Full Digital Ultrasonic Diagnostic Instruments
User’s Manual V1.00
- 41 -
Table 4 - Recommended separation distance between portable and mobile RF communications
equipment and this equipment
This equipment is intended for use in an electromagnetic environment in which radiated RF
disturbances are controlled. The customer or the user of the equipment can help prevent
electromagnetic interference by maintaining a minimum distance between portable and
mobile RF communications equipment (transmitters) and this equipment as recommended
below, according to the maximum output power of the communications equipment.
Rated maximum
output power of
transmitter (W)
150KHz to 80MHz
d
＝
3.5
√P
80MHz to 800MHz
d
＝
1.75
√P
800MHz to 2.5GHz
d
＝
2.33
√P
0.01
0.35
0.12
0.23
0.1
1.11
0.37
0.74
1
3.50
1.17
2.33
10
11.07
3.69
7.38
100
35.00
11.67
23.33
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 watt (W) according
to the transmitter manufacturer.
Note1: At 80MHz and 800MHz, the separation distance for the higher frequency range applies.
Note2: These guidelines may not apply in all situations. Electromagnetic propagation is affected by
absorption and reflection from structures objects and people.
Statement:
When performing common mode conducted RF disturbance test (IEC61000-4-6), trivial
radiation stripes may appear on the screen when 1V disturbing voltage is added. That
disturbance does not affect the diagnosis.