4096-535
PRODELIN CORPORATION
3.8M C-BAND Rx/Tx ANTENNA SYSTEM
28
Refer to the part list and figure 8 for this section. Follow the instructions in the listed
sequence. Do not tighten any hardware until instructed.
1.
Apply silicone grease to [2] o-rings (item 7) and place [1] in the o-ring groove in
the circular polarizer (item 3). Attach the feed horn (item 1) to the circular
polarizer (end with the o-ring) with [8] #10 x 1.25 screws, [16] flatwashers, [8]
lockwashers and [8] #10 hex nuts (items 8,9,10,11). Tighten securely.
Note:
The
screws should be inserted from the feed horn side to prevent any interference.
2.
Bolt the OMT (item 2) to the circular polarizer by placing the remaining o-ring in
the groove of the OMT and fastening it to the circular polarizer with [8] #10 x 1.25
screws, [16] flatwashers, [8] lockwashers and [8] #10 hex nuts (items 8,9,10,11).
Note: The screws should be inserted from the circular polarizer side to prevent
interference.
For left hand polarization, align the "LHCP" on the flange of the
circular polarizer with the arrow on the OMT. For right hand polarization, align the
"RHCP" with the arrow on the OMT. Tighten securely.
Note: when a polarization
setting is attempted, installers should keep in mind that right hand and left hand
polarization refers to the transmission of signals from the feed to the reflector.
Then the reflector reverses signal. Therefore, a "LHCP" feed system results in an
antenna system that transmits a Right Hand Circular Polarized signal.
3.
Attach [1] bottom feed mounting bracket (item 4) and the circular polarizer
bracket (item 60 to the feed support tube plate with [4] 3/8 x 1.25 bolts,
[4] lockwashers and [4] hex nuts (items 13, 14, 15) through the feed mounting
bracket, circular polarizer and feed support as shown, and [2] 5/16 x 1.75 bolt,
[2] lockwasher,[4] flatwasher and [2] hex nut (items 18,19,20,21 through the
circular polarizer bracket and feed support tube only. Tighten securely
.
4.
Attach the remaining bottom feed mounting bracket (item 4) to the circular
polarizer bracket with [4] 3/8 x 1.00 bolts, [4] lockwashers and [4] hex nuts (items
12, 14, 15). Do not tighten.
5.
Place the feed assembly from step #1 into the brackets and secure by fastening
[1] top feed mounting bracket (item 5) over the neck of the feed horn with [2]
5/16 x 1.00 bolts, [2] lockwashers and [2] hex nuts (items 16,19,20). Fasten the
remaining top feed mounting bracket (item 5) over the neck of the circular
polarizer with [2] 5/16 x 1.50 bolts, [2] lockwashers and [2] hex nuts (items
17,19,20). Tighten the feed mounting bracket (from step #4) to the circular
polarizer bracket. The antenna system is now ready to be aligned to the satellite.