EN-79
Guidance and Manufacturer’s Declaration: Electromagnetic Emissions
SDC3 is intended for use in the electromagnetic environment specied below� The customer or the user of SDC3 should ensure
that it is used in such an environment�
Emissions test Compliance Electromagnetic Environment - guidance
RF emissions CISPR 11 Group 1
SDC3 uses RF energy only for its internal function;
therefore, its RF emissions are very low and are not
likely to cause any interference in nearby electronic
equipment�
RF emissions CISPR 11 Class B SDC3 is suitable for use in all establishments, including
domestic establishments and those directly connected
to the public low-voltage power supply network that
supplies buildings used for domestic purposes, provided
the following warning is heeded:
Warning: This system may cause radio interference
or may disrupt the operation of nearby equipment� It
may be necessary to take mitigating measures such as
reorienting or relocating the system or shielding the
location�
Harmonic emissions IEC61000-3-2 Class A
Voltage Fluctuations/ icker
emissions IEC61000-3-3
Complies
Guidance and Manufacturer’s Declaration--Electromagnetic Immunity
The SDC3 system is intended for use in the electromagnetic environment specied below� The user of the SDC3 system should
ensure that it is used in such an environment�
Immunity Test IEC 60601 Test Level Compliance Level Electromagnetic Environment--Guidance
Portable and mobile RF communications equipment should
be used no closer to any part of the SDC3 system, including
its cables, than the recommended separation distance
calculated from the equation applicable to the frequency of
the transmitter�
Conducted RF
IEC 61000-4-6
3 Vrms
150 kHz to 80 MHz
3 V
Recommended Separation Distance:
d = 1�17√P
Radiated RF
IEC 61000-4-3
3 V/m
80 MHz to 2�5 GHz
3 V/m d = 1�17√P 80 MHz to 800 MHz
d = 2�33√P 800 MHz to 2�5 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 meters (m)�
Field strengths from xed RF transmitters, as determined by
an electromagnetic site survey (a), should be less that the
compliance level in each frequency range (b)�
Interference may occur in the vicinity of equipment marked
with the following symbol:
NOTE 1: At 80 MHz and 800 MHz, the higher frequency range applies�
NOTE 2: These guidelines may not apply in all situations� Electromagnetic propagation is aected by absorption and reection
from structures, objects, and people�
(a) Field strengths from xed 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 xed RF transmitters, an electromagnetic site survey should be considered� If the
measured eld strength in the location in which the SDC3 system is used exceeds the applicable RF compliance level above,
the SDC3 system should be observed to verify normal operation� If abnormal performance is observed, additional measures
may be necessary, such as reorienting or relocating the SDC3 unit�
(b) Over the frequency range 150 kHz to 80 Mhz, eld strengths should be less than 3 V/m�
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