MN.00273.E - 004 91
• Prepare the polarization disk (see Fig.36) with the two O-rings: seal and lubricant grease Dow Corn-
ing 4 must be applied to the O-ring, protecting fingers with gloves; each O-ring must be inserted in
the proper track on each surface of the disk
• Move the marking reference, present on the twister disk, to H or V label of the hybrid flange (an-
tenna side), to set the polarization, as shown in Fig.36
and tighten the four screws (torque value as
in Tab.21
)
• Mount the hybrid on the back of the antenna tightening four M10 bolts (2) with crossed method
(first bolt on high position left, second bolt on the opposite side following the diagonal, then do the
same with the other two bolts (see Fig.37
)
Mounting each ODU on the hybrid:
• screw partially four 25 mm M10 bolts positioning them in the holes (3) on the hybrid flange (ODU
side): each bolt should be tightened to have the square head out of the hole of about 13-14 mm,
use 15mm spanner
• Apply seal and lubricant grease Dow Corning 4 to the O-ring, protecting fingers with gloves and in-
sert in the proper track on the ODU flange
• Position the ODU vertically near the four bolts on the antenna flange and align the ODU to match
the polarization of the antenna feeder: horizontal polarization must be used, the handle of the OU
is at the bottom right corner
• After the right position has been found, rotate 30° counter clockwise the ODU and approach it to
the antenna flange in order to have the four slots of the Standard Lock cross between the four bolts
on the hybrid
• Rotate 30° clockwise the ODU to hook each slots on the relevant bolt
• When each slot is firmly hooked on the relevant bolt, tighten each bolt (use 15 mm spanner, torque
= 46 Nm)
• Optional: sun cover kit - insert the sun cover and tie one of its bottom holes to the ODU handle by
means of the block plastic strip included in the sun cover kit
• Now the ODU is ready to be connected to the grounding cable and to the Lan cable
Attention: Leave 25 cm straight Lan cable between Amphenol connector and first bending to secure water-
proof IPX5
• Repeat for the other ODU on the other side.
Tab.21 - Torques for tightening screws
Frequencies Screw Tool Torque
from 18 to 38 GHz Allen screw M3 Allen key 2.5 mm 1 Nm
up to 15 GHz Allen screw M4 Allen key 3 mm 1 Nm
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