DIRECTION 5854713-100, REVISION 2
VENUE FIT™ SERVICE MANUAL
7-26
Chapter 7 - Diagnostics/Troubleshooting
P R E L I M I N A R Y
Section 7-5
Noise Troubleshooting
7-5-1
Purpose of this Section
In this section you will find Noise troubleshooting procedures and hints.
7-5-2
Introduction
Before you start troubleshooting the noise, you should read the following subsections:
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•
•
- see below
When talking to the customer, try to gather as much information as possible about the conditions when
the noise appear:
Is the noise present...
… all the time?
… after some time of use? (After how long time?)
… at special times of the day (or night)? When?
… at all locations in the hospital, or only in one room/area?
… from time to time, no special pattern of time is observed?
7-5-3
Overview of Types of Noise
There are different types of noise. Use the information next to classify the noise and possible cause.
7-5-3-1
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.
7-5-3-2
Noise Received via the External Cables
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).
To troubleshoot this type of noise, disconnect cables that are not needed for the basic use of the
scanner. Check for any change in the noise each time a cable has been disconnected from the
Venue Fit™ .
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Network cable
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Cables to any external peripherals
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Other cables connected to the Patient I/O
Summary of Contents for Venue Fit
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