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Chapter 12 Install Companion or DECT Systems 269
Installation and Maintenance Guide
Install an antenna (Canada)
There are three types of external antennas available in Canada:
• indoor directional antenna
• indoor omnidirectional antenna
• outdoor omnidirectional antenna
Each type of installation requires a specific installation technique. As well, you must install a
lightning surge protector for every outdoor antenna installed.
Outdoor requirements
Before you install the antenna, ensure that your plan meets the following requirements:
• If you are installing an outdoor antenna on a metal surface greater than 18 cm (7 in.) in
diameter, position the antenna perpendicular to the surface.
• When running the coaxial cable inside or outside, be careful not to damage the cable, which
affects its performance. The minimum recommended bending radius is 20 mm (0.8 in.).
• Always ensure that the antenna is clear of any adjacent obstruction or metal objects. If you use
more than one outdoor antenna at a cell center, separate the antennas at by least 0.5 m (20 in.)
to avoid radio interference problems.
• Use RG-58/U coaxial cables to connect the antennas to the base stations.
Caution: Use only passive antennas to connect to the Companion base stations.
The coaxial cable you use to connect the external antenna to a Companion base
station must have an impedance of 50 ohms.