There is a very popular thread on the Spooky2 forum called SuperSweep 48,800 – 43Mhz. The author of the sweep, Stu Tooley, created a sweep that goes between 48,800 to 43 Mhz for the GeneratorX and 48.8Khz to 20 Mhz for the Spooky2-XM, that has a step size between each frequency of 0.025%. It turns out the standard spectrum sweep will have this small step percentage for the higher frequencies of the sweep, but for the lower frequencies the step percentage will be larger. This means there are many potential MORs (Mortal Oscillatory Rates) that will be missing in a spectrum sweep that covers a large range or number of octaves.

To remedy this, the sweep is broken up into single octaves, and a spectrum sweep is performed in that octave. With this approach, the lower frequency step size is 0.025% or less.