Let us try to understand what waterfall frequency spacing is. Waterfall frequency spacing is the gap between spectral lines in an FFT plot.
For example, if you had an analysis frequency of 0Hz to 100Hz and 100 spectral lines, then Frequency Spacing is 1Hz.
So why is there a ‘Requested Frequency Spacing’ and an ‘Actual Frequency Spacing’? Continue reading What is waterfall frequency spacing? And how does the DATS parameter ‘Requested Frequency Spacing’ work?3539class="post-3539 post type-post status-publish format-standard hentry category-signal-processing category-tutorial tag-block-size tag-blocksize tag-fft tag-fft-block-size tag-frequency tag-frequency-domain tag-frequency-resolution tag-order-plot tag-rpm tag-waterfall tag-waterfall-plot tag-waterfall-smearing"
When analysing a waterfall or performing order analysis it is important to consider the frequency resolution or the frequency spacing.
There is often a desire to increase the resolution to finer and finer detail. But that is a process of diminishing returns, and actually fraught with danger. And that danger is waterfall smearing. Continue reading What is “waterfall smearing”?2639class="post-2639 post type-post status-publish format-video hentry category-dats category-signal-processing category-tutorial category-video tag-dats tag-fft tag-harmonics tag-noise tag-orders tag-rotating-machinery tag-speed tag-tacho tag-vibration tag-video tag-waterfall post_format-post-format-video"
This is complete version of the video illustrating my recent article How To Measure Noise & Vibration In Rotating Machines. This video was previously published on the blog in 3 parts.
The video will be best enjoyed by selecting the 720p option and selecting full screen mode.Proudly powered byWordPressDesign byBlogoLife