8
The device is intended for operation in an electromagnetic environment with controlled RF dis-
turbances. Electromagnetic interference can be avoided by observing the distances to mobile HF
telecommunication devices (transmitters) specified below to prevent performance degradations.
These minimum distances depend on the output power of the communication device but must not
be closer than 30cm between portable HF telecommunication devices and any point of the unit or
its cables.
Interference emission mea-
surements
Matching
Electromagnetic environment - Guidelines
HF emissions according to
CISPR 11
Group 1
The device uses HF energy exclusively for its internal
function. Therefore, its HF emission is very low and
it is unlikely to interfere with adjacent electronic
devices.
HF emissions according to
CISPR 11
Class B
tested for both environmental conditions (IEC 60601-
1-2/5.2.1.1)
Emissions of harmonics accor-
ding to IEC 61000-3-2
Class D
The device is suitable for use in facilities other than
residential and those directly connected to the public
utility network, which also supplies buildings used for
residential purposes.
Voltage fluctuation/flicker
emissions according to IEC
61000-3-3
complies
Nominal power of the
transmitter in W
Protective distance, depending on the
transmitting frequency in m
150 kHz to <80 MHz
80 MHz to <800 MHz
800 MHz to 2.7 GHz
0.01
0.12
0.12
0.23
0.1
0.37
0.37
0.74
1
1.17
1.17
2.33
10
3.69
3.69
7.38
100
11.67
11.67
23.33
For transmitters whose maximum rated power is not specified in the above table, the recommen-
ded protective distance (d) in meters (m) can be determined using the equation associated with
the respective column, where:
• P is the maximum rated power of the transmitter in watts (W) as specified by the transmitter
manufacturer;
• U1 is the maximum permissible field strength according to IEC 61000-4-6 (3V RMS outside the
ISM bands, 6V RMS in the ISM and amateur radio bands);
• E1 is the maximum permissible field strength according to IEC 61000-4-3.
Note:
These guidelines may not be applicable in all cases. The propagation of electromagnetic quantities
are affected by absorption and reflection of the buildings, objects and people.
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