USER
MANUAL
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51331-006
Recommended separation distance between portable and mobile RF communications equipment
and the Photic Stimulator.
IEC 60601-1-2 / EN 60601-1-2
The Photic Stimulator is intended for use in the electromagnetic environment in which radiated RF disturbances
are controlled. The customer or the user of the Photic Stimulator can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and
the Photic Stimulator as recommended below, according to the maximum output power of the communications
equipment.
If any electromagnetic interference is encountered, the patient and equipment should move to an area without
interference.
Rated maximum output
power of transmitter
Separation distance according to frequency of transmitter
W
150 kHz to 80 MHz
d = 1.17
√
P
80 MHz to 800 MHz
d = 1.17
√
P
800 MHz to 2.5 GHz
d = 2.33
√
P
0.01
0.12
0.12
0.23
0.1
0.38
0.38
0.73
1
1.2
1.2
2.3
10
3.8
3.8
7.3
100
12
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.
NOTE: At 80 MHz and 800 MHz, the separation distance for the higher frequency range applies.
NOTE: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption
and reflection from structures, objects and people.
Appendix 3
