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5. Recommended separation distances between portable and mobile RF
communications equipment and the device
The device is intended for use in the electromagnetic environment in which the RF disturbances are con-
trolled. 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 a
function of the output power of the communication device, as shown below.
Nominal power of
transmitter [W]
Separation distanced [m] according to frequency of transmitter
150kHz to< 80 MHz
d = 1.2 P
80 MHz to< 800 MHz
d = 1.2 P
800 MHz to 2.5 GHz
d = 2.3 P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended separation dis-
tance
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.
