conducted disturbance
English translation: See explanation below...
| 13:14 Mar 20, 2007 |
| English language (monolingual) [PRO] Tech/Engineering - Electronics / Elect Eng | |||||||
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|  Selected response from: Tony M France Local time: 15:48 | ||||||
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| SUMMARY OF ALL EXPLANATIONS PROVIDED | ||||
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| 5 | See explanation below... |
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| 3 -1 | To my thinking .... |
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Answers
1 hr confidence: 
peer agreement (net): -1
peer agreement (net): -1| conduccted disturbance To my thinking .... Explanation: The conducted emission usually stems from some RF source that radiates waves (into the air) that are then picked up by wires and conducted into the unit under test. I have never heard "conducted disturbance" but if confronted with these two, I would then have to assume that the "conducted disturbance" was NEVER emitted as RF. For example, if you are using a switching power supply that is inadequately filtered, it could put noise (the disturbance) out over the power lines and this noise is then conducted (via wires) into the unit under test. Essentially, both are noise and they both enter the unit under test by way of the wires, but their travel paths are different, and so would be the mitigation measures. My opinion from the USA. |
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4 hrs confidence:
| conducted disturbance See explanation below... Explanation: Yes, there IS a difference, and an important one! Basically, there are 4 permutations of 2 possibilities that usually need to be taken into account in EMC work: Whether a piece of equipment is susceptible to interference from external sources = disturbance Whether a piece of equipment generates interference that could disturb other pieces of equipment = emission and Whether the interference comes in via cables (signal cables, or often, power cables) = conducted Whether the interferences is picked up in the form of radio (electromagnetic) waves = radiated So in your particular case, 'conducted disturbance' testing means testing to see if the piece of equipment is sensitive to external interference reaching it via its various cable connections And 'conducted emission testing' means testing to see if the equipment is generating potential interference signals and sending them out via its cable connections. Some equipment, by its nature, is more likely to generate interference signals — for example, equipment that uses heavy power, or involves motors: electric drills, vacuum cleaners, swicth-mode PSUs, lighting dimmers, motor speed controllers... Some equipment is more likely to be sensitive to interference from external signals — for example, sensitive measuring or medical equipment, audio amplifiers, etc. Certain types of equipment can also be both susceptible TO interference, AND generators OF it! — though if well designed, this is rarer. |
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