24
25
Table 4 Guidance and manufacture’s declaration – electromagnetic immunity
–for ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
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.
a Field strengths from fixed transmitters, such as base stations for radio
(cellular/cordless) telephones and land mobile radios, amateur radio, AM
Guidance and manufacture’s declaration – electromagnetic immunity
Immunity Test
IEC 60601
Test Level
Conducted RF
IEC 61000-4-6
3 Vrms 150 kHz
to 80 MHz
3 Vrms
3 V/m
80 MHz to 800 MHz
800 MHz to 2.5 GHz
Portable and mobile RF communications
equipment should be used no closer to any
part of the BS901, including cables, than the
recommended separation distance calculated
from the equation applicable to the frequency of
the transmitter.
Recommended separation distance
d = 1.167
d = 1.167
d = 2.333
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.
Interference may occur in the vicinity of
equipment marked with the following symbol:
3 V/m 80MHz to
2.5 GHz
Radiated RF
IEC 61000-4-3
Compliance
Level
Electromagnetic environment - guidance
The BS901 is intended for use in the electromagnetic environment specified below. The
customer or the user of the BS901 should assure that it is used in such an environment.
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 BS901 is used exceeds
the applicable RF compliance level above, the BS901 should be observed
to verify normal operation. If abnormal performance is observed, additional
measures may be necessary, such as reorienting or relocating the BS901.
b Over the frequency range 150 kHz to 80 MHz, field strengths should be less
than 3 V/m.
Table 6 – Recommended separation distances between portable and mobile
RF communications equipment and the ME EQUIPMENT or ME SYSTEM –
for ME EQUIPMENT and ME SYSTEMS that are not LIFE-SUPPORTING
0.01
N/A
N/A
N/A
N/A
N/A
0.117
0.369
1.167
3.690
11.67
0.233
0.738
2.333
7.377
23.33
0.1
1
10
150 kHz to 80 MHz
d = 1.167
80 MHz to 800 MHz
d = 1.167
800 MHz to 2.5 GHz
d = 2.333
Recommended separation distances between
portable and mobile RF communications equipment at the BS901
The BS901 is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the BS901 can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the BS901 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)
100
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.
