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a. 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, 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. 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
Fetal Doppler
is used exceeds the applicable RF
compliance level above, the
Fetal Doppler
should be observed to
verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as re-orienting or
relocating the
Fetal Doppler
.
b Over the frequency range 150 kHz to 80 MHz, field strengths should
be less than 3 V/m.
