33
Recommended separation
distance
d=1.2√P
d=1.2√P , 80MHz to 800MHz
d=2.3√P , 800MHz to 2.5GHz
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 (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:
Conducted RF
lEC 61000-4-6
Radiated RF
lEC 61000-4-3
3 V/m
80 MHz to
2.5 GHz
3 V/m
Not applicable
NOTE I At 80 MHz ends 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 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, should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating
the device.
