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Vertical lines after TRL-calibration with waveguide

Question asked by AndréK. on May 31, 2008
Latest reply on Jun 4, 2008 by AndréK.
I have done a TRL calibration with the selected kit. So, I used a thru, a short and a lambda/4 offset short as cal standards. The result you can see in the picture.
A few weeks ago I have done the same calibration without any problems. Now there are everytime this lines. Does anybody know, where they come from?

André  

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