GE MEDICAL SYSTEMS
D
IRECTION 2392751-100, REVISION 3VIVID™ 4 SERVICE MANUAL
Chapter 2 - Pre-Installation 2-5
2-2-6 EMI Limitations
Ultrasound machines are susceptible to Electromagnetic Interference (EMI) from radio frequencies,
magnetic fields, and transients in the air or wiring. They also generate EMI. The Vivid™ 4 ultrasound
unit complies with limits as stated on the EMC label. However, there is no guarantee that interference
will not occur in a particular installation.
Note: Possible EMI sources should be identified before the unit is installed, and should not be on the
same line as the ultrasound system. A dedicated line should be used for the ultrasound system.
Electrical and electronic equipment may produce EMI unintentionally as the result of a defect. Sources
of EMI include the following:
• Medical lasers.
• Scanners.
• Cauterizing guns.
•Computers.
•Monitors.
•Fans.
• Gel warmers.
• Microwave ovens.
• Portable phones.
• Broadcast stations and mobile broadcasting machines.
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