I am using the uncertainty calculator to calculate the uncertainty in measured group delay. I first click on "Set Chart Parameters." Then in the tab named "Group Delay," I am asked to input the frequency (in GHz) and the electrical length (in m). How do I calculate the electrical length? I thought the electrical length is expressed in radians as:

electrical length = 2 * pi * f * L,

where L is the physical length of the device (in meters). Is the calculator actually asking for the physical length?

Thank you for the calrification.

electrical length = 2 * pi * f * L,

where L is the physical length of the device (in meters). Is the calculator actually asking for the physical length?

Thank you for the calrification.