1 - 18 HS70A Service Manual
▐Avoiding Electromagnetic Interference
Typical interference on ultrasound imaging systems varies depending on electromagnetic
phenomena. Please refer to the following table:
Imaging Mode ESD
1
RF
2
Power Line
3
2D Change of operating
mode, system settings,
or system reset.
Brief flashes in the
displayed or recorded
image.
For sector imaging
probes, white radial
bands or flashes in the
centerlines of the image.
For linear imaging
probes, white vertical
bands, sometimes more
pronounced on the sides
of the image.
White dots, dashes,
diagonal lines, or diagonal
lines near the center of the
image.
M Increase in the image
background noise or
white M mode lines.
White dots, dashes,
diagonal lines, or increase
in image background
noise.
Color Color flashes, radial or
vertical bands, increase
in background noise, or
changes in color image.
Color flashes, dots,
dashes, or changes in the
color noise level.
Doppler Horizontal lines in the
spectral display or tones,
abnormal noise in the
audio, or both.
Vertical lines in the
spectral display, popping
type noises in the audio, or
both.
1. ESD caused by discharging of electric charge build-up on insulated surfaces or persons.
2. RF energy from RF transmitting equipment such as portable phones, hand-held radios, wireless
devices, commercial radio and TV, and so on.
3. Conducted interference on power lines or connected cables caused by other equipment, such as
switching power supplies, electrical controls, and natural phenomena such as lightning.
A medical device can either generate or receive electromagnetic interference. The EMC
standards describe tests for both emitted and received interference.
Samsung Medison ultrasound systems do not generate interference in excess of the
referenced standards.
The Ultrasound System is designed to receive signals at radio frequency and is therefore
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