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Recommended separation distances between portable and mobile RF communications equipment
and the Model Smart Alert
™
The Model Smart Alert remote is intended for use in an electromagnetic environment in which radiated RF Disturbances are controlled.
The customer or the user of the Model Smart Alert System can help prevent electromagnetic interference by maintaining a minimum distance
between portable and mobile RF communications equipment (transmitters) and the Model Smart Alert System 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 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 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.
System
Separation Distance according to frequency of transmitter
d = 1.2 √P
150 kHz to 80 MHz
0.12
0.38
1.2
3.8
12
m
d = 1.2 √P
80 MHz to 800 MHz
0.12
0.38
1.2
3.8
12
d = 1.2 √P
800 MHz to 2.5 GHz
0.23
0.73
2.3
7.3
23
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