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This equipment is intended for use in the electromagnetic environment specified below. The customer or the user of the
equipment should assure that it is used in such an environment.
Immunity test
IEC 60601 test level
Compliance
level
Electromagnetic environment
— guidance
Portable and mobile RF
communications equipment should be
used no closer to any part of the,
including cables, than the
recommended separation distance
calculated from the equation
applicable to the frequency of the
transmitter as below.
Recommended separation distance
Conducted RF
rf coupled into
lines
150 kHz to 80 MHz
outside ISM bands
3 Vrms
d=1.2/V1]√P
(IEC 61000-4-6)
radiated rf
80 MHz — 2.5 GHz
3 V/m
c1=1.2/
√
P 80 MHz to 800 MHz
(IEC 61000-4-3)
d=2.3√P 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:
a.
The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6,765 MHz to 6,795
MHz; 13,553 MHz to 13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 40,70 MHz.
b.
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 equipment is used exceeds the applicable RF compliance level above, the
equipment should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as reorienting or relocating the equipment.
