53
Electromagnetic compatibility
Note: Distances for transmitters whose
maximum rated power is not specied in
the table above can be determined using
the equation for the relevant column, with
P being the transmitter’s maximum rated
power in watts (W) according to manufac
-
turer specications.
Note: These guidelines may not be appli
-
cable in all cases. Electromagnetic propa-
gation is aected by the absorptive and
reective qualities of the surrounding
structures, objects and people.
The compliance levels for ISM frequency
bands between 150kHz and 80MHz and
in the 80MHz to 6GHz frequency range
are designed to minimise the likelihood of
mobile/portable communications equip
-
ment causing interference if accidentally
brought into the patient area. Therefore,
theadditional factor 10/3 has been included
in the formula and used when calculating
the recommended safe distances in these
frequency ranges.
Transmitter
rated power
in W
Safe distance according to transmitter frequency m
150 kHz to 80 MHz ¹
1.2√P
80 MHz to 800 MHz
1.2√P
800 MHz to 6 GHz ¹
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 7.27
100 12 12 23
¹ The higher frequency range applies with 80MHz and 800MHz.