NEC iPASOLINK EX Advanced Instruction Manual page 13

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SAFETY GUIDELINE FOR USING HAZARDOUS MICROWAVE
RADIATION
The radiation levels of Microwave and Millimeter-Wave that iPASOLINK series deal
with are very low, and no health hazard has been reported for them so far. However,
advanced countries that care much about health hazard have started regulating the
radiation levels. For EU countries, it is specified by EN 62311 Annex A A.2. In order
to follow the regulation, operators should not work near the antenna if its transmitter
is activating. Especially, the radiation level of a specific area (
illustration below) in front of antenna is high.
See the following illustration and Calculation Examples 1 and 2:
Power density in front of the antenna turns high along the antenna beam. Ensure not
to allow yourself radiated by beams anytime.
Calculation Example 1
SAFETY DISTANCE: X m
The power density and field strength level can be obtained by the following
calculation formula:
GGS-000544-01E
SAFETY GUIDELINE FOR USING HAZARDOUS MICROWAVE RADIATION
Radiation Hazard Area
–90 to +90
degrees
Power Density : S =
Where
P = Output Power (W),
P' = Output Power (dBm),
G = Antenna Gain (dBi),
(in condition of angle and range from antenna)
R = Distance between human being and antenna (m)
X
Y
10
P
2
(W/m ) =
2
4R
iPASOLINK EX Advanced: S
and shown in the
X Y
ANTENNA
iPASOLINK EX/A
Calculation Example 2
SAFETY DISTANCE: Y m
 
P' + G – 30
 
10
(mW/cm
2
40R
AFETY
2
)
I
NFORMATION