Andrew 4.9-Meter ESA Operating And Maintenance page 31

Step 2
Step 3
Step 4
Step 5
302752
Subreflector
Setting Rod
Reference the appropriate feed installation drawing and install the feed system assembly.
Note: The feed installation instructions are packaged as part of the feed system kit.
Adjust the height of the subreflector with the 302752-( ) Subreflector Setting Rod. Rest
the square end of the setting rod on top of the first panel seam screw. Choose a screw
which is nearest one of the subreflector adjustment threaded rods. Refer to Figure 22 for
threaded rod adjustment locations.
Sweep the setting rod back and forth across the edge of the subreflector to find the
shortest distance. Adjust the height of the subreflector to within 1/32" (1 mm) of the set-
ting rod.
Center the subreflector using dimension "A". Refer to Figure 22 for subreflector center-
ing adjustment hardware location. Note: Dimension "A" should be taken from the edge
of the feed horn to the subreflector edge. Perform this measurement at 4 locations (Top,
Bottom, Left and Right).
Sweep tape measure back and forth across the subreflector edge using the shortest dis-
tance as dimension "A". Note: Dimension "A" should not vary more than 1/16" (1.5 mm) at
each of the four measurement positions.
Rest the Setting Rod on
Top of First Seam Screw
"A"
Feed Horn
Assembly
Screw On
Aluminum
Tip
Figure 21
31
Reference Drawing 240272
Setting Rod Types
70-3/4"
Ku-Band Setting Rod
71"
C-Band Setting Rod
Installation Procedures