Setting Up a Frequency Sweep with Harmonic Balance

Nexxim harmonic balance analysis supports a sweep of frequency using a local variable for the frequency value. (For DC analysis or transient analysis, no frequency parameters are predefined.) To perform a frequency sweep with harmonic balance analysis, perform the following steps:

1. Under Circuit, select Add Nexxim Solution Setup. Select Harmonic Balance for the Analysis Type and 1-Tone or N-Tone for the Category as appropriate. Click Next.
2. The Harmonic BalanceAnalysis dialog box appears.
3. For N-Tone analysis, specify the No. of Tones. The Max. Harmonic Number table shows the frequency or frequencies. Specify the MaxK value for each frequency. To set up a sweep, click in the Value field for a frequency and enter the name of the local variable to be created. Press Return.
4. The Add Variable dialog box opens. The local variable name you entered in the Parameter window appears in the Name field. Enter a default value for the local parameter in the Value field. Click the Local Variable radio button. Click OK.
5. Repeat steps 3 and 4 until all desired frequencies have been set up as variables.
6. Locate the Sweep Variables panel at the right side of the Solution Setup box.
7. The Add/Edit Sweep dialog box opens. Select the local variable from the Variable field. Sweep options are:

• Single Value (enter the value and units)
• Linear Step (enter Start, Stop, and Step values and units)
• Linear count (enter Start, Stop, and Count values and units)
• Decade count (enter Start, Stop, and Count values and units)
• Octave count (enter Start, Stop, and Count values and units).

8. Click Add.
9. Repeat steps 7 and 8 until all frequency sweeps have been specified. If desired, add sweeps of component-value local variables using the procedure given under Setting Up a Local Variable on a Component Parameter.
10. Click OK.
11. Complete the Solution Setup information (Output Quantities, etc.), then click Finish.