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Working clearances
Recommended working clearances between portable and mobile HF communication devices and the UNIT
UNIT
The
is intended for operation in an electromagnetic environment, where radiated HF interference is checked. The customer
UNIT
or the user of the
can help prevent electromagnetic interference by duly observing the minimum distances between portable
and/or mobile HF communication devices (transmitters) and the
the relevant communication device as specified above.
Nominal transmitter output
[W]
0,01
0,1
1
10
100
For transmitters whose maximum nominal output is not specified in the above table, the recommended working clearance d in
meters (m) can be determined using the equation in the corresponding column, where P is the maximum nominal output of the
transmitter in watts (W) specified by the transmitter manufacturer.
Annotation 1
The higher frequency range applies at 80 MHz and 800 MHz.
Annotation 2
These guidelines may not be applicable in all cases. The propagation of electromagnetic waves is influenced by their absorption
and reflection by buildings, objects and persons.
Working clearance according to transmission frequency [m]
150kHz to 80MHz
[
1 2 ,
] P
d
=
0,12
0,38
1,2
3,8
12
UNIT
. These values may vary according to the output power of
80MHz to 800MHz
[
1 2 ,
] P
d
=
0,12
0,38
1,2
3,8
12
800MHz to 2.5GHz
[
2 3 ,
] P
d
=
0,23
0,73
2,3
7,3
23
25
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