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I have it in XY mode. I can see the markers and move them but I’m not sure what this is supposed to look like. It’s a function confirmation protocol. Anyway, I think if I move straight to production of the sound discriminator wave and the 21.25 symmetrical trace for the sound IF, with help, I’ll probably learn more than I would going through all the tests. I’ve been in contact with the seller and after many email exchanges I’m confident in his statement the sweep generator works accurately.
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