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4.4
FEED INSTALLATION
1.
FOCAL LENGTH - As shown in figures 5 thru 7, attach the feed horn assembly
to the four feed rods with the same 3/8" hardware as above. (For ku-band single
pol only, insert the feed cover tab (item #7) between the feed horn and the 3/8"
nut). Tighten the four bolts securely at this time. Check the focal length by
measuring from the face of the feed horn to the reflector cover plate as shown in
figure 8. If the focal length is incorrect, adjust the feed clevises in or out at the
reflector surface as needed. Be sure that the clevises are adjusted equally. When
the focal length is correct, tighten all feed support and clevis hardware securely.
The focal lengths are: 46-7/8" for the 3.4M and 54" for the 3.7M. The F/D ratios
are: .35 for the 3.4M, and .37 for the 3.7M.
Face of
Feed Horn
[ 2 ]
DAWNco • 3340 S. Lapeer Rd • Orion, MI 48359-1320 • Ph (248) 391-9200 • Fax (248) 391-9207 • sales@DAWNco.com
[ 1 ]
[ 4, 5, 6 ]
[ 4 ]
[ 3 ]
FIGURE 5.
3.4M & 3.7M Az/El TRUSS MOUNT
[ 1 ]
Face of
Feed Horn
[ 2 ]
26
4096-225
[ 4, 5, 6 ]
[ 7 ]
[ 4 ]
[ 3 ]
FIGURE 6.
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