43
d =0.35
P
d=d=1.2
P
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
watts (W) according to the
transmitter manufacturer and d is
the recommended separation
distance in metres (m)
b
.
Field strengths from fixed RF
transmitters, as determined by an
electromagnetic
site
surveyc,
should
be less than the compliance level
in
each frequency range
d
.
Interference may occur in the
vicinity
of device 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 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 and 2.5 GHz are
intended to decrease the likelihood that mobile/portable communications device could cause interference
if it is inadvertently brought
into patient areas. For this reason, an individual factor of 10/3 is used in calculating the recommended
separation distance for transmitters in
these frequency ranges.
c Field strength 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
