Table 9: Guidance and Manufacturer's Declaration- Separation distances between
RF communications equipment and Neptune system
Recommended separation distances between portable and mobile
RF communications equipment and the Neptune system
The Neptune system is intended for use in an electromagnetic environment in which
radiated RF disturbances are controlled. The customer or the user of the Neptune
system can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communications equipment (transmitters)
and the Neptune 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: These guidelines may not apply in all situations. Electromagnetic propagation is
affected by absorption and refl ection from structures, objects and people.
48 User Guide for the Neptune™ Sound Processor
Separation distance according to
frequency of transmitter
d = 1.2√P < 800 MHz
0.12
0.38
1.2
3.8
12
(m)
d = 2.3√P ≥ 800 MHz
0.23
0.73
2.3
7.3
23