Safety
4-28 Versana Essential – User Guide
5759238-100 English
Rev. 2
Minimum distances
Recommended separation distances between portable and mobile RF communications
equipment and the ultrasound unit
The ultrasound unit is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the ultrasound unit can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the ultrasound unit as recommended below, according to the
maximum output power of the communications equipment. Portable and mobile radio communications
equipment (e.g. two-way radio, cellular/cordless telephones and similar equipment) should be used no
closer to any part of this system, including cables, than determined according to the following method:
Separation distance according to frequency of transmitter
m
Rated maximum output
of transmitter
W
150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2.7 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.
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