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APPENDIX II
a
Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM
radio broadcast and TV broadcast cannot be predicted theoretically with accuracy. To assess the electromagnetic environment due to fixed RF
transmitters, an electromagnetic site survey should be considered. If the measured field strength in the location in which the monitors are used exceeds
the applicable RF compliance level above, the monitor should be observed to verify normal operation. If abnormal performance is observed, additional
measures may necessary, such as reorienting or relocating the Monitor.
b
Over the frequency range 150kHz to 80 MHz, field strengths should be less than 3 V/m.
Portable and mobile RF communications equipment and the Monitor.
The patient care monitors are intended for use in the electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the Monitor can help prevent electromagnetic
interference by maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the 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
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.
Recommended separation distances between
Separation distance according to frequency of transmitter
150 kHz to 80 MHz
d
= 1.17
P
0.12
0.37
1.17
3.70
11.7
Appendix II-4
m
80 MHz to 800 MHz
d
= 1.17
P
0.12
0.37
1.17
3.70
11.7
User Manual
800 MHz to 2.5 GHz
d
= 2.33
P
0.23
0.74
2.33
7.37
23.3
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