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Immunity interference
tests
Radiated HF interference
IEC 61000-4-3
a.
The higher frequency range applies at 80MHz and 800MHz.
b.
The field strength of stationary transmitters such as the base stations of radio telephones and land mobile services, amateur
radio stations as well as AM and FM radio and television broadcasting stations cannot be accurately predetermined. An
investigation of the location is recommended to determine the electromagnetic environment resulting from stationary HF
transmitters. If the field strength measured at the UNIT location exceeds the conformance level specified above, the UNIT
must be observed with respect to its normal operation at each application site. If unusual performance characteristics are
observed, it may be necessary to take additional measures such as reorientation or repositioning of the UNIT.
c.
A frequency range of 150kHz to 80MHz results in a field strength of less than 3V/m.
24
IEC 60601-1-2 test level
3V/m
a
80MHz to 800MHz
3V/m
a
800MHz to 2.5GHz
Conformance level
3V
eff
3V
eff
Electromagnetic environment guide-
lines
[
1 2 ,
] P
d
=
at 80MHz to 800MHz
[
2 3 ,
] P
d
=
at 800MHz to 2.5GHz
where
P
is the nominal transmitter out-
put in watts (W) specified by the trans-
d
mitter manufacturer and
recommended working clearance in
meters (m).
The field strength of stationary radio
transmitters is based on a local investi-
b
gation for all frequencies
conformance level for all frequencies
Interference is possible in the vicinity of
equipment bearing the following graphic
symbol.
is the
less than the
c
.
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