3 Electromagnetic compatibility
Sirona Dental Systems GmbH
Installation Requirements C8
+
60 28 000 D3417
54
D3417.021.04.09.02
båÖäáëÜ
Recommended working clearances between
portable and mobile HF communication devices
and the UNIT
The
UNIT
is intended for operation in an electromagnetic
environment, where radiated HF interference is checked.
The customer or the user of the
UNIT
can help prevent
electromagnetic interference by duly observing the mini-
mum distances between portable and/or mobile HF com-
munication devices (transmitters) and the
UNIT
. These
values may vary according to the output power of the rele-
vant communication device as specified above.
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 max-
imum nominal output of the transmitter in watts (W) speci-
fied 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.
3.4 Working clearances
Nominal transmitter output
[W]
Working clearance according to transmission frequency [m]
150kHz to 80MHz
80MHz to 800MHz
800MHz to 2.5GHz
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
d
1 2
,
[
]
P
=
d
1 2
,
[
]
P
=
d
2 3
,
[
]
P
=
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