User's Manual

Siting Collectors or Repeaters
TDC-0971-011 CCU 100 and Repeater 100 Installation Guide 11
Proprietary and Confidential
All grounding materials and procedures must meet or exceed local codes. Use coaxial
grounding kits recommended by the coaxial cable manufacturer.
Warning Under no circumstances should the antenna grounding wires be run
inside a building. Always install ground bars and grounding material on the
building's exterior.
To ground an antenna system
1. Mount a copper ground bar near the antenna. This is the top ground bar.
2. Mount a second copper ground bar near the collector or repeater. This is the bottom
ground bar.
3. Connect the two ground bars with a #6 gauge green jacketed stranded wire or a #2
solid copper wire.
4. Ground the antenna mount and the top coaxial ground kit to the top ground bar.
5. Ground the bottom coaxial ground kit and the lightning arrestor to the bottom ground
bar.
6. Connect the bottom ground bar to one or more earth ground rods.
7. All ground wires should be connected straight to ground, with no right angle turns or
sharp bends in the wires.
8. Install ground leads on coaxial grounding kits without loops or bends.
9. Install grounding kits in the proper orientation per the manufacturer's specifications.
For more information about grounding and bonding, see Grounding Specifications on
page 93.
900 MHz Antenna
The 900 MHz antenna transmits and receives data messages from endpoints and repeaters
in the network.
There are three antennas that can be used for the 900 MHz radio link.
• A standard vertically polarized antenna (5 dBi) directly attached to the collector or
repeater.