Typical Interference on Ultrasonic Imaging Systems
Imaging Mode ESD
1
RF
2
Power Line
3
2D or 3D Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
For sector imaging
transducers, white radial
bands or flashes in the
center lines of the image.
For linear imaging
transducers, white vertical
bands, sometimes more
pronounced on the sides of
the image.
White dots, dashes, or
diagonal lines near the
center of the image.
Color Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Color flashes, radial or
vertical bands, increase in
background noise, or
changes in image color.
Color flashes, dots, dashes,
or changes in the color
noise level.
Doppler Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Horizontal lines in the
spectral display or tones,
abnormal noise in the
audio, or both.
Vertical lines in the spectral
display, "popping" noise in
the audio, or both.
M-mode Change of operating mode,
system settings, or system
reset. Brief flashes in the
displayed or recorded
image.
Increase in the image
background noise or white
M-mode lines.
White dots, dashes,
diagonal lines, or increase
in image background noise.
1. Electrostatic discharge (ESD) caused by discharging of electric charge buildup on insulated
surfaces or persons.
2. Radio frequency (RF) energy from RF transmitting equipment such as portable phones,
handheld radios, wireless devices, commercial radio and TV stations, 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.
Safety
Electromagnetic Compatibility
78 EPIQ 7 User Manual 4535 617 25341
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