
19. Technical Data
19-8 HomeChoice APD Systems Patient At-Home Guide October 2, 2009 07-19-61-244
Table 19-4. Recommended separation distance between portable and mobile RF
communications equipment and the HomeChoice APD System – for equipment
and systems that are not
life-supporting
The HomeChoice/HomeChoice PRO APD System is intended for use in an electromagnetic environment in which radiated
RF disturbances are controlled. The user of the system can help prevent electromagnetic interference by maintaining a
minimum distance between portable and mobile RF communications equipment (transmitters) and the system 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
d = [3.5 / 3]
80 MHz to 800 MHz
d = [3.5 / 3]
800 MHz to 2.5 GHz
d = [7 / 3]
0.01 0.12 0.12 0.23
0.1 0.37 0.37 0.74
1 1.20 1.20 2.30
10 3.70 3.70 7.40
100 12.00 12.00 23.00
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.
NOTES:
• At 80 MHz and 800 MHz, the higher frequency 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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