Info 1: At 80 MHz and 800 MHz, the higher frequency range applies.
Info 2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by absorption and reflection from struc- tures, objects and people.
a:Field strengths from fixed transmitters, such as base stations for radio (cellular/cordless) telephones and land mobile radios, amateur radio, AM and FM radio broadcast and TV broadcast cannot be predicted theoreti- cally with accuracy. To assess the electromagnetic environment due to fixed RF transmitters, an electromagnetic site survey should be consid- ered. If the measured field strength in the location in which the Grafco Ultrasound Pocket Doppler is used exceeds the applicable RF compli- ance level above, the Grafco Ultrasound Pocket Doppler should be ob- served to verify normal operation. If abnormal performance is observed, additional measures may be necessary, such as reorienting or relocating the Grafco Ultrasound Pocket Doppler.
b:Over the frequency range 150 kHz to 80 MHz, field strengths should be less than 3 V/m.
Recommended Separation Distances
Recommended separation distances between portable and mobile RF communications equipment and the Grafco Ultrasound Pocket Doppler
The Grafco Ultrasound Pocket Doppler is intended for use in an electromagnetic environment in which radiated RF disturbances are controlled. The customer or the user of the device can help prevent electromagnetic interference by maintaining a minimum distance between portable and mobile RF communications equipment (transmitters) and the Grafco Ultrasound Pocket Doppler as recommended below, according to the maximum output power of the communications equipment.
Rated | Separation distance according to | ||
maximum | frequency of transmitter (m) | ||
output power |
|
| |
80 MHz to 800 MHz | 800 MHz to 2.5 GHz | ||
of transmitter | |||
|
| ||
(W) |
|
| |
|
|
| |
0.01 | 0.1167 | 0.2334 | |
|
|
| |
0.1 | 0.3689 | 0.7378 | |
|
|
| |
1 | 1.1667 | 2.3334 | |
10 | 3.6893 | 7.3786 | |
|
|
| |
100 | 11.6667 | 23.3334 | |