User's Manual

AR1205
AR2205-2
Figure 3-2: System diagram.
3.1 Installation Detail – AR2250 Transmitter/Antenna
The Transmitter and Antenna are two units joined with a short coaxial cable. They are normally
mounted on the same pipe.
3.1.1 Pole Mount
The omnidirectional antenna is mounted at the top of a 1.25 to 2.0-inch Outside Diameter (OD)
pipe, so that it radiates unobstructed in a full 360 degree circle.
The antenna is inside a cylindrical “plastic” PVC radome. It is connected to the Transmitter via
a short coaxial cable.
The Transmitter is a transmit module inside a weatherproof housing with pipe mounting
hardware.
3.1.2 Cabling
There are three cables between the equipment room and the Transmitter:
• IF coaxial cable
• DC power twisted pair cable
• Grounding wire
Arcwave recommends the use of premium quad-shielded RG-6 coaxial cable (such as Belden
1189A) for base station installations. This is used by the cable TV industry and it reduces
leakage through the shielding, as well as minimizing interference from outside sources.
June 2003 Page 3-2