Vyaire SpiroUSB Manual De Funcionamiento página 33

Radiated RF 3 V/m
IEC61000-4-3 80 MHz to
2.5 GHz
NOTE 1 At 80 MHz and 800 MHz, the higher frequency range applies.
NOTE 2 These guidelines may not apply in all situations. Electromagnetic propagation
is affected by absorption and reflection from structures, objects and people.
Field strengths from fixed transmitters, such as base stations for radio (cellular/
a
cordless) telephones and land mobile radios, amateur radio, AM and FM radio
broadcast and TV broadcast cannot be predicted theoretically with accuracy.
To assess the electromagnetic environment due to fixed RF transmitters,
an electromagnetic site survey should be considered. If the measured field
strength in the location in which the SpiroUSB is used exceeds the applicable
RF compliance level above, the SpiroUSB should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be
necessary, such as re-orientating or relocating the SpiroUSB
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than
b
3 V/m.
3 V/m d = 1.2√P
d = 2.3√P
Where P is the maximum output
power rating of the transmitter
in watts (W) according to the
transmitter manufacturer and d is the
recommended separation distance in
metres (m).
Fields strengths from fixed RF
transmitters, as determined by an
electromagnetic site survey,
less than the compliance level in each
frequency range.
Interference may occur in the vicinity
of equipment marked with the following
symbol:
33
80 MHz to 800 MHz
800 MHz to 2.5 GHz
should be
a
b