EMC Information
VentecLife.com 171
Recommended Separation Distance
Between Portable and Mobile RF
Communications Equipment and V*Home
V*Home 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)
Separation Distance According to Frequency of Transmitter (meters)
150 kHz to 80 MHz
outside ISM Bands
d = 1.2 √P
150 kHz to 80 MHz in
ISM Bands
d = 1.2 √P
80 MHz to 800 MHz
d = 0.6 √P
800 MHz to 2.5 GHz
d = 1.2 √P
0.01 0.12 0.12 0.06 0.12
0.1 0.38 0.38 0.19 0.38
1 1.2 1.2 0.6 1.2
10 3.8 3.8 1.9 3.8
100 12 12 6 12
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, scientic, 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 reection from
structures, objects, and people.
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