oermens wrote on Jan 10th, 2009, 11:56am:hi, i am using pss analysis to obtain quadrature phase error of a qvco.
[snipped]
should the results for phase of I+/Q+/I-/Q- be exactly 0/90/180/270
or
should the difference between I+/I- and Q+/Q- be 180 and between I+/Q+ and I-/Q- be 90?
My results are the second case (phase of I+ is not 0, but rest of relationships are valid), is it correct?
You should observe phase differences between them.
So your results are reasonable