User's Manual

Doc. No.
Rev.
Date
DRAFT
1.01
2012-01-27
Damm Cellular Systems A/S, Denmark
TetraFlex
®
7.5 Manual - BS421
TetraFlex® 7.5 Manual 1-17
1.2 BS421
1.2.1 Environmental / climatic requirements
The Base Station is designed for outdoor operation, such that it can be placed in the antenna
mast close to the antennas.
The Base Station is designed to be able to operate at severe environmental conditions.
The Base station is guaranteed to operate under ambient air temperatures from –25°C to
+55°C Celsius. Maximum BS421 cabinet temperature is +85°C. Storage temperature for the
BS421 is from –40°C to +85°C.
Note that the guaranteed MTBF data is valid only within the standard specified temperature
range
Screening of BS421 to specific customer defined temperature range (from -40°C to +55°C
ambient air temperature) is optional upon request.
The Base Station encapsulation complies with IP65
1.2.2 Placement
The recommended placement of the Base Station is as close to the antennas as possible to
reduce cable loss. The placement of the Base Station shall be such that it is securely
fastened to a mast or building that is able to carry the weight of the BS421 and withstand the
local environmental conditions. All cables, antennas etc. shall be properly fastened to the
mast or building using appropriate fixtures as to avoid damage to the equipment and possible
injury to persons.
1.2.3 Grounding
The BS requires careful grounding.
Grounding is important to protect the equipment when inserting/removing cables and to
protect the operator from faulty equipment.
An effective grounding is also important to protect the installation during thunderstorm
(lightning).
The grounding shall be as specified in paragraph 1.2.6 “Power connection to SB421”