Real Tuner Performance

To see the behavior of a real tuner rather than that of the default dummy tuner, you have an option to load the real tuner parameters from its Tun.mem file. The file must be downloaded from your Homer first (the default destination is the User Folder but you may wish to change it to the TunMem subfolder of the User Folder).

To load a Tuner configuration:

  • Open the System Info window (Fig. 51). For the HoSim simulation program, the window contains an additional button, labeled  Load Mem .

  • Click the  Load Mem  button. An Open dialog pops up.

  • Browse for the Tun.mem file, then click  Open .

Fig. 51.  HoSim System Info window includes the  Load Mem  button.

To test the performance of your Tuner:

  • Define the simulation frequency in the More page of the Homer Model window (see below).

  • Click Plot in the DUT page of the Homer Model window, then click  Apply  . The DUT Reflection Coefficient window (Fig. 48) appears.

  • Click the Matchable radio button in the Show Area group of the DUT Reflection Coefficient window.

  • Click the Output radio button in the Refer Area to group of the DUT Reflection Coefficient window.

  • Open the Tuner View window (the Tuner button or the Tuner|View menu item); turn on autotuning by activating the  AT  button.

  • Start measurement by clicking the button (after clicking, the button turns to ).

  • Drag the mouse over the plot in the DUT Reflection Coefficient window and observe the input reflection coefficient in the Polar plot window and stub positions in the Tuner View window.