Recommended separation distances
Recommended separation distances between portable and mobile RF communications equipment
and the Patient Monitor
The Patient Monitor is intended for use in the electromagnetic environment in which radiated RF disturban-
ces are controlled. The customer or the user of the Patient Monitor can help prevent electromagnetic inter-
ference by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters) and the Patient Monitor as recommended below, according to the maximum output power of
the communications equipment.
Rated maximum
output power of
transmitter (W)
0.01
0.1
1
10
100
For transmitters rated at a maximum output power not listed above, the recommended separation
distanced 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 80MHz and 800MHz, 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.
Separation distance according to frequency of transmitter (m)
150KHz to 80MHz
√P
d= 3.5
0.3500
1.1068
3.5000
11.0860
35.0000
80MHz to 800MHz
√P
d= 3.5
0.3500
1.1068
3.5000
11.0860
35.0000
800MHz to 2.5GHz
√P
d= 2.3
0.2334
0.7378
2.3334
7.3786
23.3334
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