REFA FAMILY USER MANUAL
Page
23
of
27
Recommended separation distances between portable and mobile RF communications equipment and
the Refa
The Refa is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The
customer or the user of the Refa can help prevent electromagnetic interference by maintaining a minimum distance between
portable and mobile RF communications equipment (transmitters) and the Refa 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 = 1.2√𝑃
80 MHz to 800 MHz
𝑑 = 1.2√𝑃
800 MHz to 2.5 GHz
𝑑 = 2.3√𝑃
0.01
0.12
0.12
0.23
0.1
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 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.
The Refa has no essential performance.
