Guidance and manufacturer’s declaration – electromagnetic immunity
The system is intended for use in the electromagnetic environment specified below.
The customer or the user of the system should assure that it is used in such an environment.
Immunity test
IEC 60601 test
level
Compliance
level
Electromagnetic Environment Guidance
Conducted Radio
Frequency
IEC 61000-4-6
3 V RMS
0,15 MHz –
80 MHz
6 V RMS
in ISM bands
80 % AM at
1 kHz
3 V RMS
0,15 MHz –
80 MHz
6 V RMS
in ISM bands
80 % AM at
1 kHz
Portable and mobile RF communications equipment
should be used no closer to any part of the system,
including its cables, than the recommended separation
distance calculated from the equation applicable to the
frequency of the transmitter.
Recommended separation distance
d = 1.17√P
d = 1.17√P 80 MHz to 800 MHz
d = 2.33√P 800 MHz to 2.7 GHz
Where P is the maximum output power rating of the
transmitter in watts (W) according to the transmitter
manufacturer and d is the recommended separation
distance in metres (m).
Field strengths from fixed RF transmitters, as determined
by an electromagnetic site survey:
a) Should be less than the compliance level in each
frequency range.
b). Interference may occur in the vicinity of equipment
marked with the following symbol.
Radiated Radio
Frequency
IEC 61000-4-3
3 V/m 80 MHz to
2.7 GHz
80 % AM at
1 kHz
3 V/m
80-2700 MHz
80% AM at
1 kHz
NOTE 1:
At 80 MHz, the higher frequency range applies.
NOTE 2:
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
a) Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile
radios, amateur radio, AM and FM radio broadcast, and TV broadcast, cannot be predicted theoretically with accuracy.
To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey shall be
considered. If the measured field strength in the location in which the system is used exceeds the applicable RF
compliance level above, the system shall be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as reorienting or relocating the system.
b) Over the frequency range 150kHz to 80MHz, field strengths shall be less than 3 V/m.
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