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D-0116493-B (OM015) – PC850 Operating Manual
Guidance and manufacturer’s declaration – electromagnetic immunity (2)
The PC850 Audiometer is intended for use in the electromagnetic environment specified below. The customer
or user of the PC850 Audiometer should assure that it is used in such an environment.
Electromagnetic environment – guidance
Conducted RF
IEC 61000-4-6
Radiated RF
IEC 61000-4-3
10 Vrms
150kHz to 80MHz
10 V/m
80MHz to 2.7GHz
10 Vrms
150kHz to 80MHz
10 V/m
80MHz to 2.7GHz
Portable and mobile RF communications
equipment should be used no closer to any
part of the PC850 Audiometer, including
cables, than the recommended separation
distance calculated from the equation
applicable to the frequency of the transmitter.
Recommended separation distance
d = 1.2√P
d = 1.2√P 80MHz to 800MHz
d = 2.3√P 800MHz to 2.7GHz
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).
Field strengths from fixed RF transmitters, as
determined by an electromagnetic site
survey,
a
should be less than the compliance
level in each frequency range.
b
Interference may occur in the vicinity of
equipment marked with the following symbol:
NOTE 1 At 80MHz and 800MHz, 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.
a Field strengths from fixed transmitters, such as base stations for radio (cellular/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 PC850 Audiometer is used exceeds the applicable RF compliance level above, the PC850
Audiometer should be observed to verify normal operation. If abnormal performance is observed,
additional measures may be necessary, such as re-orienting or relocating the PC850 Audiometer.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
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