05-08-2012, 10:27 PM
You are nearly there Al it's quit a complicated design, as for the weeker harmonics/birdies then as you say some further waveform and voltage analasys should confirm wether it's supposed to be there or not, I guess that the upshot is that if all the main markers are the predominant ones then the machine is fully usable, I think even in the RA 17/117 book of words it mentions the odd unavoidable harmonic or sub harmonic birdie?
Lawrence.
Lawrence.
