21 Specifications and Safety Electromagnetic Compatibility
308
Recommended Separation Distances
The HeartStart MRx is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the HeartStart MRx can help prevent
electromagnetic interference by maintaining a minimum distance between portable and mobile RF
communications equipment (transmitters) and the HeartStart MRx as recommended below, according
to the maximum output power of the communications equipment.
Table 89 Recommended Separation Distances
Separation Distance According to Frequency of Transmitter (m)
Rated Maximum Output
Power of Transmitter (W)
150 kHZ to 800 MHz 800 MHz to 2.5 GHz
0.01 0.1 m 0.2 m
0.1 0.4 m 0.7 m
1 1.2 m 2.3 m
10 4 m 7 m
100 12 m 23 m
For transmitters rated at a maximum output power not listed above, the recommended separation distance d in
meters (m) can be determined 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’s manufacturer.
At 80 MHz and 800 MHz, the higher frequency range applies.
These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and
reflection from structures, objects and people.
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