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Conduc
ted RF
IEC
61000-4-
6
Radiated
RF
IEC
61000-4-
3
NOTE 1 At 80 MHz and 800 MHz, the higher fre
quency range applies.
NOTE 2 These guidelines may not apply in all situa
tions. 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) telepho
nes 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 mea
sures may be necessary, such as re-orienting or re
locating the device.
(b) Over the frequency range 150 kHz to 80 MHz,
field strengths should be less than 3V/m.
Recommended separation distances
between portable and mobile RF com
munications equipment and the ME
equipment or ME system – for ME
equipment and ME systems that are
not life supporting
Recommended separation distances between por
table and mobile RF communications equipment
and the device.
The device is intended for use in an electromagne
tic environment in which radiated RF disturbances
are controlled. The customer or the user of the devi
ce can help prevent electromagnetic interference
by maintaining a minimum distance between porta
ble and mobile RF communications equipment
(transmittters) and the device as recommended be
low, according to the maximum output power of
the communications equipment.
Rated ma
ximum out
put power
of transmit
ter (W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power
not listed above, the recommended separation di
stance d in metres (m) can be estimated using the
equation applicable to the frequency of the tran
smitter, where P is the maximum output power ra
ting of the transmitter in watts (W) according to the
transmitter manufacturer.
NOTE 1 At 80MHz and 800MHz, the separation di
stance for the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situa
tions. Electromagnetic propagation is affected by
absorption and reflection from structures, objects
and people.
3
3
Vrms
Vrms
150
kHz
to
80
MHz
3
3
V/m
V/m
80
MHz
to
2.5
GHz
Separation distance according to
frequency of transmitter (m)
150 kHz to
80 MHz
Ö
d = 1.167
P
0.117
0.369
1.167
3.690
11.67
Portable and mobile
RF communications
equipment should be
used no closer to any
part of the device, in
cluding cables, than
the recommended se
paration distance calcu
lated from the equa
tion applicable to the
frequency of the tran
smitter.
Recommended separa
tion distance:
ÖP
d = 1.167
ÖP
d = 1.167
2.5 GHz
ÖP
d = 2.333
to 2.5 GHz
P
where
is the maxi
mum output power ra
ting of the transmitter
in watts (W) according
to the transmitter ma
nufacturer and
recommended separa
tion distance in metres
(m).
Field strengths from fi
xed RF transmitters, as
determined by an elec
tromagnetic site survey
(a), should be less than
the compliance level in
each frequency range
(b).
Interference may occur
in the vicinity of equip
ment marked with the
following symbol:
80 MHz
800 MHz
to 800
to 2.5 GHz
MHz
d = 1.167
Ö
d = 1.167
P
P
0.117
0.233
0.369
0.738
1.167
2.333
3.690
7.378
11.67
23.33
80 MHz to
800 MHz
d
is the
Ö
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