A new feature included in the next beta version of NVH will see the introduction of the Harmonic Marker Counter.
Previous versions of the NVH software have utilised only 5 Harmonic Markers/Rulers to identify unknown harmonics/vibration orders.
The images below demonstrate a typical example where multiple unknown vibrations may well be attributed to fundamental vibrations such as E2. (A second order/harmonic engine vibration naturally caused by combustion events in a four cylinder engine)
With only 5 harmonic rulers available, it was difficult to pin point which of the above unknown vibrations were in fact harmonics of E2
Under the Options tab select Advanced Options and increase the Harmonic Marker count to the relevant number required up to a maximum of 64
The image below highlights the benefits of multiple Harmonic Markers/Rulers in order to identify unknown vibrations and therefore provide information on their origin.
In order to reduce the "clutter" about multiple harmonic rulers that may be in close proximity to one another, the first 3 harmonic rulers are numerically identified and their frequency indicated based on thier postion in the spectrum
To reveal the Harmonic Ruler count and frequency (position within the spectrum) of a harmonic ruler (without these details) hover your mouse over the ruler where the above data will be revealed
I hope this helps, take care........Steve