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Domus 4/English
Conducted RF
3Vrms150 kHz to
IEC 61000-4-6
80
ISM bands
Radiated RF
3 V/m 80 MHz to
IEC 61000-4-3
2.5 GHz
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) 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) The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in the
frequency range 80 MHz to 2.5 GHz are intended to decrease the likelihood that
mobile/portable communications equipment could cause interference if it is inadvertently
brought into patient areas. For this reason, an additional factor of 10/3 is used in calculating
the recommended separation distance for transmitters in these frequency ranges.
c) 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.
d) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
3 Vrms
MHz
outside
a
3 V/m
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 meters
b
(m).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site survey
c
, should be less than the compliance level in
each frequency range
Interference may occur in the vicinity of
equipment
marked
following symbol:
17
d
.
with
the
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