Radiated RF
IEC 61000-4-
3
3 V/m
80 MHz to
2.5 GHz
3 V/m
Portable and mobile RF communications equipment
should be used no closer to any part of the device,
including cables, than the recommended separation
distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
P
E
d
1
5
.
3
80 MHz to 800 MHz
P
E
d
1
7
800 MHz to 2.5 GHz
Where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended separation
distance in metres (m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey, a should
be less than the compliance level in each frequency
range.b
Interference may occur in the vicinity of equipment
marked
with the following symbol:
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures, objects and people.
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless)
telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot
be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength in the
location in which the device is used exceeds the applicable RF compliance level above, the device should
be observed to verify normal operation. If abnormal performance is observed, additional measures may
be necessary, such as reorienting or relocating the device.
Recommended separation distances between portable and mobile
RF communications equipment and the EQUIPMENT or SYSTEM –
for EQUIPMENT or SYSTEM that are not LIFE-SUPPORTING
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)
80 MHz to 800 MHz
P
E
d
1
5
.
3
800 MHz to 2.5 GHz
P
E
d
1
7
0.01
0.12
0.23
0.1
0.37
0.74
1
1.17
2.33
10
3.69
7.38
100
11.67
23.33