NEC iPASOLINK EX Advanced, Instruction Manual

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- 12 - SAFETY GUIDELINE FOR USING HAZARDOUS MICROWAVE RADIATION
GGS-000544-01E iPASOLINK EX Advanced: S
AFETY
I
NFORMATION
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 (
X
and
Y
shown in the
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.
Radiation Hazard Area
The power density and field strength level can be obtained by the following
calculation formula:
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)
iPASOLINK EX/A
ANTENNA
–90 to +90
degrees
Calculation Example 1
Calculation Example 2
X
SAFETY DISTANCE: X m
SAFETY DISTANCE: Y m
Y
Power Density : S =
P
’
+ G – 30
10




10
40

R
2
( W / m
2
) =
4

R
2
( mW / cm
2
)
P