Quick Installation Guide
Document
WERA4-Quick-US-200917
Page 32 of 73
The kind of connection of the Tx array depends on the distance between the Tx array
position and the container. If this distance is very long, the RF power loss on the coax
cable can be quite high. The cable loss depends on the distance, frequency and cable
type. Please refer to the “WERA Tables” to check if for your installation this cable loss can
be accepted.
To achieve the full performance of the system, at least 20 Watts (43 dBm) of RF power
should reach the centre of the Tx array. The outdoor version of the PA can generate up to
50 Watts (47 dBm), the standard indoor, rack mount version can generate up to 80 Watts
(49 dBm).
If the required cable length results in a much smaller value, the power amplifier should be
placed outdoors next to the Tx array. In this case a line power connection to this position is
required. Please check the kind of protection that is required for save operation in this
environment.
5.6
Install Antennas
The antenna poles need to be installed isolated from the ground. The recommend
construction is to use a metallic ground anchor, attach a wooden beam to that (at least
1.5m) and mount the antenna pole to that wooden beam. To stabilise that construction
guide ropes (
no metal
) should be used. For antennas not higher than 4 m overall one set
of guide ropes may be sufficient. For higher antennas we recommend to use two sets of
guide ropes.
Typical antenna construction for antenna
poles of up to 4 m length.
Antenna without radials and guy ropes
and with a “mirror” pole.