Bode plotter: huge distortions at certain frequencies

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mark_dammer
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Joined: Sat Apr 07, 2018 7:49 pm

Bode plotter: huge distortions at certain frequencies

Post by mark_dammer » Sat Dec 29, 2018 3:54 pm

I notice that the Bode plot is showing crazy results at certain frequency ranges. Using the standard calibration setup I am getting jumping amplitude and phase at these ranges (see attached plot):
17 - 27 MHz
47 - 51 MHz
53 - 56 MHz
Is this known behaviour and are there any workarounds for this problem ?
I tried both the Bode plotter app that come with the RedPitaya and the one on the Marketplace. Both show the same distortions.
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