to prevent damage.
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The feed line and connectors maximum loss must be less than
3dB.
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The feed line must be bonded at the top of the tower and at
the base of the tower. Use Andrew bonding kits and
procedures for all bonds.
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The feed line should be bonded at regular intervals down the
tower for towers over 150 feet tall. The general
recommendation is that the feed line should be bonded by a
minimum of 200 feet. Site requirements and standard practices
should dictate the configuration.
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A surge protector can be installed on the tower near the
antenna to help protect the feed line, but it is optional.
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The cable should not exceed the bend radius. This helps
prevent damage, which is not always visible on the exterior of
the cable.
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The AVA5-cable (or larger) needs jumpers between the larger
cable, and the collector and antenna connectors.
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The installation could use more than one type of coax cable.
The 1/2-inch cable is flexible and may be used for the last
section of a coax run to the collector, if the additional
flexibility is required. See "Coaxial Cable Lengths for the
Gateway" on page 103.
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The installation instructions for the Heliax Coaxial Cable are
provided by Andrew. See Bulletin 17800B Revision C.
Neptune can supply a PDF copy by request through Customer
Support.
R900 Gateway Installation and Maintenance Guide 105
Appendix C RF Antenna and Coax Installation