Annex 2. Electromagnetic Emissions and Immunity
39
Recommended separation distances between portable and mobile RF
communications equipment and the system
The system 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,
P (W)
Separation distance according to frequency of
transmitter, d (m)
P
d
17
.
1
150 kHz up to
80 MHz
outside ISM bands
P
d
17
.
1
80 MHz to
800 MHz
P
d
23
.
2
800 MHz to
2.5 GHz
0.01
0.117
0.117
0.233
0.1
0.369
0.369
0.738
1
1.167
1.167
2.333
10
3.689
3.689
7.379
100
11.667
11.667
23.333
Notes:
1. At 80 MHz and 800 MHz, the separation distance for the higher frequency
range applies.
2. These guidelines may not apply in all situations. Electromagnetic
propagation is affected by absorption and reflection from structures, objects
and people.
3. For transmitters rated at a maximum output power not listed above, the
recommended separation distance
d
in meters (m) can be determined using
the equation applicable to the frequency of the transmitter, where
Р
is the
maximum output power rating of the transmitter in watts (W) according to the
transmitter manufacturer.
