Sony DXC-990P Instructions For Use Manual page 8

Recommended separation distances between portable and mobile RF
communications equipment and the DXC-990P
The DXC-990P is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the DXC-990P can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile
RF communications equipment (Transmitters) and the DXC-990P 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 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.
8
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d = 1.2 √P
0.12
0.38
1.2
3.8
12
m
80 MHz to 800 MHz
d = 1.2 √P
0.12
0.38
1.2
3.8
12
800 MHz to 2.5 GHz
d = 2.3 √P
0.23
0.73
2.3
7.3
23