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Recommended separation distances between portable and mobile RF
communications equipment and the Transcutaneous Electrical Nerve
Stimulator.
The Transcutaneous Electrical Nerve Stimulator is intended for use in an
electromagnetic environment in which radiated RF disturbances are controlled.
The buyer or user of the Transcutaneous Electrical Nerve Stimulator can help
prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and
the Transcutaneous Electrical Nerve Stimulator as recommended below,
according to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter (W)
0.01
0.1
1
10
100
For rated maximum output power of transmitter that's not listed in the above chart,
the recommended isolation distance d (unit is meter) can be determined by equa-
tion in the corresponding transmitter frequency column. P is the maximum output
rated power of transmitter provided by its manufacturer, the unit is watt (W).
NOTE 1 When under 80MHz and 800MHz, use equation of higher frequency.
NOTE 2 These guidelines couldn't possibly fit all situations.
Electromagnetic transmission is affected by buildings, objects, the
absorption and reflection of human body.
Separation distance according to frequency of
transmitter
150 KHz to
80 MHz
d
=
1
2 ,
P
0.12
0.38
1.2
3.8
12
(m)
80 MHz to
800 MHz
1
2 ,
d
=
P
0.12
0.38
1.2
3.8
12
800 MHz to
2.5 GHz
d
=
2
3 ,
P
0.23
0.73
2.3
10
23
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