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12 | 04.10.2021 | Page 46
Recommended minimum distances between portable and
mobile RF communication devices and the RO
The RO is intended for use in electromagnetic environments in which radiated RF disturbances are
controlled. The buyer or user of the RO can help prevent electromagnetic interference by maintaining a
minimum distance between portable/mobile RF communications equipment (transmitters) and the RO as
recommended below, according to the maximum output power of the communications equipment
Max. output of the
transmitter
(W)
Minimum distance in accordance with the frequency of the
transmitter (m)
150 kHz to 80 MHz
d=1.2 √P
80 MHz to 800 MHz
d=1.2 √P
800 MHz to 2.5 GHz
d=2.3 √P
0.01 0.12 0.12 0.23
0.1 0.38 0.38 0.73
1 1.2 1.2 2.3
10 3.8 3.8 7.3
100 12 12 23
For transmitters with a maximum output not specified above, the recommended
distance d in meters (m) can be calculated in accordance with the equation appropriate
for the frequency of the transmitter, whereby P is the maximum output of the
transmitter in Watts (W) in accordance with the specifications of the manufacturer.
NOTE 1:
For 80 MHz and 800 MHz, the safety distance applies for the higher frequency range.
NOTE 2:
These guide values may not apply to all situations. Spreading of electromagnetic waves
is also influenced by absorption and reflection via buildings, items, and persons.
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