Tuning
The Tune dialog box shown below allows you to manually alter multiple elements and/or User Variables while observing the effects graphically. Values are changed according to standard EIA values (user selectable). Storage registers are available to temporarily preserve intermediate circuit parameters.

tune.tif (5690 bytes)

Param Field

The Param field of the dialog box allows you to specify an element parameter or User Variable to be tuned. To tune an element you must specify the reference designator and desired parameter separated by a colon, e.g., C15:C. In this example, the capacitance of C15 is selected for tuning. To tune a User Variable simply enter the variable name. One restriction applies to User Variables, however: the Variable MUST have been defined as a constant. You can not tune a User Variable which is dependent upon other variables:

X1=5 ! Tuneable

X2=X1*3+2 ! Not tunable, dependency on X1

Value Field

Once a reference is entered into the Param field you can advance to the Value field by pressing <TAB>. The parameters current value is automatically displayed. You can use the '+' and '-' buttons or the up and down arrows next to the Solve button to increment or decrement the current value. Once the desired values are entered press <ENTER> or click the Solve button to begin solving.

AutoSolve Mode

Eclipse may be configured to automatically solve the circuit and display the results after a value is modified using the '+' and '-' buttons or the up and down arrows next to the Solve button. This feature is enabled when the AutoSolve box is checked. When this feature is disabled you must press <ENTER> or click the Solve button to begin analyze the circuit.

Change by

When incrementing or decrementing parameters, you can choose to use percentages or standard EIA values. The choices are 0.01%, 0.1%, 1%, 5%, 10%, 1% EIA, 5% EIA or 10% EIA and are selected using the Change by combo box. EIA values are specific values readily purchased for components such as resistors and capacitors. You may also use tuning Hotkeys to quickly change the increment/decrement factor.