Ensemble Communications ODU-2800-002 LMDS Base Station Transceiver User Manual Install Guide BS ODU

Ensemble Communications Inc. LMDS Base Station Transceiver Install Guide BS ODU

Install Guide BS ODU

4
Ensemble Communications Inc.
Installing the Base
Station Outdoor
Unit (ODU) 4
This chapter details how to install the base station Outdoor
Unit (ODU). Before beginning the process, review the
preinformation in Chapter 3.
Chapter Topics Ancillary Materials 4-2
Antenna Installation 4-6
Antenna Polarization 4-6
Azimuth Alignment 4-7
Bracket Mounting 4-3
Cable Terminations 4-8
Elevation Alignment 4-7
Ground Mast 4-3
IF Cable Installation 4-8
Lightning Suppressor Installation 4-4
ODU Components 4-2
ODU Installation 4-3
Redundant ODU Installation 4-7
Tools for Installation 4-2
Unpacking and Inventory 4-2
Ensemble Communications Inc.
4-2
Operator’s Guide to the Fiberless System
Unpacking and Inventory
•Unpack the equipment on a flat, clean surface at the installa-
tion site.
•Check the items received against the packing list and a copy of
the purchase order to ensure that the order is complete.
•Check that the ODU has the frequency band and polarity
ordered. This information is on the manufacturer label.
•Inspect all components to determine that they are not dam-
aged. If a component appears to be damaged or is missing, con-
tact your shipper and Ensemble Customer Service
immediately.
•Save all packing materials.
Note Ensemble Customer Support is available at 888-710-8910.
ODU Components The following components comprise a baseline ODU:
•Outdoor radio-antenna unit (ODU)
•Pipe or wall mount kit
Note The type of mount is specified at the time of ordering. Mounts may be
ordered in either standard or metric measure.
Ancillary Materials The following materials are required to install the base station
ODU, depending on your site specific requirements. See “Ancillary
Equipment” on page 10 for a list of recommended materials and
manufacturers. If in doubt, check with Ensemble Customer
Service.
•3M type 33 electrical tape
•3M electrical coating (PN 054007-1483)
•Wire ties
•Black nylon wire ties for outdoor use
•RG-6 75 Ohm cable (Belden 9248)
•TNC connectors and connector kit
Tools for Installation •1/2-inch and 7/16-inch sockets with wrench
•2-inch extension (optional)
Ensemble Communications Inc.
Installing the Base Station Outdoor Unit (ODU)
4-3
ODU Installation
Note Installers are responsible for supplying mounting bolts.
Ground Mast All steel mounting structures attached to the building and the
antenna mast must be connected to the building grounding
system. If no grounding system or ring is available, ground the
antenna mounting structures to the nearest structural beam. The
grounding conductor should be at least a # 2 (AWG) solid tinned
copper wire. Use exothermic welds (Cad Welds) when possible to
connect to the mounting structure and the building grounding
system.
Bracket Mounting 1. Attach the ODU mounting bracket to a mast between 2- and 4-
inches in diameter (1 in Figure 4-1).
2. Remove the nuts and washers (2 in Figure 4-1) from one side of
each of the two mounting clamps (3 in Figure 4-1) and slide the
mounting clamps off the bolts. Set them aside in a safe place.
3. Slip the mounting bracket (4 in Figure 4-1) around the mast.
4. Reattach each of the two mounting clamps with the flat washer,
lock washer, and nut.
5. Tighten with a 1/2-inch socket wrench until secure.
Ensemble Communications Inc.
4-4
Operator’s Guide to the Fiberless System
Figure 4-1. Pole Mount Assembly
Lightning Suppressor
Installation Caution
It is not possible to guarantee that lightning protection will be
100 percent effective against a direct lightning strike.
Note A lightning suppressor is not shipped with the ODU. See page 3-10 for
the Ensemble-recommended lightning suppressor.
Install one suppressor as close as possible to the point at which the
cable enters the building. Install another suppressor as close as
possible to the ODU. Figure 4-2 and Figure 4-3 show this
installation.
•Orient the grounding stud on the suppressor as shown in
Figure 4-2.
•Use both a lock washer and flat washer with each bolt.
•Attach ground strap between the ground stud on the suppres-
sor and an antenna-mounting bolt as shown, making sure that
pole is grounded and connections are clean.
(1) Mast
(3) Mounting
Clamps
(4) Mounting
Rack
(6) Elevation
Markers
(5) Alignment
Bracket
(7) Azimuth
Alignment Bolt
Vertical Alignment
Bolt
(2) Mounting
Bolts
Ensemble Communications Inc.
Installing the Base Station Outdoor Unit (ODU)
4-5
•Install 75 ohm TNC male connectors on each end of an 18-inch
RG-6-type coax jumper cable using Ensemble-approved cable
and crimp type connectors.
