Difference between revisions of "NVGate FFT"

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NVGate FFT (view source)

Revision as of 16:51, 7 January 2022

2,232 bytes removed ,  16:51, 7 January 2022
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{|class="wikitable" style="background:white" border="2" cellspacing="0" cellpadding="4" width="100%" align="center"
{|class="wikitable" style="background:white" border="2" cellspacing="0" cellpadding="4" width="100%" align="center"
|'''Type'''
|'''Type'''
|'''Description'''
|'''Available if'''
|'''Size'''
|'''Size'''
|'''Dimension'''
|'''Dimension'''
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|-
|-
|Filtered signal
|Filtered signal
|Display the input time signal after filtering.
|a filter is selected in the FFT x/Channel x/Input filter setting
|256 pt
|256 pt
|2D  
|2D  
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|-
|-
|Triggered block
|Triggered block
|Displays the signal after being triggered by the event selected with the ''FFT x/Trigger/Trigger ''setting''.''
|
|(Resolution-1)*2,56
|(Resolution-1)*2,56
|2D  
|2D  
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| Yes
| Yes
| FFT
| FFT
|}<br clear="all">
''Results below are calculated from the triggered block results. The refresh & computation rate depend on the PC to analyzer connection availability (non real-time results)''
{|class="wikitable" style="background:white" border="2" cellspacing="0" cellpadding="4" width="100%" align="center"
|'''Type'''
|'''Description'''
|'''Available if'''
|'''Size'''
|'''Dimension'''
|'''Domain'''
|'''Save'''
|'''Option'''


|-
|-
|Trigger Shaftview
|Trigger Shaftview
|
|
|(Resolution-1)*2,56
|(Resolution-1)*2,56
|2D
|2D
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|-
|-
|Min level
|Min level
|Displays the minimal value of the signal.
|
|1pt
|1pt
|1D
|1D
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|-
|-
|Max level
|Max level
|Display the maximal value of the signal.
|
|1pt
|1pt
|1D
|1D
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|-
|-
|Peak
|Peak
|Display the absolute value of Min level and Max level.
|
|1pt
|1pt
|1D
|1D
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|-
|-
|Peak-Peak
|Peak-Peak
|Displays the difference between Min level and max level. Peak-Peak level ≥ 0.
|
|1pt
|1pt
|1D
|1D
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|-
|-
|Crest Factor
|Crest Factor
|Display the ratio Peak level/RMS level. Characteristics of the Crest Factor:
* Crest Factor ≥ 1
* DC level = 1
* Crest Factor of sinus = [[Image:FFT_03.gif]]
* Max level = [[Image:FFT_04.gif]]    with N = number of samples in the triggered block = 2.56*lines number-1
|
|1pt
|1pt
|2D
|2D
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|-
|-
|Avg. block
|Avg. block
|Display the time signal block average.
|the ''FFT x/Average/Domain ''setting value is Time.
|(Resolution-1)*2,56
|(Resolution-1)*2,56
|2D  
|2D  
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|-
|-
|Avg. Trigger Shaftview
|Avg. Trigger Shaftview
|
|
|(Resolution-1)*2,56
|(Resolution-1)*2,56
|2D
|2D
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|-
|-
|Weighted block
|Weighted block
|This result displays the signal after being weighted by the weighting window selected using the ''FFT x/Channel x/Weighting window'' setting.
|
|(Resolution-1)*2,56
|(Resolution-1)*2,56
|2D  
|2D  
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|-
|-
|Spectrum
|Spectrum
|Display the result of the FFT processing after time averaging.
|the ''FFT x/Average/Domain ''setting value is Time.
|Resolution
|Resolution
|2D  
|2D  
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|-
|-
|Inst. spectrum
|Inst. spectrum
|Displays the FFT processing results.
|the ''FFT x/Average/Domain ''setting value is Spectral.
|Resolution
|Resolution
|2D  
|2D  
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|-
|-
|Avg. spectrum
|Avg. spectrum
|Displays the instant spectrum average result.
|the ''FFT x/Average/Domain ''setting value is Spectral.
|Resolution
|Resolution
|2D  
|2D  
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|-
|-
|Order & Overall
|Order & Overall
|Displays the result of the computation of the orders chosen with the ''FFT x/Channel x/Tracked order'' setting and the Overall level.
|the ''FFT x/Overall Analysis/Band power tracking '' is set to On.
|1 pt
|1 pt
|1D  
|1D  
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|-
|-
|Inst. cross-spectrum
|Inst. cross-spectrum
|Displays the cross spectrum between the 2 channels selected.
|a cell is checked in the ''FFT x/FFT analysis/Cross spectrum ''matrix.
|Resolution
|Resolution
|2D  
|2D  
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|-
|-
|Avg. cross-spectrum
|Avg. cross-spectrum
|Displays the instant cross spectrum average results.
|a cell is checked in the ''FFT x/FFT analysis/Cross spectrum ''matrix.
|Resolution
|Resolution
|2D  
|2D  
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|}<br clear="all">
|}<br clear="all">


* '''Filtered signal''': This result is available if a filter is selected in the FFT x/Channel x/Input filter setting. It displays the input time signal after filtering.
* '''Filtered signal''': This result is available if a filter is selected in the FFT x/Channel x/Input filter setting. It displays the input time signal after filtering.
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