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Safety
Electrical safety
The power cable connections must meet International Electrotechnical Commission
(IEC) safety standards.
Always power down and unplug the equipment before servicing.
When using alternative DC supplies, such as battery-backed DC power source, the
supply must be SELV rated.
Primary disconnect device
The power supply must include a primary disconnect device with appropriate
fusing.
External cables
Safety may be compromised if outdoor rated cables are not used for connections
that will be exposed to the weather.
RF exposure near the antenna
Strong radio frequency (RF) fields will be present close to the antenna when the
transmitter is on. Always mute the transmitter before undertaking maintenance
activities in front of the antenna.
Minimum separation distances
Ensure that people cannot stand or walk in front of the antenna within ± 10
degrees of the antenna axis and within the minimum distances listed in
(ETSI) or
calculated using worst-case assumptions. Reduced separation distances may be
appropriate under some circumstances. Further details are provided in
hazard assessment
Thermal safety
The CMU may be hot to the touch when in operation. The CMU must not be
operated in ambient temperatures exceeding 40 deg C unless mounted in a
Restricted Access Location. For more information, see
temperature for the CMU
ii
Table 4-93
(FCC). The minimum distances in these tables have been
on page 4-67.
on page 5-70.
Table 4-92
Radiation
Maximum operating ambient
phn-1478_005v000
Apr 2010
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