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8. EMC Related Notifications
Guidance and manufacturer's declaration – electromagnetic emissions
The Duet control unit is intended for use in the electromagnetic environment specified below. The
customer or the user of the Duet control unit should assure that it is used in such an environment.
Emissions test
RF emissions
CISPR 11
RF emissions
CISPR 11
Harmonic emissions
IEC 61000-3-2
Voltage fluctuations/
flicker emissions
IEC 61000-3-3
Recommended separation distances between portable and mobile RF
communications equipment and the Duet control unit
The Duet control unit is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Duet control unit can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the Duet control unit as recommended below,
according to the maximum output power of the communications equipment.
Rated
maximum
output power of
transmitter
W
0,01
0,1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation
distance d in metres (m) can be estimated using the equation applicable to the frequency of the
transmitter, where P is the maximum output power rating of the transmitter in watts (W) according
to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
Compliance
Group 1
Class B
Class A
Complies
Separation distance according to frequency of transmitter
150 kHz to 80
MHz
d = 1,2
0,12
0,38
1,2
3,8
12
Electromagnetic environment – guidance
The Duet control unit 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.
The Duet control unit 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.
m
80 MHz to 800 MHz
d = 1,2
0,12
0,38
1,2
3,8
12
11
800 MHz to 2,5 GHz
d = 2,3
0,23
0,73
2,3
7,3
23
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