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interruptions
40% UT (60%
and voltage
dip in UT) for 0,5
variations on
cycle
power supply
input lines
70% UT (30%
IEC 61000-4-11
dip in UT) for 25
cycle
<5 % UT (>95
% dip in UT) for
5 sec
Power frequency
3A/m
(50/60Hz) mag-
netic field
IEC 6100-4-8
3 V/m
Radiated RF
80 MHz to 2500
IEC 61000-4-3
MHz
Conducted RF
3 Vrms
IEC 61000-4-6
150 kHz to 80
MHz
0,5 cycle
user of the (equipment or system) re-
quires continued operation during power
40% UT (60% dip in
mains interruptions that the (equipment
UT) for 0,5 cycle
or system) be powered from an uninter-
ruptible power supply or a battery.
70% UT (30% dip in
UT) for 25 cycle
3A/m
Power frequency magnetic fields should
be at levels characteristic of a typical loca-
tion in a typical commercial or hospital
environment.
3 V/m
Portable and mobile RF communications
80 MHz to 2500
equipment should be used no closer to
MHz
any part of the (equipment or system),
including cables, then the recommended
separation distance calculated from the
3 Vrms
equation applicable to the frequency of
150 kHz to 80 MHz
the transmitter.
Recommended separation distance
d=(3.5/V1)√P
d=(3.5/E1)√P 80 MHz to 800 MHz
d=(7/V1)√P 800 MHz to 2,5 GHz
Where P is the maximum output power
rating of the transmitter in wats (W) ac-
cording to the transmitter manufacturer
and d is the recommended separation
distance in meters (m).
Field strenght from fixed RF transmitters,
as determined by an electromagnetic site
survey, a should be less thsn the compli-
ance level in each frequency range.b
Interference may occur in the vicinity of
equipment marked with the following
symbol:
21
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