B-5
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:
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 0,15 MHz 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. The amateur radio bands between 0,15 MHz and 80 MHz are
1,8 MHz to 2,0 MHz, 3,5 MHz to 4,0 MHz, 5,3 MHz to 5,4 MHz, 7 MHz to 7,3 MHz, 10,1
MHz to 10,15 MHz, 14 MHz to 14,2 MHz, 18,07 MHz to 18,17 MHz, 21,0 MHz to 21,4
MHz, 24,89 MHz to 24,99 MHz, 28,0 MHz to 29,7 MHz and 50,0 MHz to 54,0 MHz.
b The compliance levels in the ISM frequency bands between 150 kHz and 80 MHz and in
the frequency range 80 MHz to 2,7 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 has
been incorporated into the formulae 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 whichThe
model Dynamic ECG recorder is used exceeds the applicable RF compliance level above,
