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Phase and amplitude stability

Question asked by bar28 on Oct 10, 2008
Latest reply on Oct 10, 2008 by Dr_joel
What is right method to test VNA testport cables, does they meet phase- and amplitude stability specs? I know, how to measure it but i'm more interested in to know cables positions and bending radius during the test. Should i start the measuring when tested cable is fully straight and continues to decrease the bending radius? I know that fully straight position is little bit abnormal.

I have done S11 measurement calibration direct on the VNA testport and after that connected the tested cable on it. Cable is ended good quality calkit short.  

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