Wavespan Stratum 100, Installation And Maintenance Manual, Page: 15 / 67

Stratum 100 Installation and Maintenance Guide Installation
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7
Step 1. Installing and Mounting the ODUs
The instructions below describe how to assemble and mount a single IDU. You must repeat
the installation for each ODU.
Remove the ODU, pre-assembled Antenna Mount and Accessory Kit from their shipping
cartons. Save all packing materials in case you need them later.
Using the foam packing material to protect the painted surfaces of the antenna, carefully
place the ODU on a tabletop with the antenna facing down. The paint provides an important
extra barrier to UV from sunlight.
Set aside the accessory kit. You will use this hardware to attach the antenna mount to the
ODU, and to attach the complete ODU to a supporting mast.
Setting Antenna Polarization
Antenna polarization must be the same at both ends of any link . For single links, vertical
polarization is a good default. There is no performance difference. For multiple links
located on the same rooftop, alternating the antenna polarization of independent links is
recommended.
If the coaxial connectors are facing down the antennas operate with vertical polarization.
Connectors facing right or left produces horizontal polarization .
Attaching the Antenna Mount
Slightly loosen the six 5/16-18 bolts on the Antenna Mount slotted elevation arms and angle
brackets so that they can be positioned for the next step.
Position the Antenna Mount on the ODU so that the angle bracket attached to the two
elevation arms is along the edge with the coax connectors (vertical polarization). The other
angle bracket is bolted to the opposite edge.
Use 5/16-20x1” hex-head bolts, flat washers and lock nuts at three corners of the ODU as
shown. The next step describes the corner with the ground wire.
Locate the ground wire, which has #10 and 5/16” lugs on its ends.
Place a 1x5/16” hex head bolt through the 5/16” lug of the ground wire, followed by a 5/16”
flat washer. Place this bolt, ground lug and flat washer through the angle bracket and ODU
corner hole nearest to the #10 ground stud on the back plate of the ODU. Secure with a flat
washer and lock nut as shown.
Tighten all four corner bolts securely.
Place a #10 flat washer over the #10 ground stud, followed by the ground wire and a #10 lock
washer. Tighten this nut, but
do not over-torque .
Note : Avoid scratching the painted surfaces of the ODU during antenna mount installation.
Antenna Mast Requirements
The
ODU
must be mounted on a tubular steel or aluminum mast 1.9 to 3.9 inches in
diameter using the remaining hardware supplied in the antenna mount accessory kit.
The mast must be stable, not able to bend or rotate under extreme weather conditions, and
must provide a line-of-sight path to the other end of your link.
Attaching Mount On Mast
This section illustrates installation on a vertical mast. A horizontal support is perfectly
acceptable.
Cut the length of rubber collar material (using a sharp knife) so that it wraps around your mast
with a
small gap (.10 - .25 inch) between the ends .
Select the proper size hose clamp and install the rubber collar securely on the mast. This
collar is used to hold the weight of the
ODU during installation and antenna alignment.