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11.0 Notes on EMC
NOTE 1
With 80 MHz and 800 MHz the higher frequency range applies.
NOTE 2
These guidelines might not be applicable in any case. The propagation of electromagnetic sizes is
infl uenced by absorptions and refl ections of buildings, objects and people.
a
The fi 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 fi eld strength at the location where the ATMOS Variotherm plus
is used exceeds the above compliance level, the ATMOS Variotherm plus 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 device.
b
Within the frequency range of 150 kHz to 80 MHz the fi eld strength is to be below 3 V/m.
11.4 Recommended separations between portable and mobile RF Communications
equipment and the ATMOS Variotherm plus
The ATMOS Variotherm plus is intended for use in electromagnetic environment in which radiated disturbances
are controlled. The customer or user of the ATMOS Variotherm plus can help prevent electromagnetic interfe-
rence by maintaining a minimum distance between portable and mobile RF Communications equipment and
the ATMOS Variotherm plus as stated below, according to the maximum output power of the communications
equipment.
Nominal output of the
transmitter
W
0.01
0.1
1
10
100
For transmitters for which the maximum nominal output isn´t indicated in the above table, the recommended sepa-
ration 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 specifi cation.
NOTE 1 With 80 MHz and 800 MHz the higher frequency range applies.
NOTE 2 These guidelines are not applicable in any case. The propagation of electromagnetic sizes is
infl uenced by absorptions and refl ections of buildings, objects and people.
64
Separation distance, depending on transmit-frequency m
150 kHz bis 80 MHz
d = [ 3,5 / 3] √P
0.12
0.37
1.2
3.69
11.66
80 MHz bis 800 MHz
d = [ 3,5 / 3] √P
0.12
0.37
1.2
3.69
11.66
800 MHz bis 2,5 GHz
d = [ 7,0 / 3] √P
0.24
0.74
2.4
7.38
23.32
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