maximum
output power
of transmitter
W
150 kHz to 80
MHz outside ISM
Bands
d =
P
V1
12
150 kHz to 80
MHz in ISM bands
d =
P
V2
12
80Mhz to 800MHz
d =
P
E1
12
800MHz to 2.5GHz
d =
P
E1
23
0.01
0.12
0.12
0.12
0.23
0.1
0.38
0.38
0.38
0.73
1
1.2
1.2
1.2
2.3
10
3.8
3.8
3.8
7.3
100
12
12
12
23
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 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 150 kHz 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.
NOTE 3 An additional factor of 10/3 has been incorporated into the formulae used in calculating the
recommended separation distance for transmitters in the ISM frequency bands between 150 kHz and 80
MHz and in the frequency range 80 MHz to 2,5 GHz to decrease the likelihood that mobile/portable
communications equipment could cause interference if it is inadvertently brought into patient areas.
NOTE 4 These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.