Agilent Technologies HP 8642A/B Specifiche Pagina 157

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AM
Noise
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Introduction
Calibration of the AM Noise measurement type involves calibration of
the AM Detector Constant. The Detector Constant is the sensitivity of
the AM detector being used for the measurement expressed in equivalent
V/Rad. The noise floor (or maximum sensitivity of the system) is set by
the Detector Constant.
The amplitude of the AM detector's voltage output is proportional to the
AM noise (modulation) fluctuations at its input and its sensitivity. The AM
detector's sensitivity is a function of the power level at its input.
Calibration for an AM Noise measurement involves measuring the
relationship between a known signal and the output of the AM detector
being used. There are three methods available for calibrating the AM
Calibr Process: AM Noise 2-89
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