Kerry Posted January 29, 2018 Share Posted January 29, 2018 When using the Network Analyzer, can W1(+) & Scope Ch1(+) be at different nodes and still potentially produce a useful output (hypothetically/theoretically)? Link to comment Share on other sites More sharing options...
Alex Posted January 30, 2018 Share Posted January 30, 2018 I think so. Can you briefly describe the setup Link to comment Share on other sites More sharing options...
Kerry Posted January 30, 2018 Author Share Posted January 30, 2018 In a step-down switching regulator feedback resistor network, I am inserting a 51-Ohm resistor (is this sufficient for the AD2?) between the bottom feedback and ground, across which I will apply the signal (W1). I am adding a resistor network in parallel with my total feedback network, from Vout to ground. Scope Ch2 will be at the intersection of the two resistors in the added resistor network. Scope Ch1 will be at the feedback node (intersection of Rtop and Rbot in the feedback network). This modification of the standard Bode plot method for a step-down switching regulator allows all grounds to be connected, eliminating the need for a differential signal. Link to comment Share on other sites More sharing options...
Kerry Posted January 30, 2018 Author Share Posted January 30, 2018 This gave a beautiful Bode plot. By the way, is there a way to graph the gain and phase on the same plot, using two different Y axes? Link to comment Share on other sites More sharing options...
Kerry Posted January 30, 2018 Author Share Posted January 30, 2018 Also, is there a way to include the 'Cursors' data/window in the saved image? Link to comment Share on other sites More sharing options...
Alex Posted January 31, 2018 Share Posted January 31, 2018 I don’t know whether cursors can be included in the image file. I doubt that you can graph and phase in the same plot with Waveforms. However, you may do that with python or C++. @attila can answer these questions Link to comment Share on other sites More sharing options...
attila Posted January 31, 2018 Share Posted January 31, 2018 Hi @Kerry The magnitude and phase are shown separately, there is no option to have these in the sample plot. To have the Cursors view/table in the picture, in the Export dialog select as source the Network Analyzer. You could also use Alt+PrtScr to copy the current window image to the clipboard, then with Ctrl+V paste it in your document. Link to comment Share on other sites More sharing options...
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Kerry
When using the Network Analyzer, can W1(+) & Scope Ch1(+) be at different nodes and still potentially produce a useful output (hypothetically/theoretically)?
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