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Difference between revisions of "NVGate Octave Analyzer"
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→Structure and Operation overview
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[[Image:oct_01.png|framed|none]] | [[Image:oct_01.png|framed|none]] | ||
The filtered signal is input to a squaring module in order to get true RMS detector. | The filtered signal is input to a squaring module in order to get true RMS detector. | ||
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A hold box allows to get Maximum and Minimum spectra during one measure. | A hold box allows to get Maximum and Minimum spectra during one measure. | ||
A stabilization delay is implemented in order to ignore and suppress the transient response of passband filters. It is automatically taken into account after any change of input setup. It is equal to 5 periods of the lower frequency filter for 1/3<sup>rd</sup> octave and octave filters. This delay is four times greater for 1/12<sup>th</sup> octave filters (i.e. 20 periods of the lower frequency filter) and eight times greater for 1/24<sup>th</sup> octave filters (i.e. 40 periods of the lower frequency filter). | A stabilization delay is implemented in order to ignore and suppress the transient response of passband filters. It is automatically taken into account after any change of input setup. It is equal to 5 periods of the lower frequency filter for 1/3<sup>rd</sup> octave and octave filters. This delay is four times greater for 1/12<sup>th</sup> octave filters (i.e. 20 periods of the lower frequency filter) and eight times greater for 1/24<sup>th</sup> octave filters (i.e. 40 periods of the lower frequency filter).For example, if lower frequency filter is centered at 1 Hz, then the stabilization delay is equal to 5 seconds for octave and 1/3<sup>rd</sup> octave, 20 seconds for 1/12<sup>th</sup> octave and 40 seconds for 1/24<sup>th</sup> octave. During this delay the detectors are inactive. | ||
For example, if lower frequency filter is centered at 1 Hz, then the stabilization delay is equal to 5 seconds for octave and 1/3<sup>rd</sup> octave, 20 seconds for 1/12<sup>th</sup> octave and 40 seconds for 1/24<sup>th</sup> octave. During this delay the detectors are inactive. | |||
The filter bank continuously runs and instant averaging is always available (excluding time period for filter stabilization). | The filter bank continuously runs and instant averaging is always available (excluding time period for filter stabilization). | ||