Opera Classic - Page 45

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Conducted RF
interferences
according to
IEC 61000-4-6
Emitted RF
interferences
according to
IEC 61000-4-3
3 V eff
150 kHz-80
MHz
3 V/m
80 MHz-
2.5 GHz
3 V eff
3 V/m
Portable and mobile radios,
including cables, should not be
used closer to the care bed than the
recommended working clearance
that is calculated by the equation for
the appropriate frequency
Where P is the Power of the
transmitter in Watts (W) according
to specications of the transmitter
manufacturer and D is the
recommended working clearance in
meters
Field strengths from xed
RF transmitters should, at all
frequencies, accordng to a site
survey, a-Note p.5 be lower than the
level of agreement be b- Note.p.5.
In the vincinity of equipment, bearing
the following symbol, interference
Note 1: At 80 and 800 MHz, the higher frequency range must be taken
Note 2: These guidelines may not apply in all situations. The propagation of
electromagnetic waves is affected by absorption and reection from structures,
objects and persons
a) Field strengths from xed transmitters, such as base stations of mobile telephones
and land mobile radios, amateur radio, AM, FM radio and TV broadcast can not be
predicted theortically with accuracy. To assess the electromagnetic environment
due to xed RF transmitters, an electromgnetic site survey is recommended. If the
eld strength at the location of the care bed exceeds the specied compliance level
above then the care bed should be monitored with respect to its normal operation. If
abnormal performance is observed, it may be necessary to take additional measures,
such as reorienting or relocating the care bed
b) Over the frequency range 150 kHz to 80 MHz, eld strengths should be less than 3
V/m
8. Technical Specications