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Well, THAT's Not Gonna Fucking Work!
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<blockquote data-quote="Phil Graham" data-source="post: 39578" data-attributes="member: 430"><p>Re: Well, THAT's Not Gonna Fucking Work!</p><p></p><p></p><p></p><p>Peter,</p><p></p><p>You're an EE, so you don't get a pass on supporting this one. Plus you can't throw rocks at me from Australia :lol:</p><p></p><p>If the effect in the trace was a consequence of DC blocking capacitors, it would show up in the magnitude response, as the RC conjugate of a DC blocking capacitor+build out resistor is a minimum phase system. Both channels exhibit substantial LF phase shift without the corresponding magnitude shift. There's some non minimum phase funny business here. It could be in the dsp, but it seems more likely to be in the analog bits or AD/DA.</p><p></p><p>The high frequency effects near Nyquist are going to be a consequence of how the DSP handles bilinear Z math. The polarity inversion is anybody's guess.</p></blockquote><p></p>
[QUOTE="Phil Graham, post: 39578, member: 430"] Re: Well, THAT's Not Gonna Fucking Work! Peter, You're an EE, so you don't get a pass on supporting this one. Plus you can't throw rocks at me from Australia :lol: If the effect in the trace was a consequence of DC blocking capacitors, it would show up in the magnitude response, as the RC conjugate of a DC blocking capacitor+build out resistor is a minimum phase system. Both channels exhibit substantial LF phase shift without the corresponding magnitude shift. There's some non minimum phase funny business here. It could be in the dsp, but it seems more likely to be in the analog bits or AD/DA. The high frequency effects near Nyquist are going to be a consequence of how the DSP handles bilinear Z math. The polarity inversion is anybody's guess. [/QUOTE]
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