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Recommended separation distances between portable and
mobile RF communications equipment
The GSI 39 is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the GSI 39 can help prevent electromagnetic
interferences by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the GSI 39 as recommended below, according to the maximum output
power of the communications equipment.
Rated Maximum output
power of transmitter [W]
Separation distance according to frequency of transmitter [m]
150 kHz to 80 MHz
d
= 1.17
√𝑷
80 MHz to 800
MHz
d
= 1.17
√𝑷
800 MHz to 2.5
GHz
d
= 2.23
√𝑷
0.01
0.12
0.12
0.22
0.1
0.37
0.37
0.705
1
1.17
1.17
2.23
10
3.70
3.70
7.05
100
11.70
11.70
22.30
For transmitters rated at a maximum output power not listed above, the recommended separation
distance
d
in meters (m) can be estimated using the equation applicable to the frequency of the
transmitter, where
P
is the maximum output power rating of the transmitter in watts (W) according to
the transmitter manufacturer.
Note 1
At 80 MHz and 800 MHZ, the higher frequency range applies.
Note 2
These guidelines may not apply to all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
