47
Conduceted RF
IEC 61000-4-6
3 V
rms
26 kHz
to 80 MHz
3 V
rms
d=1.2√P
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz
to 1 GHz
3 V/m
d=1.2√P 80 MHz to 800 MHz
d=2.3√P 800 MHz to 2.5 GHz
where P is the maximum output power
rating of the transmitter in Watt (W)
according to the transmitter manufacturer
and d is the recommended separation
distance
in
meters
(m).
Field strengths from fixed RF transmitters,
as determined by an electromagnetic site
survey (a), should be less than the
compliance level (b) in each frequency
range.
Interference may occur in the vicinity of
equipment marked with the symbol
described lateral:
Note 1:
At 80 MHz and 800MHz, 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, people and animals.
(a) 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 product is used exceeds the applicable RF compliance
level above, the product should be observed, additional measures may be necessary, such as
reorienting or relocating the product.
(b) Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
RF – frequency of EM radiation section, which frequency is between the low range of radio
frequencies of long waves and the infrared range; useful for radio transmission. Limit frequencies
are 9 kHz and 3 000 GHz.
CAUTION! Portable devices for wireless communication may
affect operation of THE ELECTRONIC MEDICAL DEVICES.
