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Recommended Separation Distances Between Portable and Mobile RF Communications
Equipment and the
VISIONELECT (model 240-030-930)
monitor System
The VISIONELECT (model 240-030-930) monitor system is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled. The user of the VISIONELECT (model
240-030-930) monitor system can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and
the VISIONELECT (model 240-030-930) monitor system as recommended below, according to the
maximum output power of the communications equipment.
Rated maximum output
power (W) of transmitter
Separation distance (m) according to frequency of transmitter
150 kHz to 80 MHz
80 MHz to 800 MHz
800 MHz to 2.5 GHz
0.01
0.12
0.12
0.23
0.1
0.37
0.37
0.74
1
1.17
1.17
2.33
10
3.70
3.70
7.37
100
11.70
11.70
23.30
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.
d
1.17 P
=
d
1.17 P
=
d
2.33 P
=
