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EN-60 EN-61
Technical information Technical information
E E
Table 4 Recommended separation distances between portable and mobile RF communi-
cations 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
150 kHz to 80 MHz
d = 3.5√P
80 MHz to 800 MHz
d=1.2√P
800 MHz to 2.7 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 recommend-
ed 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 rating of the
transmitter in watts (W) according to the transmitter manufacturer.
NOTE1: At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
Table 5 Guidance and manufacturer’s declaration - electromagnetic immunity
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 should assure that it
is used in such an environment.
Radiated RF IEC 61000-4-3 – Test specifications for enclosure port immunity to RF wire-
less communications equipment
Test fre-
quency
MHz
Band
a
MHz
Service
a
Modulation
b
Maximum
output
W
Dis-
tance
m
Immunity
test level
V/m
385
380 to
390
TETRA 400
Pulse modula-
tion b
18 Hz
1.8 0.3 27
450
430 to
470
GMRS 460,
FRS 460
FM c
± 5 kHz deviation
1 kHz sine
2 0.3 28
710
704 to
787
LTE Band 13, 17
Pulse modula-
tion b
217 Hz
0.2 0.3 9 745
780
810
800 to
960
GSM 800/900,
TETRA 800,
iDEN 820,
CDMA 850,
LTE Band 5
Pulse modula-
tion
b
18 Hz
2 0.3 28 870
930
1720
1700
to
1990
GSM 1800;
CDMA 1900;
GSM 1900;
DECT;
LTE Band 1, 3, 4, 25; UMTS
Pulse modula-
tion
b
217 Hz
2 0.3 28 1845
1970
2450
2400
to
2570
Bluetooth,
WLAN 802.11 b/g/n,
RFID 2450
LTE Band 7
Puls modulation
b
217 Hz
2 0.3 28
5240
5100
to
5800
WLAN 802.11 a/n
Pulse modula-
tion b
217 Hz
0.2 0.3 9
5500
5785
NOTE: If necessary to achieve the immunity test level, the distance between the trans-
mitting antenna and the ME equipment or ME system may be reduced to 1 m. The 1 m
distance is permitted by IEC 61000-4-3.
a For some services, only the uplink frequencies are included.
b
The carrier shall be modulated using a 50 % duty cycle square wave signal.
c As an alternative to FM modulation, 50 % pulse modulation at 18 Hz may be used be-
cause while it does not represent actual modulation, it would be worst case.
The manufacturer should consider reducing the minimum separation distance, based on
risk management and using higher immunity test levels that are appropriate for the re-
duced minimum separation distance. Minimum separation distance for higher immunity
test levels shall be calculated using the following equation:
where P is the maximum output power in W, d is the minimum separation distance in m
and E is the immunity test level in V/m.
E= 6d P
Radiated
RF IEC
61000-
4-3
10 V/m, 80
% AM at 1
kHz
10 V/m, 80
% AM at 1
kHz
d=1.2√P 80 MHz to 800 MHz
d=2.3√P 800 MHz to 2.7 GHz
where P is the maximum output power rating
of the transmitter in watts (W) according to the
transmitter manufacturer and d is the recom-
mended separation distance in metres (m) b.
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey a,
should be less th
an
the compliance level in each
frequency range b .
Interference may occur in the vicinity of equip-
ment marked with the following symbol:
NOTE1: At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE2: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects and people.
a: Field strength from fixed transmitters, such as base stations for radio (cellular/cord-
less) telephones and land mobile radios, amateur radio, AM and FM radio stations and TV
stations cannot be predicted theoretically with accuracy. To assess the electromagnetic
environment due to fixed RF transmitters, an electromagnetic site survey should be con-
sidered. 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.
b: Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.