AW: Dome Filter Question

[Haible Juergen]

	>Of course, but OTOH you need pretty exactly 90 Deg for good
sideband suppression.
	>I doubt that very little erros will be visible with this "Lisajous"
figure
	>method. And then you don't know, where the sideband suppression is
spoiled.
	>Is it the network, the multipliers or the quadrature osc?

You're probably right, but there's one thing that makes the Lisajous method
better than one would expect: While it's hard to decide a circle from an
ellipse
in a static case, if you make a frequency sweep you can see if the 
circle stays the same or if it "wobbles" slightly.

JH.