5-38 the signature shows distortion. However, in medium 2 and high ranges, the impedance of the inductor is low compared with the internal impedance of the Tracker 2000, so the signatures are a split vertical trace. Figures 5-37 and 5-38 show the same 490mH inductor being tested at 400 Hz and 2000 Hz. Figure 5-36.—Signatures of a 490mH ferrite inductor tested at 60 Hz. Figure 5-37.—Signature of a 490mH ferrite inductor at 400 Hz.
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