Figure 4-2. Lightning Suppressor Assembly
Grounding
stud
Ground
strap
Suppressor
Ensemble Communications Inc.
4-6
Operator’s Guide to the Fiberless System
•Connect jumper cable to ODU (A) and suppressor “Protected”
connector (B) as shown in Figure 4-3.
•Connect the RG-6-type coax cable from the Fiberless indoor
unit to the connector (C) on the suppressor labeled “Surge.”
•Weatherize all connections.
•Tie RG-6-type cables to the mast.
Figure 4-3. Lightning Suppressor Assembly Closeup
Antenna Polarization The Fiberless Base Station ODU can be ordered for either vertical
or horizontal polarization. Confirm that the ODU you are
installing matches the polarization shown on your site design plan.
Antenna Installation Note The final mounting and alignment of the antenna requires two installers:
one to hold the antenna in place and the other to fasten the bolts.
1. Check that the antenna has the correct frequency band and
polarity per the network plan.
2. First installer: Lift the antenna onto the alignment bracket,
aligning the arrows on the ODU over the elevation markers (6
in Figure 4-1).
3. Second installer: Fasten the ODU onto the bracket using 7/16
nuts, lock washers, and flat washers (this requires three sets).
From
Indoor Unit
Outdoor Unit
Ensemble Communications Inc.
Installing the Base Station Outdoor Unit (ODU)
4-7
Azimuth Alignment 1. As needed, use a ratchet wrench and a 7/16-inch socket to
loosen the azimuth alignment bolt (7 in Figure 4-1).
2. Verify the mounting bracket is aligned with the correct azimuth
according to your site design plan.
Note If necessary, consult an USGS geographic map to identify distinctive
landmarks to get a precise bearing.
3. Point the base station ODU in the appropriate azimuth direc-
tion.
Note A compass may not give an accurate reading because of nearby metallic
objects or surfaces.
4. After the antenna is properly pointed, tighten the alignment
bolt until the ODU is secure, taking care not to over tighten it.
Note While fastening the mounting clamps, ensure the mounting bracket
remains aligned with the correct azimuth according to the site design
plan.
5. Verify that the antenna direction has not changed.
Elevation Alignment 1. As needed, loosen the elevation alignment bolt using a 7/16-
inch ratchet wrench.
2. Using a level, set the base station ODU at the proper elevation
angle.
3. After the antenna is properly pointed, tighten the alignment
bolt.
Redundant ODU
Installation
To protect against both ODU and cable failure, cable and install a
second (redundant) ODU separately from the primary unit. Such
ODUs are installed in the same manner as the primary ODU.
Note For redundancy, a second ODU is required for each sector of one or
more primary ODUs.
Ensemble Communications Inc.
4-8
Operator’s Guide to the Fiberless System
IF Cable Installation
Caution
If the base station has been powered up, power it off before
connecting or disconnecting the RG-6 cable at either end
because the cable may have –48 VDC across the connector.
1. Run RG-6 coaxial cable between the base station and the ODU.
The maximum permissible individual cable run length is 1,000
feet (300 meters). Ensure there is an 18-inch (45 cm) service
loop at each end of the cable.
When required, encase cables in plastic or metal conduit or
cable duct, maintaining a minimum bend radius of two inches.
Note Depending on local codes and the HVAC design of a particular building,
plenum-rated cable may be required.
Normally, cables between the ODU and the indoor base station
equipment should not be spliced. However, if a cable splice
cannot be avoided, use only approved connectors.
2. Label each end of the cable individually with numbers or col-
ors using a cable labeling tape such as is available from 3M.
Cable Terminations The RG-6-type coaxial cable uses a male TNC connector to connect
to the ODU. Follow the instructions from the connector
manufacturer to prepare the cable and install the connector. Use
only the recommended crimping tool. (See page 3-10 for the
recommended tool.)
1. Install the TNC connector on the IF cable.
2. Connect the cable to the lightning suppressor.
3. Make an 18-inch (45 cm) IF jumper cable with a TNC connector
on each end.
4. Install the 18-inch IF jumper cable between the ODU and the
lightning suppressor.
5. Waterproof the connector using a sealing type of heat shrink-
able tubing, cold shrink tubing, or 3M type 66 vinyl tape with a
coating of 3M electrical coating.
Note Waterproofing is not required for connectors terminating inside.
6. At the base station, install a TNC connector on each IF cable.
See page 5-7 for connections at the base station indoor equipment.

Navigation menu