Quinton ST 55, Service Manual

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A-6 Safety Requirements Cardiac Stress Treadmills Service Manual
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Recommended Separation Distances Between Portable and Mobile RF
Communications Equipment and the Cardiac Stress Treadmills
The Cardiac Stress Treadmills are intended for use in an electromagnetic environment
in which radiated RF disturbances are controlled. The customer or the user of the
Cardiac Stress Treadmills can help prevent electromagnetic interference by
maintaining a minimum distance between portable and mobile RF communications
equipment (transmitters) and the Cardiac Stress Treadmills as recommended below,
according to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter
W
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz 80 MHz to 800 MHz 800 MHz to 2.5 GHz
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 1 At 80 MHz and 800 MHz, 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.
NOTE 3 Tests were verified with shielded input/output cables only.
d 1.2 P = d 1.2 P = d 2.3 P =