EMC
Technical documentation (EMC) | 385
Recommended separation distance between portable and
mobile RF communications equipment and Basic 30
Basic 30 is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of Basic 30 can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and Basic 30 as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum
output power
of transmitter
Separation distance according to frequency of transmitter
W 150 kHz to 80 MHz
d = 0.35 √ P
80 MHz to 800 MHz
d = 0.35 √ P
800 MHz to 2.5 GHz
d = 0.7 √ P
0.01 0.04 0.04 0.07
0.1 0.11 0.11 0.22
1 0.35 0.35 0.70
10 1.11 1.11 2.21
100 3.50 3.50 7.00
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 separation distance for the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
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