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Viewing 15 posts - 46 through 60 (of 98 total)
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  • in reply to: Phase shifter #7137
    Carsten
    Participant

      it does the right thing in an AC simulation

      I would guess, that it is not processed in a transient simulation, because an ideal shifter would not make sense here. But I would expect an error message in this case.

      AC-Simulation: 90° phase shifter transforms Open condition on the right side to a short on the left side. thats why there should be voltage=0 at Pr1

      • This reply was modified 2 years ago by maelh. Reason: Convert all remaining http links to https links
      in reply to: equation block auto-renaming variable #7133
      Carsten
      Participant

        >> Now you should have y=1 and a=1.
        >Should have or do you have it?
        I have. All ok here so far.

        >> open it again. Add. enter name ‘b’. enter value ‘2’. Apply.
        >So you change ‘y’ to ‘b’ and ‘1’ to ‘2’ and then press “Apply” and not “ok”?
        No. Add creates a new line. Add name ‘b’ and value ‘2’ in the empty line.

        > > name is now automatically change to ‘a’ , which it should not.
        > You mean you are still in the dialog and the ‘b’ in the line-edit field is changed to ‘a’?
        yes. As soon as I hit apply.

        I just confirmed it unter Win10.

        Carsten
        Participant

          qucs project

          in reply to: mouse scroll inside tabular plot #7110
          Carsten
          Participant

            when I select the table with a click, it would also be nice to scroll it with Arrow up/down and Page up/down.

            in reply to: 2D Arrays #7106
            Carsten
            Participant

              I Agree

              in reply to: Functions for multi-dimensional data #7105
              Carsten
              Participant

                Hi, drahnoel,

                > A range is applied to the data and to the dependent variable…..
                you probably mean _in_dependent variable, right?

                >get_dependent(variable, “name”)
                >Get the dependent of data with given name. Is usually equivalent to using name directly, unless a range was applied.

                I don’t understand this. Could you elaborate please?

                Cheers
                Carsten

                in reply to: Crystal simulation wit S parameters not correct #7101
                Carsten
                Participant

                  @Michael: Vlt. ließen sich solche Fälle automatisch erkennen und Qucs könnte eine Warnung ausgeben?

                  in reply to: Equations in nested simulations #7100
                  Carsten
                  Participant

                    Hi Michael,

                    the same problem with the Min() function appears in the optimization sim.

                    I want to minimize a goal that is complex. QS finds the value with the most negative Re(goal_variable).

                    Probably based on the same source code piece

                    Carsten
                    Participant

                      greetings to another wine user.

                      you can define a parameter in an equation and use the Tuning-Tool on that.

                      in reply to: S parameter for complex source impedance #7092
                      Carsten
                      Participant

                        in the forum post

                        Simulation of S-Parameter-Matrix with complex Port Impedances
                        (cannot post links here)

                        it is mentioned, that complex port impedances are not supported.

                        anyway, if you add a ‘*’ in the impedance definition (e.g. 15+15j  changed to 15+15*j), you get the -1,1547 dB.

                        btw: I would have used the formula to the right. That gives -1,23 dB. Don’t know, which is the right answer

                        • This reply was modified 2 years ago by maelh. Reason: Convert all remaining http links to https links
                        in reply to: complex impedance #7089
                        Carsten
                        Participant

                          or matrix type “A”

                          • This reply was modified 2 years ago by maelh. Reason: Convert all remaining http links to https links
                          in reply to: cascaded parameter sweep #7088
                          Carsten
                          Participant

                            Oh, maybe this is related to this bug report from one week ago?

                            • This reply was modified 2 years ago by maelh. Reason: Convert all remaining http links to https links
                            in reply to: Can not move marker on S parameter schematic. #7087
                            Carsten
                            Participant

                              ignore my last 2 posts.

                              Thanks to you, I found out that it is possible to drag ‘n’ drop the marker directly.

                              In my installation, it works fine.

                              remember: In qucs, selection of overlayed items (e.g. a diagram and a “marker info callout”) works as follow:
                              A) none of the items is selected yet: mouse click selects top most item
                              B) one of the items is already selected: mouse click selects next item.

                              What happens to me regularly:
                              – diagram is selected
                              – I want to move the “marker info callout” and try to drag’n’ drop it somewhere (but forgot, that the diagram is still selected).
                              -> diagram is moved instead of marker box.

                              in reply to: Parse .dat files in python #7086
                              Carsten
                              Participant

                                Thanks for sharing

                                in reply to: Crystal simulation wit S parameters not correct #7085
                                Carsten
                                Participant

                                  similar things happen in CST, when S-Params from an 3DEM-Simulation need to be interpolated. In that case it helps to change s-param interpolation from polar to cartesian domain.

                                  Qucs offers similar options in touchstone file component. maybe that helps?

                                   

                                  • This reply was modified 2 years ago by maelh. Reason: Convert all remaining http links to https links
                                Viewing 15 posts - 46 through 60 (of 98 total)