biodex ECONO Operation Manual page 24

Recommended separation distances between portable and mobile RF communications equipment and the Ultrasound
Table.
The Ultrasound Table is intended for use in the electromagnetic environment in which radiated RF disturbance are controlled.
The customer or the user of the Ultrasound Table can help prevent electromagnetic interference by maintaining a minimum
distance between portable and mobile RF communication equipment (transmitters) and the Ultrasound Table as
recommended below, according to the maximum output power of the communication 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 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 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.
Operating Temperature
Do not expose the equipment to a temperature change of more than 5° F (3° C) per hour.
Limits of low and high operating temperature ranges are 59° to 86° F (15° C to 30° C).
Recommended Separation Distances
Separation distance according to frequency of transmitter [m]
150 kHz to 80 MHz
d = 1.2! P
0.12
0.38
1.2
3.8
12
14
80 MHz to 800 MHz
d = 1.2! P
0.12
0.38
1.2
3.8
12
800 MHz to 2.5 GHz
d = 2.3! P
0.23
0.73
2.3
7.3
23