ResMed VPAP III ST-A User Manual page 51

Recommended separation distances between portable and mobile RF communications
equipment and the VPAP III ST-A
The VPAP III ST-A is intended for use in an environment in which radiated RF disturbances are controlled.
The customer or the user of the VPAP III ST-A can help prevent electromagnetic interference by maintaining
a minimum distance between portable and mobile RF communications equipment (transmitters) and the
VPAP III ST-A 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 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
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.
Separation distance according to frequency of transmitter
m
150 kHz to 80 MHz
d = 1.17 √P
0.17
0.37
1.17
3.69
11.70
80 MHz to 800 MHz
d = 0.35 √P
0.04
0.11
0.35
1.11
3.50
800 MHz to 2.5 GHz
d = 0.7 √P
0.07
0.22
0.7
2.21
7 .0
System Specifications 43