Installation guide

Installing the hardware Page 35 of 206
Meridian Companion Installation and Maintenance Guide
Installing external antennas and lightning surge arrestors
There are three types of external antennas:
• indoor directional
• indoor omnidirectional
• outdoor omnidirectional
There are separate installation procedures for each type. You need to install a
lightning surge arrestor for each outdoor omnidirectional external antenna,
which is not included with this type of external antenna.
Installation requirements
• If installing an external antenna on a metal surface greater than 18 cm in
diameter, position the antenna perpendicular to the surface.
• Always ensure that the antenna is clear of any adjacent obstruction,
particularly metal. If more than one external antenna is used at a cell
center, the antennas should be spaced at least 0.5 m from each other to
avoid radio interference problems.
• When running the coaxial cable inside or outside, take care not to kink,
stretch, or crush the cable as which will seriously affect its performance.
The minimum recommended bending radius is 20 mm.
• Use RG-58/U coaxial cables to connect the antennas to the Base
Stations..
ATTENTION!
Only passive antennas may be connected to the
Companion Base Stations.
The coaxial cable connecting the external antenna to a
Companion Base Station must have an impedance of
50 ohms.