44
Recommended safety distances between portable and mobile RF devices
and the Lady-Comp® device
The Lady-Comp devices are intended for use in the electromagnetic environment specified below.
The customer or the user of the Lady-Comp device can prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF devices (transmitters) and the
Lady-Comp depending on the output of the other RF device, such as specified below.
For transmitters not specified in the above table, the distance can be determined using the equation
based on the transmitter, where P is the power rating of the transmitter in watts (W) according to the
transmitter manufacturer.
150 kHz to 80 MHz,
d = 1.2√P
80 MHz to 800 MHz,
d = 0.35√P
800 MHz to 2.5 GHz,
d = 0.7√P
0.01
0.1
1
10
100
0.12
0.38
1.20
3.79
12.00
0.04
0.11
0.35
1.11
3.50
0.07
0.22
0.70
2.21
7.00
“W”-rating
transmitters
Minimum distance depends on transmission frequency “M”
Comment 1
For calculating the recommended minimum dis-
tance of transmitters in the frequency range
from 80MHz to 2.5 GHz, an additional factor of
10/3 was used to reduce the likelihood that a
mobile/portable RF device inadvertently brought
into patient areas could result in a malfunction.
Comment 2
These guidelines may not apply in all cases.
Electromagnetic propagation is affected by
absorption and reflection from structures,
objects, and people.
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