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Table X-4 Recommended Separation Distances Between Portable and Mobile RF
Communications Equipment and the Equipment
The equipment is intended for use in the electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the equipment can help to prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and
the equipment as recommended in the table 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 800 MHz
800 MHz to 2.5 GHz
P
d
2
.
1
=
P
d
3
.
2
=
0.01
0.1 m
0.2 m
0.1
0.4 m
0.7 m
1
1.2 m
2.3 m
10
4.0 m
7.0 m
100
12.0 m
23.0 m
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 800 MHz, the separation distance for the higher frequency range applies.
NOTE 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
the absorption and reflection from structures, objects, and people.
