46
K01/03/23.12.2021
Recommended separation distances between portable and mobile RF communications equipment and the device
The device is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the device can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the device 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
(out ISM and amateur
radio bands)
𝑑 = 1.2√𝑃
150 kHz to 80 MHz
(out ISM and amateur
radio bands)
𝑑 = 0.6√𝑃
80 MHz to 800 MHz
𝑑 = 1.2√𝑃
800 MHz to 2.7 GHz
𝑑 = 2.3√𝑃
0.01
0.12
0.06
0.12
0.23
0.1
0.38
0.19
0.38
0.73
1
1.2
0.6
1.2
2.3
10
3.8
1.9
3.8
7.3
100
12
6
12
23
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 2:
The ISM (industrial, scientific and medical) bands between 0,15 MHz and 80 MHz are 6,765 MHz to
6,795 MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 40,70 MHz. The
amateur radio bands between 0,15 MHz and 80 MHz are 1,8 MHz to 2,0 MHz, 3,5 MHz to 4,0 MHz, 5,3 MHz
to 5,4 MHz, 7 MHz to 7,3 MHz, 10,1 MHz to 10,15 MHz, 14 MHz to 14,2 MHz, 18,07 MHz to 18,17 MHz,21,0 MHz to
21,4 MHz, 24,89 MHz to 24,99 MHz, 28,0 MHz to 29,7 MHz and 50,0 MHz to 54,0 MHz.
Note 3:
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures,objects and people
.
