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Guidance and manufacturer’s declaration – electromagnetic immunity
The NeXus-4 is intended for use in the electromagnetic environment specified below. The customer or the user of the
NeXus-4 should assure that it is used in such an environment.
Immunity
test
IEC 60601 test
level
Compliance
level
Electromagnetic environment - guidance
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 NeXus-4 is used exceeds the applicable RF
compliance level above, the NeXus-4 should be observed to verify normal operation. If abnormal performance is
observed, additional measures may be necessary, such as re-orienting or relocating the NeXus-4.
b
Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended separation distances between portable and mobile RF communications equipment and the
NeXus-4
The NeXus-4 is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the NeXus-4 can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the NeXus-4 as recommended below,
according to the maximum output power of the communications equipment.
Rated maximum output
power of transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
1.2√
80 MHz to 800 MHz
1.2√
800 MHz to 2.5 GHz
2.3√
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in meters (m)
can be estimated using the equation applicable to the frequency of the transmitter, where P is the maximum output power
rating of the transmitter in watts (W) according to the transmitter manufacturer.
NOTE 1 At 80 MHz and 800 MHz, the separation distance for 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.
The NeXus-4 has no essential performance.
