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Home | Technical Corner |
Dear Engineer,
Filters:
a) eliminate induced industrial noise
b) prevent "aliasing", a distortion that leads to contaminated digitized data
c) avoid residue in your coffee which improves taste
All the above are correct. However, Tech Talk will address just a) and b) in these articles about analog filtering and signal conditioning.
Sierra Sales can provide more information to help determine the best signal conditioning modules (SCMs) and filtering solutions for your data acquisition systems.
Kelvin Aist
Sierra Sales |
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Software: These programs give instruction to the CPU, which processes billions of tiny facts called bytes, and within a fraction of a second it sends you an error message that requires you to call the customer-support hot line and be placed on hold for approximately the life-span of a caribou.
Dave Barry |
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 Filtering in SCMs by Dataforth
Signal conditioning modules (SCMs), used to measure process control variables(temperature, pressure, strain, position, speed, level, etc.), are subject to external noise signals, which are eliminated through filters. For a brief review of filter fundamentals, read further. |
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 Aliasing and Analog Filtering by GE Fanuc
Analog filters in a data acquisition system may be needed for faithful reproduction of signals during analog to digital signal conversion. Filters prevent distortion called "aliasing", that causes false signals to contaminate data. To compare trade-offs of analog filter selection, read on. |
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