B-3
Rated Maximum
Output power of
Transmitter Watts
(W)
Separation Distance According to Frequency of Transmitter (m)
150 kHz to 80 MHz
outside ISM bands
P
V
d
1
3.5
150 kHz to 80 MHz in
ISM bands
P
V
d
2
12
80 MHz to 800 MHz
P
E
d
1
12
800 MHz to 2.5 GHz
P
E
d
1
23
0.01 0.12 0.12 0.12 0.23
0.1 0.38 0.38 0.38 0.73
1 1.20 1.20 1.20 2.30
10 3.80 3.80 3.80 7.30
100 12.00 12.00 12.00 23.00
For transmitters at a maximum output power not listed above, the recommended separation distanced 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 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 is used in calculating the recommended separation distance for transmitters in the ISM
frequency bands between 150 kHz to 80 MHz and in the frequency range 80 MHz to 2.5 GHz to decrease the likelihood that
portable/ mobile communication 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.
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