Download - NTi Audio

FFT Analysis + Tolerance
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Measurement Unit
Select the measurement unit as follows:
dB
Sound level in dBSPL
This measurement unit is permanently selected
upon connecting a NTi Audio measurement microphone with electronic data sheet.
dBu
Input level in dBu
dBV
Input level in dBV
V
Input level in Volt
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Page Selector X-Scale and Parameter Setting
20k
Shows FFT result of the frequency range.
484.38 Hz - 20.594 kHz in a resolution of 141.62
Hz with 142 bins shown on the display.
1k7
Shows FFT result of the frequency range.
58 Hz - 1.722 kHz in a resolution of 11.72 Hz with
142 bins shown on the display.
200
Shows FFT result of the frequency range.
7 Hz - 215.01 Hz in a resolution of 1.47 Hz with 142
bins shown on the display.
Usr
User Range
(applicable with optional Extended Acoustic Pack
or Spectral Limits Option)
5 Hz - 20 kHz in zoom mode with a minimum resolution of 0.366 Hz and 142 bins displayed.
Set
Selection for FFT Windowing:
• Hann: Default for acoustic measurements
• Dolph-Chebyshev: for analyzing small signals
(e.g. harmonics) close to a dominant signal.
The page button
switches these display modes.
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