Noise Picked Up From The Air; Noise Received Via The External Cables - GE LOGIQ E9 Service Manual

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5180483-100, R

Noise Picked up from the Air

Electromagnetic Interference (EMI) from radio frequencies, magnetic fields, and transients in the air.

If picked up by a probe cable, the noise will be coherent -"penlight noise" pointing down in the picture-

due to the fact that the noise is received on all channels)

Is it a problem on one probe only?

Try another probe.

Is it a problem on one of the probe connectors only?

Move the scanner to another location and verify any changes.

Electromagnetic Interference (EMI) from radio frequencies, magnetic fields, and transients in the wiring.

The noise can enter the system via the mains power cable, probe cable(s) or any other external

connected cable(s).

Disconnect cables that are not needed for the basic use of the scanner:

Network cable

Cables to any external peripherals

ECG cables and other cables connected to the Patient I/O

Verify if the noise change or disappear when the cables are removed.

Often, this type of noise is due to grounding problems in the mains power system or that the scanner is

sharing a power line with other equipment.

PROPRIETARY TO GE

Section 7-9 - Troubleshooting Tips