User's Manual

68
ambient conditions as specified.
Immunity tests
Test level to
EN 60601
Level of
Compliance
Electromagnetic environment -
guidelines
In the event that there are portable and
mobile RF communication appliances
operating in the vicinity of the Trumpet,
and the relative cables, be sure to
maintain at least the recommended
separation distance, calculated on the
basis of the equation pertinent to the
transmitter frequency.
Recommended separation distance
Conducted RF
IEC 61000-4-6
3 Vrms
From150
kHz
to 80 Mhz
3 Vrms
d= 1.2
P
Radiated RF
IEC 61000-4-3
3 V/m
From 80
Mhz
to 2.5 Ghz
3 V/m
d= 1.2
P
from 80 MHz to 800MHz
d= 2.3
P
from 800 MHz to 2.5 GHz
where P is the nominal maximum power
output from the transmitter, expressed in
watts (W) and indicated by the maker of
the transmitter, and d is the
recommended separation distance,
expressed in metres (m).
The field strengths of fixed RF
transmitters, established by way of an
electromagnetic survey on site, a) must
be lower than the level of compliance
within each range of frequencies, b) may
be associated with instances of
interference near appliances bearing the
symbol indicated below
Note 1: At 80 MHz and at 800 MHz, the higher frequency range is applied.
Note 2: These indications may not be valid in all situations. Electromagnetic propagation is
affected by absorption and reflection on encountering structures, objects and persons.
a) It is not possible to make a theoretical prediction with absolute certainty as to the field
strengths of fixed transmitters, such as base radio stations (cell/cordless), terrestrial mobile
telephones and radio, ham radio, AM and FM radio or TV transmissions. To evaluate the
electromagnetic environment created by fixed RF transmitters, it may be necessary to conduct
an electromagnetic survey on site. If the field strength measured at the point where the Trumpet
is in use exceeds the applicable RF level of compliance indicated above, check the operation of
the instrument closely, to ensure that its performance levels meet the required standards. If
abnormalities are observed, then additional measures may be necessary, such as changing the