The big peak in the still left edge of the spectrum plot would be the 60 Hz elementary. The large harmonic peaks the thing is present that my wall electrical power right here isn't really super-thoroughly clean. These types are greater for powering sensitive equipment, but none that we’ve tested https://jasperloppo.ivasdesign.com/55449560/how-much-you-need-to-expect-you-ll-pay-for-a-good-ups-syndome