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158
Recommended Separation Distances between Portable and
Mobile RF Communications Equipment and This Device
The device is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of this device can help prevent electromagnetic interference
by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and this device as recommended below, according to the maximum output power of
the communications equipment.
Rated Maximum
Power Output of
Transmitter
(Watts)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters
(m) can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output
power of the transmitter manufacturer.
Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2: 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.
Note 3: An additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in the
ISM frequency bands between 150 kHz and 80 MHz and in the frequency range of 80 MHz and 2.5 GHz to decrease the
likelihood that mobile/portable communications equipment could cause interference if it is inadvertently brought into
patient areas.
Note 4: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
Trilogy100 clinical manual
Separation Distance According to Frequency of Transmitter
150 kHz to 80 MHz
150 kHz to 80 MHz
outside ISM Bands
d = 1.2 P
0.12
0.38
1.2
3.8
12
(meters)
80 MHz to 800 MHz
in ISM Bands
d = 1.2 P
d = 1.2 P
0.12
0.38
1.2
3.8
12
800 MHz to 2.5 GHz
d = 2.3 P
0.12
0.23
0.38
0.73
1.2
2.3
3.8
7.3
12
23
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