Recommended separation distances between portable and mobile RF communica-
tions equipment and the ET-9090/ET-1313/ET-7070
The ET-9090/ET-1313/ET-7070 is intended for use in an electromagnetic environ-
ment in which radiated RF disturbances are controlled. The customer or the user
of the ET-9090/ET-1313/ET-7070 helps prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communica-
tions equipment (transmitters) and the ET-9090/ET-1313/ET-7070 as recommended
below, according to the maximum output power of the communications
equipment.
For transmitters rated at a maximum output power not listed above, the recom-
mended 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 manu-
facturer.
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 propaga-
tion is affected by absorption and reflection from structures, objects and
people.
Rated maximum
output power of
transmitter
w
150 kHz to 80 MHz
0.12
0.38
1.2
3.8
12
0.01
0.1
1
10
100
Separation distance according to frequency of transmitter
m
80 MHz to 800 MHz
0.12
0.38
1.2
3.8
12
800 MHz to 2.5 GHz
0.23
0.73
2.3
7.3
23
18
