Rated
maximum
output of
transmitter
W
0.01
0.1
1
10
100
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 rat-
ing 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. Electro-
magnetic propagation is affected by absorption and reflection from
structures, objects and people.
Recommended separation distances between RF wireless
communications equipment.
The device is intended for use in an electromagnetic environ-
ment in which radiated RF disturbances are controlled. The cus-
tomer or the user of the device can help prevent electromag-
netic interference by maintaining a minimum distance between
RF wireless communications equipment and the device as rec-
ommended below, according to the maximum output power of
the communications equipment.
Frequency
MHz
385
450
710
745
780
28
Separation distance according to freque of transmitter
150 kHz to
80 MHz
[ 3.5
√
P
d=
V
1
0.12
0.38
1.2
3.8
12
Maximum
Power
Distance
W
1.8
0.3
2
0.3
0.2
0.3
m
80 kHz to
800 MHz
d= [ 3.5
] √
P
E
1
0.12
0.38
1.2
3.8
12
IEC 60601
Test Level
27
28
9
800 MHz to
2.7 GHz
d= [ 7
] √
P
E
1
0.23
0.73
2.3
7.3
23
Compliance
Level
27
28
9