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38
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 communica-
tion equipment (transmitters) depending on the output of the communication equipment, as follows:
Maximum rated
output of the trans-
mitter 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 corresponding
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.
