Table 204
Guidance and manufacturer’s declaration – electromagnetic immunity
The AES-U181 is intended for use in the electromagnetic environment specified below.
The customer or the user of the AES-U181 should assure that it is used in such an environment.
Immunity
test
IEC 60601
test level
Compliance
level
Electromagnetic environment –guidance
Conducted
RF
IEC 61000-
4-6
Radiated
RF
IEC 61000-
4-3
3 Vrms
150 kHz to
80 MHz
3 V/m
80 MHz to
2,5 GHz
Not
applicable
3 V/m
Portable and mobile RF communications equipment
should be used no closer to any part of the AES-U181,
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 80 MHz to 800 MHz
d=2,3
√
p 800 MHz to 2,5 GHz
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 meters (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 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/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 AES-U181 is used exceeds the
applicable RF compliance level above, the AES-U181 should be observed to verify normal
operation. If abnormal performance is observed, additional measures may be necessary, such
as reorienting or relocating the AES-U181.
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
