Narrow band spectral analysis – FFT
Comprehensive spectral results set
The FFT module offers standard to advanced analysis results:
Trigger blocks, averaged in time domain or instantaneous, weighted or not
Spectra (up to 25601 lines at 40 kHz) , instantaneous, averaged in spectral or time domain, averaged complex
Cross-spectra, FRFs (H1, H2), coherence, cross-spectra
Lissajous, envelope demodulation
Orders, overall bandwidth tracking
Acoustics and human vibration weightings
Any units: RMS, Peak, pk-pk, PSD, ESD, RMS PSD
Any integration: single/double integration (from acceleration to displacement), single/double differentiation (from velocity to angular acceleration)
The perfect tool for bump and rooving impact tests
Acquiring and reporting bump/impact tests has never been so easy:
The Force/Response windows apply to all channels simultaneously with a live overlaid of both weighted and not
It shows the coherence and averaged FRFs before accepting or canceling the impact
Impact route follows Excel-based steps sequence with direct indication and navigation from the NVGate control panel
Automatic peak detection in the spectra with immediate Excel feeding for live bump test reports
Mixes acoustics and vibration with multi-bandwidth analysis
Mixing microphones and accelerometers in a measurement is a common application in NVH tests. The need of a common resolution (usually 1Hz) with different bandwidths for the 2 physics requires specific capabilities.