1018100100L02 1907V005
31
Appendix
Recommended safety distance between portable and mobile HF communication devices and
the unit
The device is designed for use in the electromagnetic environments specified below, in which the HF
disturbance variables are controlled. The customer or the operator of the device can help to prevent
electromagnetic interference by maintaining the minimum distances between mobile HF communica-
tion equipment (transmitters) and the device as recommended below in accordance with the maxi-
mum output line of the communication equipment.
Rated power of the
transmitter (W)
Safety distance based on the transmission frequency (m)
150 kHz to 80 MHz
d = 1.2
⋅√
P
80 MHz to 800 MHz
d = 1.2
⋅√
P
800 MHz to 2.5 GHz
d = 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
7.3
100
12
12
23
Table 2: Recommended safety distance between portable and mobile HF communication devices
and the unit
For transmitters whose maximum rated power is not specified in the table shown above, the recom-
mended safety distance d in metres (m) can be determined from the formula that belongs to the re-
spective column where P is the maximum rated power of the transmitter in watts (W) in accordance
with the specifications of the transmitter manufacturer.
Comment 1
The higher frequency range applies for 80 MHz and 800 MHz.
Comment 2
These guidelines may not apply in all cases. The propagation of electromagnetic
waves is affected by absorption and reflection on the building, objects and peo-
ple.
EN
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