Dear Dr_Joel,

I have doubt in calculating the physical length of DUT.

Recently i have been seen some problem in our DUT inside like short. We found the problem as short using Return loss and Phase performance (0 dB and 180 deg). So i wanna calculate where it could be happened. Please advice me the equation to find the problem where it occured.

I have doubt in calculating the physical length of DUT.

Recently i have been seen some problem in our DUT inside like short. We found the problem as short using Return loss and Phase performance (0 dB and 180 deg). So i wanna calculate where it could be happened. Please advice me the equation to find the problem where it occured.

It would help if you could post some additional information:

1) what are you measuring (what is your device under test?). You say a short? is this a cal standard or if not, what is it used for?

2) what are your expected results

3) what are your measured results, please post the data plot.