Problem with Harmonics Viewer at lower frequencies

I’m having trouble with the Harmonics Viewer at lower frequencies. I’m using Spike 3.0.12 with an SA44B.

What I’m finding is that the Harmonics Viewer works as expected for a fundamental tone at 1MHz and higher frequencies. But it gets completely confused when presented with a fundamental tone at, say, 100kHz. See attached screenshots for what I’m talking about.

Actually, the 1MHz example also has an anomaly: it looks like it has identified the wrong tone for the 4th harmonic–it picks the strongest signal in the neighborhood rather than just measuring the level of the harmonic based on the frequency of the fundamental, it seems.

Anyway, any ideas of how to get this to work or can you put this in the queue for an upcoming release?

Also, an enhancement request: it would be great if the harmonics view also showed THD calculated from what you see displayed.

Thanks!

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Hi JuiceKing,

Thank you for pointing this out. We were unaware of this issue. This is because the harmonic viewer is using a 200kHz span for each patch and at 100kHz center frequency, the previous harmonic is visible in each step. I can look into resolving this for a future update. A viable alternative for now would be to utilize the step entry, and use the arrow keys to step to each harmonic. I apologize for the inconvenience.

Regards,
A.J.

Thank you, A.J.

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