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Recommended separation distances between portable and mobile RF communications
equipment and the
SunTech 247
device
The
SunTech 247
device is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the
SunTech 247
device
can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the
SunTech 247
device 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
d
= [3.5/V1] √
P
80 MHz to 800 MHz
d
= [3.5/V1] √
P
800MHz to 2.5GHz
d
= [7/E1] √
P
0.01
0.12
0.12
0.23
0.10
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 1At 80 MHz and 800 MHz, the separation distance for the higher frequency range
applies.
NOTE 2These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and reflection from structures, objects, and people.
69


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