Chapter
2
Safety
Electromagnetic emissions and electromagnetic compatibility
LM 2000 - 06.05.2021 - 09382-03
15
Recommended safety distances between portable, mobile and fixed HF
telecommunication equipment and the LM 2000
The LM 2000 system is is intended for operation in an
electromagnetic environment in which radiated HF
interference is controlled. The customer or user of the
LM 2000 system can help to prevent electromagnetic
interference by observing the minimum distances
between portable and mobile HF communications
equipment (transmitters) and the LM 2000 system, as
recommended below in accordance with the
maximum output performance of the communications
equipment.
Table 5: Protective distance depending on the transmitter frequency
Rated power of
the transmitter
[W]
Protective distance depending on the transmitter frequency [m]
150
kHz − 80
MHz
80
MHz − 800
MHz
800
MHz − 2.5
GHz
d = 1.2 √P
d = 1.2 √P
d = 2.3 √P
0.01
0.02
0.03
0.06
0.1
0.06
0.09
0.19
1
0.18
0.3
0.6
10
0.57
0.5
1.9
100
1.8
3.0
6.0
For transmitters whose power rating in the above table is not given, the distance can be
determined in metres using the equivalence, which belongs to each column, whereby P is the
power rating in watts [W] in accordance with the instructions of the transmitter manufacturer.
NOTE 1:
At 80 MHz and 800 MHz, the higher value applies.
NOTE 2:
These guidelines may not be applicable in every situation. The distribution of
electromagnetic waves is influenced by absorption and reflections from buildings,
objects and human beings.