Recommended separation distances between portable
and mobile RF communications equipment and the
HearCheck Screener
The HearCheck Screener is intended for use in an electro magnetic environment
in which radiated RF disturbances are controlled. The customer or the user of the
HearCheck Screener can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment
(transmitters) and the HearCheck Screener 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
150 kHz to
80 MHz
d = 1.2 √P
80 MHz to
800 MHz
d = 1.2 √P
800 MHz to
2.5 GHz
d = 2.3 √P
0,01
Not applicable
0,12
0,23
0,1
Not applicable
0,37
0,74
1
Not applicable
1,2
2,3
10
Not applicable
3,7
7,4
100
Not applicable
12
23
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.
13
21
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