Patent ID: 6681191
Filing Date: 2004-01-20
Classification: G01R

Abstract:
A frequency domain analysis system incorporated into a time domain measurement instrument having an acquisition system that generates a waveform record of digital data samples of an input signal comprising:a duration control having a time control that adjusts the length of the waveform record in seconds, a sample rate control that adjusts the acquisition system sample rate, and a record length control that adjusts the number of samples in the waveform record; a resolution control that adjusts the number of digital data samples over a specified duration; a frequency spectrum gate applied to the acquired waveform record having controls that adjust a gate duration in seconds and a gate length in samples and positions the gate over the digital data samples of the waveform record; a window filter applied to the digital data samples of the waveform record within the gate; and a spectrum analysis generator having center frequency, frequency span and resolution bandwidth controls receiving the filtered waveform record within the gate and generating frequency domain values over the gated waveform record with the spectrum analysis generator outputting frequency domain values defined by the frequency span and center frequency controls; wherein the resolution bandwidth control of the spectrum analysis generator adjusts the gate duration of the frequency spectrum gate and the gate duration controls of the frequency spectrum sate adjusts the resolution bandwidth of the spectrum analysis generator.