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Recommended separation distances between portable and
mobile RF communications equipment and the ERK 7800
The ERK 7800 is intended for use in an electromagnetic environment in which radiated RF disturbances are
controlled. The customer or the user of the ERK 7800 can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment (transmitters) and the ERK 7800
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
150kHz to 80MHz
d=1.2 root(P)
80MHz to 800MHz
d=1.2 root(P)
800MHz to 2,5GHz
d=2.3 root(P)
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.79
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 metres (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 80MHz and 800MHz, 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.
