User's Manual

UV-rated coax and power cable should be used outdoors, and UV-, plenum- or Riser-rated
cable can be used indoors. In some buildings, a Plenum-rated cable is required. Consult the
local codes.
The ground wire should be #6AWG copper connecting the pipe and Transmitter housing to
building ground. Follow the local code requirements.
A surge suppressor
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is needed at the building entrance or in the equipment room; the location
depends upon local code. Arcwave recommends the PolyPhaser IS-75F-C1 protector, as in
Figure 3-3, for the IF coaxial cable.
Figure 3-3: PolyPhaser coaxial cable lightning protector.
Arcwave recommends the PolyPhaser IS-17VDC-30A-NG protector shown in Figure 3-4 for DC
power.
Figure 3-4: PolyPhaser DC lightning protector #IS-17VDC-30A-NG.
If the installation requires a separation between the Transmit module and the omni antenna,
then the installer will have to use a suitable coaxial cable type, with N-type connectors at each
end. Suitable cable at the 5.8 GHz transmit frequency is Cablewave Low-Loss ½ inch foam
FLC 12-50J, which has about 6.1 dB loss/100 ft, so a 10 ft cable is suitable. So are FSJ2-50
and Times LMR-400.
3.1.3 DC Power
The AR2250 Transmitter must be powered from 8.0 to 8.5 Vdc at the Transmitter connector.
The Transmitter typically consumes 550-650 mA (see Data Sheet).
The wire gauge can be selected, preferably for less than ¼ Volt drop from the power supply to
the Transmitter.
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The manual uses the terms “surge suppressor” and “lightning protector” interchangeably. It is
understood that a lightning bolt has enough energy to light a town for a year, so a direct lightning strike
will melt/damage all the metal it touches, including the antenna.
June 2003 Page 3-3