Why does the S-parameter element need such specific start and stop frequencies and number of points?
As mentioned before, the computational engine uses FFTs to integrated arbitrary sources with S-parameter data. Depending on the source characteristics it will need certain start and stop frequencies and number of points to match up with the simulation. At some time in the future, I will integrate in a feature that will perform some re-mapping of the frequency data to match the needed start, stop, and number of points requirements. For now, the plan is to have the user go to a VNA and measure his or her DUT with this frequency setup up, or have them do the re-mapping off-line before bringing the data into TLineSim.
