9
7EN125103 Rev. 13 • 2020
www.hillrom.com
Recommended separation distances between portable and mobile RF communications
equipment and the overhead lift
The overhead lift is intended for use in an electromagnetic environment in which radiated RF distur-
bances are controlled. The customer or the user of the overhead lift can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the overhead lift 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
P
d
2
,1
=
80 MHz to 800 MHz
800 MHz to 2.5 GHz
P
d
7
,
0
=
0.01
0,12
0,035
0,07
0.1
0,38
0,11
0,22
1
1,2
0,35
0,7
10
3,8
1,11
2,21
100
12
3,5
7,0
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.
P
d
2
,1
=
d = 0,35
