NARROWBAND SIGNAL RECOGNITION FOR EMI MEASUREMENTS

NARROWBAND SIGNAL RECOGNITION FOR EMI MEASUREMENTS

NARROWBAND SIGNAL RECOGNITION FOR EMI MEASUREMENT A test method and apparatus to aid a site operator in discriminating between signals measured at different times, as well as enabling a level of automation which is appropriate using state-of the-art instrumentation for performing EMI measurements, s...

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Hauptverfasser: TAYLOR, JOHN B, ELLIS, MICHAEL K
Format: Patent
Sprache:eng ; fre
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MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
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creator TAYLOR, JOHN B
ELLIS, MICHAEL K
description NARROWBAND SIGNAL RECOGNITION FOR EMI MEASUREMENT A test method and apparatus to aid a site operator in discriminating between signals measured at different times, as well as enabling a level of automation which is appropriate using state-of the-art instrumentation for performing EMI measurements, such as open-site EMI measurements. Preferably, discrimination between the two signals is based on the two signals being separated by at least a frequency E defined as: E = 2(frequency span/N) + K * RBW where: E = possible frequency error of a signal; frequency span = frequency range swept by a measuring receiver, for example, a spectrum analyzer; N = number of points measured; RBW = resolution bandwidth of a resolving bandpass filter of the measuring receiver; and K = constant less than or equal to one to account for unknown signal characteristics. With the specific application to open-site EMI measurements, preferably signals are allowed to be falsely detected as separate signals in order to take into account unknown signal characteristics, i.e., 1 RBW ? K * RBW.
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subjects MEASURING
MEASURING ELECTRIC VARIABLES
MEASURING MAGNETIC VARIABLES
PHYSICS
TESTING
title NARROWBAND SIGNAL RECOGNITION FOR EMI MEASUREMENTS
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