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Aespire 7900
Recommended
separation distances
Between portable and mobile
RF communications
equipment and the system
Rated maximum
output power of
transmitter
Outside ISM bands
W
D
0,01
0,1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation distance D in meters (m) can
be determined 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 to 800 MHz the separation distance for the higher frequency range applies.
Note 2: The ISM (Industrial, Scientific and Medical) bands between 150 kHz and 80 MHz are 6,765 MHz to 6,795 MHz; 13,553
MHz to 13,567 MHz; 26,957 MHz to 27,283 MHz; and 40,66 MHz to 40,70 MHz.
Note 3: An additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in the ISM
frequency bands between 150 kHz and 80 MHz and in the frequency range 80 MHz to 2,5 GHz to decrease the likelihood that
mobile/portable communications equipment could cause interference if it is inadvertently brought into patient areas.
Note 4: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection
from structures, objects, and people.
6-12
The system is intended for use in the electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the
system can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications
equipment (transmitters) and the system as recommended below, according
to the maximum power of the communications equipment.
Separation distance in meters (m) according to frequency of the transmitter
150 kHz to
150 kHz to
80 MHz
80 MHz
In ISM bands
3 5 ,
P
=
-------- -
D
=
V1
0.35
1.1
3.5
11
35
80 MHz to
800 MHz
12
D
=
P
------ -
V2
1.2
0.12
3.8
0.38
12
1.2
38
3.8
120
800 MHz to
2,5 GHz
12
23
P
D
------ -
=
------ -
E1
E1
0.23
0.73
2.3
7.3
12
23
1009-0633-000
P
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