Atmos C 21 - Page 43

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12.4 Recommended separations between portable and mobile RF Communications
equipment and the ATMOS C 21 / C 31
NOTE 1 By 80 MHz and 800 MHz the higher frequency range applies.
NOTE 2
Theseguidelinesmightnotbeapplicableinanycase.Theemanationofelectromagneticwavesisa󰀨ectedbyabsorptionand
reectionofbuildings,objectsandpeople.
The ATMOS C 21 / C 31 is intended for use in electromagnetic environment in which radiated disturbances are controlled. The
customer or user of the ATMOS C 21 / C 31 can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF Communications equipment and the ATMOS C 21 / C 31 as recommended below, according to
the maximum output power of the communications equipment.
Safety distance, depending on transmit-frequency m
Nominal output of the
transmitter
W
150 kHz to 80 MHz
d = [ 3.5 / 3] √P
80 MHz to 800 MHz
d = [ 3.5 / 3] √P
800 MHz to 2.5 GHz
d = [ 7.0 / 3] √P
0.01 0.12 0.12 0.24
0.1 0.37 0.37 0.74
1 1.2 1.2 2.4
10 3.69 3.69 7.38
100 11.66 11.66 23.32
For transmitters for which the maximum nominal output is not indicated in the above table, the recommended safety distance
d in meters (m) can be determined using the equation belonging to the respective column whereas P is the maximum nominal
outputofthetransmitterinwatts(W)acc.tomanufacturer´sspecication.
NOTE 1 By 80 MHz and 800 MHz the higher frequency range applies.
NOTE 2
Theseguidelinesmightnotbeapplicableinanycase.Theemanationofelectromagneticwavesisa󰀨ectedbyabsorptionand
reectionofbuildings,objectsandpeople.
a
Theeldstrengthofstationarytransmitters,suchasbasestationsofcellularphonesandmobileterrainradioequipment,
amateur radio transmitters, cbm broadcast and TV stations cannot be predestined exactly. To determine the electromagnetic
environmentinregardtostationarytransmitters,astudyofthelocationistobeconsidered.Ifthemeasuredeldstrength
at the location where the ATMOS C 21 / C 31 is used exceeds the above compliance level, the ATMOS C 21 / C 31 is to
be observed to verify the intended use. If abnormal performance characteristics are noted, additional measures might be
necessary, e. g. a changed arrangement or another location for the ATMOS C 21 / C 31.
b
Withinthefrequencyrangeof150kHzto80MHztheeldstrengthshouldbebelow3V/m.
12.0 Notes on EMC