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Recommended distances between portable and mobile HF communication equipment and the device or system
The device or system is suitable for use in the electromagnetic environment described. The purchaser and/or user of the device or
system can avoid electromagnetic interference by adhering to the minimum distance between portable and mobile HF communication
equipment (transmitters) depending on the output of the communication equipment, as follows:
Maximum rated out-
put of the transmitter
in Watt
Distance / m
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2,5 GHz
d = 1,17√P
d = 0,35√P
d = 0,70√P
0,01
0,12
0,04
0,07
0,1
0,37
0,11
0,22
1
1,17
0,35
0,70
10
3,70
1,11
2,21
100
11,70
3,50
7,00
For transmitters the rated output of which is not listed above, the distance can be estimated using the equation in the corre-
sponding column, with P representing the maximum rated output of the transmitter in Watt (W) according to the information
provided by the manufacturer of the transmitter.
NOTE 1:
At 80 MHz and 800 MHz the higher frequency range is to be used.
NOTE 2:
These guidelines may not apply to all situations. Electromagnetic radiation is influenced by absorption and
reflection from buildings, objects and persons.
