P/N: 7000717 Rev A, CO-148, Released Date: 2021-01-28;
©2021, IRRAS USA, Inc., All rights reserved
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33
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Recommended separation distances between portable and mobile RF
communications equipment and the Hummingbird ICP Control Module
The Hummingbird ICP Control Module is intended for use in an electromagnetic
environment in which radiated RF disturbances are controlled. Home network devices,
mobile phones, cordless telephones and their base stations, and walkie-talkies can affect
this equipment and should be kept at least a distance d away from the equipment. The
customer or the user of the Hummingbird ICP Control Module can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and the Hummingbird ICP Control
Module as recommended below, according to the maximum output power of the
communications equipment.
Rated maximum
output power of
transmitter
Separation distance according to frequency of transmitter
(m)
150 kHz to 80 MHz
80 MHz to 800
MHz
800 MHz to 2.5
GHz
W
𝑑 = 1.2√𝑃
𝑑 = 1.2√𝑃
𝑑 = 2.3√𝑃
0.01
0.12
0.12
0.23
0.1
0.37
0.37
0.74
1
1.17
1.17
2.33
10
3.69
3.69
7.38
100
11.67
11.67
23.33
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.
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.
