Installation Instructions
Feeds
for Microwave Antennas
 Bulletin 37870
Description

These feeds are designed for installation in shielded
standard, and focal plane types of parabolic antennas.
The feed is designed for positive metal-to-metal contact
between the feed and the reflector. Therefore, no separate
ground wire is required. The mounting hardware includes
either standard or thin-head bolts and requires the use of
13 and 17mm wrenches.
Notes:
  1. As shown in Figure 1, a foam absorber
    material is applied to certain feeds and is
    related to RF performance.
    Do not remove this absorber.

  2. As shown in Figure 2, some feeds are
    furnished without vertex plates, some with
    vertex plates, and some with vertex and spacer
    plates. Feeds that do not require plates are
    identified by a label on the front of the feed
    hub.

  3. Do not remove the flange covers until
    you are ready to connect the feed to the feed
    lines. The flanges must remain clean and dry.

  4. The feed is normally installed from the front
    side of the antenna. However, when a feed
    must be replaced on an installed antenna,
    consider the recommendations given in the
    separate section titled "Feed Replacement Recommendations" at the end of this bulletin.
Figure 1
Notice

The installation, maintenance or removal of antenna
systems requires qualified, experienced personnel.
Andrew installation instructions have been written for
such installation personnel. Antenna systems should be
inspected once a year by qualified personnel to verify
proper installation, maintenance and condition of
equipment.

Andrew disclaims any liability for the results of
improper or unsafe installation practices.


Figure 2
Figure 2. Feed Mounting Variations
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