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Recommended separation distance between portable and mobile RF
communications equipment and the Medical RO-40A Pulse Oximeter
The RO-40A Pulse Oximeter is intended for use in an electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the Medical RO-40A PULSE OXIMETER can help to prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications equipment
(transmitters), and the RO-40A Pulse Oximeter 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 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.
Separation distance according to frequency of transmitter (m)
150 kHz
to 80 MHz
/
/
/
/
/
80 MHz
to 800 MHz
0.02
0.06
0.18
0.57
1.8
800 MHz
to 2.5 GHz
0.03
0.11
0.35
1.1
3.5
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