Recommended separation distances between portable and mobile RF communications equipment
and Planmeca Viso X-ray unit
The Planmeca Viso X-ray unit is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the Planmeca Viso X-ray unit
can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the Planmeca Viso X-ray
unit 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
d = 1,2 √P
80 MHz to 800 MHz
d = 1,2 √P
800 MHz to 2.5 GHz
d = 2,3 √P
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 meters (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.
1 General and technical data
Technical manual Planmeca Viso 31
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