3
Recommended separation distances between portable and mobile
RF communication equipment and the system
The device is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the
system can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications
equipment (transmitters) and the system 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 = 1.2 P
80 MHz to
800 MHz
d = 1.2 √P
800 MHz to 2.5GHz
d = 2.3 P
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the
recommended separation distance d in metres (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 separation distance for the higher
frequency range applies.
Note : these guidelines may not apply in all situations. Electromagnetic
propagation is affected by absorption and reflection from structures, objects
and people.
0.1m
0.4m
.m
3.7m
.7m
0.1m
0.4m
.m
3.7m
.7m
0.2m
0.7m
.3m
7.4m
3.3m
Appendix
