24
Recommended separation distances between portable and mobile RF
communications equipment and the
Fetal Doppler.
The
Fetal Doppler
is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled. The
customer or the user of the
Fetal Doppler
can help prevent
electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment
(transmitters) and the
Fetal
Doppler
as recommended below,
according to the maximum output power of the communications
equipment.
Rated
maximum
output
power
of
transmitter
W
Separation distance according to frequency of
transmitter m
150 kHz to 80
MHz
80 MHz to 800
MHz
800 MHz to 2,5
GHz
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters rated at a maximum output power not listed above, the
recommended separation distance d in metres (m) can be estimated
using the equation applicable to the frequency of the transmitter, where
P is the maximum output power rating of the transmitter in watts (W)
according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
