RECOMMENDED SEPARATION DISTANCES BETWEEN
PORTABLE AND MOBILE RF COMMUNICATIONS EqUIPMENT
AND THE SYMMETRY Iq 4000 SERIES
The Symmetry IQ 4000 Series is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the SYMMETRY IQ 4000 SERIES can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the Symmetry IQ 4000 Series as recommended below, according to the maximum
output power of the communications equipment.
Rated maximum output power
of transmitter
W
Separation distance according to frequency of transmitter
m
150kHz to
80MHz
d = 1.2 √P
80MHz to
800MHz
d = 1.2 √P
800MHz to 2.5GHz
d = 2.3 √P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
12
23
For transmitters rated at a maximum output power not listed above, the recommended separation distance 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.
