164
Recommended Separation Distances between Portable and Mobile RF Communications Equipment and This Device
The device is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of this device can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and this device as recommended below, according to the maximum output power of the communications equipment.
Rated Maximum | Separation Distance According to Frequency of Transmitter | |||||||||||
Power Output of |
|
|
|
|
| (meters) |
|
|
|
|
| |
Transmitter | 150 kHz to 80 MHz | 150 kHz to 80 MHz | 80 MHz to 800 MHz | 800 MHz to 2.5 GHz | ||||||||
(Watts) | outside ISM Bands | in ISM Bands | d = | 1.2 | P | d = | 2.3 | P | ||||
| d = | 1.2 | P | d = | 1.2 | P |
|
|
|
|
|
|
0.01 |
| 0.12 |
|
| 0.12 |
|
| 0.12 |
|
| 0.23 |
|
0.1 |
| 0.38 |
|
| 0.38 |
|
| 0.38 |
|
| 0.73 |
|
1 |
| 1.2 |
|
| 1.2 |
|
| 1.2 |
|
| 2.3 |
|
10 |
| 3.8 |
|
| 3.8 |
|
| 3.8 |
|
| 7.3 |
|
100 |
| 12 |
|
| 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 of the transmitter manufacturer.
Note 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Note 2: The ISM (industrial, scientific and medical) bands between 150 kHz and 80 MHz are 6.765 MHz to 6.795 MHz; 13.553 MHz to 13.567 MHz; 26.957 MHz to 27.283 MHz; and 40.66 MHz to 40.70 MHz.
Note 3: An additional factor of 10/3 is used in calculating the recommended separation distance for transmitters in the ISM frequency bands between 150 kHz and 80 MHz and in the frequency range of 80 MHz and 2.5 GHz to decrease the likelihood that mobile/portable communications equipment could cause interference if it is inadvertently brought into patient areas.
Note 4: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from structures, objects and people.
