Guidance and Manufacturer’s Declaration 15-5
TABLE 4
RECOMMENDED SEPARATION DISTANCES BETWEEN PORTABLE AND MOBILE RF
COMMUNICATION DEVICE AND SYSTEM
The system is intended for use in an electromagnetic environment in which radiated RF
disturbance are controlled. The customer or the user of system can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communication equipment (transmitters) and system as recommended below,
according to the maximum output power of the communication equipment.
Rated Maximum
Output power of
Transmitter
(W)
Separation Distance According to Frequency of Transmitter
(m)
150kHz -80MHz
P
d
⎥⎦
⎤
⎢⎣
⎡
=
1
5
.
3
80MHz-800MHz
P
d
⎥⎦
⎤
⎢⎣
⎡
=
3
5
.
3
800MHz-2.5GHz
P
d
⎥⎦
⎤
⎢⎣
⎡
=
3
7
0.01
0.35 0.12 0.23
0.1
1.11 0.37 0.74
1
3.50 1.17 2.34
10
11.07 3.69 7.38
100
35.00 11.67 23.34
For transmitters at a maximum output power not listed above, the recommended separation
distanced in meters (m) can be determined 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.
If system image distortion occurs, it may be necessary to position system further from sources
of conducted RF noise or to install external power source filter to minimize RF noise to an
acceptable level.
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.
