41
Recommended separation distances between portable and mobile HF communica-
tions equipment and the prisma VENT AQUA.
The prisma VENT AQUA is intended for use in an electromagnetic environment in which
HF disturbances are controlled. The customer or user of the prisma VENT AQUA can help
prevent electromagnetic interference by maintaining a minimum distance between portable
and mobile HF communications equipment (transmitters) and the prisma VENT AQUA -
depending on the output of the communication device as indicated below.
Rated capacity
of the trans-
mitter W
Separation distance depending on frequency of transmitter in 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
0.37
0.37
0.74
1
1.2
1.2
2.3
10
3.7
3.7
7.4
100
12
12
23
For the transmitters whose nominal power is not specified in the above table, the distance can
be determined using the equation for the respective column, where P is the nominal power of
the transmitter in watts (W) according to the transmitter manufacturer.
Note 1: at 80MHz or 800MHz, respectively, the separation distance of the higher frequency
range applies
Note 2: these guidelines may not always apply. The propagation of electromagnetic waves
depends on the absorption and reflection of buildings, objects and people.