DH Satellite 60 Heavy Duty Polar/Powered Dec - Manual (Page 16)

PREPARING THE C BAND FEED ASSEMBLY
If the feedhorn you have selected has an adjustable scaler ring, move it to the proper wave guide
setting as per the manufacturer’s instructions. Below, we have listed the focal lengths and focal
length/diameter ratios for our commercial antennas, so just find your antenna size and you will have the
information to set the feed properly.
.
Figure #10
1/2" x 1 1/2” Bolt
1/2” Rubber Washer Antenna Surface
1/2” Steel Washer
1/2 “ Nut
1/4” x 1 1/2” Bolt
3/4” Feed Strut
Collar
Antenna Size Focal Length Focal Distance
10’ (3.0m) 36” f/l .3 f/d
11’ (3.3m) 36” f/l .273 f/d Discontinued
12’ 5” (3.8m) 57.6” f/l .38 f/d
14’ (4.2m) 57.6” f/l .342 f/d
14’ 9” (4.5m) 57.6” f/l .33 f/d
16’ (5.0m) 57.6” f/l .3 f/d
Your DH representative should have asked you what type feed you will be using. We need this
information to be assured we are sending the proper collar to attach your feed to your struts. Take the
collar and set it on the back of the scaler ring of the feedhorn. Turn it until all three holes line up between
the two and insert the 1/4” x 3/4” bolts through the scaler ring and then through the collar; fasten with the
1/4” nuts. Most C-band and dual feeds have a 3-bolt pattern on the scaler ring as described above.
For SEAVEY type feed please refer to page 13 figure #12.
For CHAPARRAL type feeds refer to figure #10. Slip the feed strut into a tab on the collar and line up
the two holes. Insert the 2- 1/4” x 1 1/2” bolts into the holes and tighten with the 1/4” nuts. Proceed with
all four struts then check focal length and tighten down.
1/4” Lock Washers and Nuts
(For use of Chaparral (Universal) Feed)
Page 12
Strut Local On Ring Face of 1pc Antenna 12 Tab Ring
Strut Local On Ring Face of Sectional and 1pc Antenna 16 Tab Ring
NOTE: Strut length includes bent end.