$iPad{iELANA - } iELANA - Parameter settings

With the parameter settings you define the appearance and the achievable limits of the diagrams. The two most important parameters are the lower frequency fmin and the upper frequency fmax - they define the frequency band within which the circuit is calculated iteratively in individual steps. You may require several attempts of repetitions and re-calculations of the circuit in which you customize each step to change one or both frequencies. You have to find a circuit behavior that delivers you evaluable results. As a recommendation set a frequency range of several decades for the first attempt and restrict this range later in the experiments so far until you get the desired result.

The number of values for the table mainly determines the quality of the interpolated curves, which are shown in the diagrams for a calculated circuit. In second line the chosen number also affects the computation time needed for a calculation pass on an iPhone, iPad or iPod Touch. Choose at best only 100 or 500 table values for the calculations for the experimental calculations until you have found a suitable frequency range for a circuit and increase this number in the final settings.

The remaining parameters have no influence on the computing speed and accuracy. They affect the appearance of the diagrams and the value table. In the diagrams both axes can be shown independently divided linear or logarithmic. The setting for the frequency division has a coupled impact to the Bode diagram and the phase diagram. The setting of the output ratio affects only on the Bode diagram. On Nyquist diagrams both options have no effect. There, both output quantities are always displayed linear.

If the chosen frequency range for the calculations of a circuit has more than one decade, it's usually a good idea to draw a logarithmic frequency axis.
Note to the Bode diagram: the designation of this diagram type of course requires that you have set a logarithmic output ratio. A linear setting produces still a diagram of the quotient of the output and the input magnitude but this is not a Bode diagram by definition.

Internally, all calculations are performed with double-precision. The decimal setting therefore has only an effect on the display values in the table and in the views for displaying and editing the circuit. The switch "fixed" fills the displayable decimal places with as many zeros as you've specified the number of decimal places, if it is enabled.

Using the toolbar, you have the following functions:

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Last changed: February 2, 2015 2:51 AM