Smart auto-ranging RMS measurement method and apparatus
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United States of America Patent
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Apr 30, 2002
Grant Date -
N/A
app pub date -
May 8, 1998
filing date -
May 8, 1998
priority date (Note) -
Expired
status (Latency Note)
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Abstract
An apparatus and method for performing an auto-ranging function in electronics test equipment monitors both the RMS value and the peak value of the input signal to be measured. In the subject system, a peak signal measurement which exceeds the dynamic range of the currently-selected range will cause selection of the next higher range. A peak signal measurement which would exceed the dynamic range of the next lower measurement range, will prevent selection of the next lower range when the RMS value would otherwise have caused that selection. A peak signal value which does not exceed the dynamic range of the currently-selected measurement range, or the dynamic range of the next lower measurement range will allow control of measurement range selection to be determined by the RMS value of the input signal.
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