Zimmer emFieldPro, Инструкция по эксплуатации, Страница: 44 / 48

Manufacturer´s EMC declaration 18
Page 34
a
The field strength of stationary transmitters such as base stations for portable
telephones and mobile land radios, wireless keyboard stations, AM and FM radios and
televisions cannot be accurately theoretically predetermined. To determine the electromagnetic
environment with regards to the stationary transmitters, a study of the electromagnetic
phenomena of the location should be considered. If the measured field strength at the location
in which the emField Pro device will be used exceeds the compliance level, the Cryo 6 device
should be observed to verify proper functionality. If unusual performance characteristics are
observed, additional measures may be required, e.g. modified layout or a different location for
the emField Pro device.
b
Above the frequency range from 150 kHz to 80 MHz, the field strength should be less
than 3 V/m.
Recommended safety distances between portable and mobile HF telecommunications devices
and the
emField device
The emField Pro device is intended for operation in an electromagnetic environment in which
the HF interference variables are controlled. The emField Pro device customer or user can help
avoid electromagnetic interference by maintaining a minimum distance between portable and
mobile HF telecommunications devices (transmitters) and the emField Pro device, depending
on the output capacity of the communications device, as specified below.
Nominal output of the transmitter
W
Safety distance based on the transmitter frequency
m
150 kHz to 80 MHz
d= 1,17 √P 80 MHz to 800
MHz
d= 1.17 √P 800 MHz to 2.5
GHz
d= 2.33 √P
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1.17 1.17 2.33
10 3.70 3.70 7.37
100 11.67 11.67 23.33
For transmitters with a maximum nominal output not indicated in the table above, the
recommended safety distance d in meters (m) can be determined using the equation in the
respective column, where P is the maximum nominal output of the transmitter in watt (W) in
accordance with the specification from the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz the higher frequency range applies.
NOTE 2 These guidelines may not be applicable in all cases. The expansion of electromagnetic
variables is influenced by absorptions and reflections in the building, objects and people.