Data Connect DSP19.2 Guide de l'utilisateur télécharger pdf (Page 24)

Gyro Control Unit (GCU)

User’s Guide

MaxMetrix, Scottsdale, AZ

PN: GCU-2K1-UG:RevI.2 NGC

Figure 20 Spectrum Analyzer with 800Hz notch filter turned ON

4.1.3.1 DATA SELECT

The Data Select radio buttons allow the user to select the input source to the Spectrum Analyzer. The

spectrum analyzer first applies a window function (i.e., Hanning Window) to the input data stream and then

calculates a 32768 point FFT. The resultant power spectral density estimation (PSDE) is then calculated by

taking the magnitude of the FFT complex data set and plotting it in the display.

4.1.3.2 AUTO-Y

Checking the Auto-Y selection for either the time domain or the frequency domain will automatically scale

the data range in the associated graph.

4.1.3.3 PSDE

The magnitude of the power spectral density estimation can be displayed on either linear or logarithmic

scale.

4.1.3.4 PEAK HOLD ENABLE

The peak hold enable plots the peaks of the PSDE output. Un-checking the option clears the Peak Hold

graph. (i.e., the Magenta Plot in the spectrum window).

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Data Connect DSP19.2 Guide de l'utilisateur Page 24