Difference between revisions of "NVGate 2021: Release note fr"

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Thanks to its maximal flat frequency response in the pass band, the Butterworth filter is commonly used in applications where signal distortion should be minimized, such as audio noise reduction.  It is also widely used for anti-aliasing. The Chebyshev filters are optimized to provide steep roll-off, and they are usually used in applications where the maximum rejection of the nearby frequencies is required.
Thanks to its maximal flat frequency response in the pass band, the Butterworth filter is commonly used in applications where signal distortion should be minimized, such as audio noise reduction.  It is also widely used for anti-aliasing. The Chebyshev filters are optimized to provide steep roll-off, and they are usually used in applications where the maximum rejection of the nearby frequencies is required.


===Increased filter order===
===Ordre des filtres plus élevé===
The order of the filter affects the steepness of its roll-off. The higher the order is, the sharper the transition between the pass band and the stop band is. An example demonstrating the impact of the filter order is shown below:
L'ordre des filtres affecte la raideur de leur décroissance. PLus l'ordre est élevé, plus la trnstion entre le passe-bande et coupe-bande est brutale. Voici un exemple montrant l'influence de l'ordre du filtre:


[[File:butterworth_freq_response.png|600px]]
[[File:butterworth_freq_response.png|600px]]


For the high pass and low pass filters, the filter order can be selected from 1 to 40 in the Office mode, and from 1 to 10 in the Connected mode now. In the previous NVGate version, the maximum filter order was 6.
Pour les filtres passe-haut et passe-bas, l'ordre des filtres peut maintenant être choisi entre 1 à 40 en mode Office et entre 1 à 10 en mode connecté. Dans la version précédente de NVGate, l'ordre maximum du filtre était de 6.
 
For the band pass and band stop filters, the filter order is 2*N, and N can be selected from 1 to 30 in the Office mode, and between 1 to 10 in the Connected mode now. In the previous NVGate version, the maximum value of N was 5.


Pour les filtres passe-bande et coupe-bande, l'ordre des filtres est de 2 * N, et N peut maintenant être sélectionné entre 1 et 30 en mode Office, et entre 1 et 10 en mode connecté. Dans la version précédente de NVGate, la valeur maximale de N était de 5.


===Octave overall no limitation===
===Octave overall no limitation===

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