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DEFINE QUCS DATASET HOW TO
DEFINE QUCS DATASET MANUAL
DEFINE QUCS DATASET SIMULATOR

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DEFINE QUCS DATASET SIMULATOR

The syntax of variable names created by the ”Qucs” simulator is as specified in table 1.Please note that all voltages and currents in“Qucs”are peak values except the noise voltagesand currents which are RMS values at 1Hz bandwidth.

User defined variable names consist of a letter, followed by any number of letters, digits,or underscores. In functions, commas are used to separate arguments. Only the “1” is marked,ġ Ctrl + C means that you have to press the Ctrl key and the C key simultaneously.įunction names, variable names, and constant names are all case sensitive in measurementexpressions - it is distinguished between lowercase and uppercase letters such as ’a’ and’A’. Then type in a new name for it and finalise yourinputs with the Enter key.Īfter that, you can enter a new equation. Simply click onto“Eqn1”, which becomes highlighted. You can now manipulate the current name of the equation instance. Thus, the excerpt of your schematic surface looks like that in fig. Press the Esc key if you do not like further equations.Īnother option is to select an existing equation, copy it (either by menu item “Edit”→”Copy” or by Ctrl + C 1) and paste it (either by menu item “Edit”→ ”Paste” or by CtrlĪfter having successfully created an equation instance, you are now able to modify it.įor sake of simplicity we assume that you have just generated a new equation - if you liketo change an existing, more complicated equation the following steps are the same. Eachmouse click creates a new equation instance each consisting of a variable number of mea-surement expressions. You can now place the equation symbol by mouse click anywhere in the schematic.

Using menu item “Insert”→ ”Insert equation”įigure 1: Entering a new measurement expression via equation icon.

Using the equation icon in the “Tools” bar (see fig.

The related equations can be entered into the schematic editor by the followingmeans: Those new datasets are accessible in the data display tab aftersimulation. Measurement expressions generate new datasets by function or operator driven evaluationof simulation results. It gives a brief description ofthe overall syntax of those expressions.

DEFINE QUCS DATASET HOW TO

The chapter describes the usage of mathematical expressions for post processing simulationdata in “Qucs”, how to enter formulas and modifying them. Finally, the Index contains an alphabetical list of allfunctions. The core of the document, a detailed compilation of all ”Qucs”functions divided into different categories, is presented in chapter “Math Functions” andchapter “Electronics Functions”. Chapter“Functions Syntax and Overview” introduces the basic syntax of functions and a categoricallist of all functions available. Also the data types supported are specified here. If you are not familiar with the way how to enter those formulas, please refer to chapter“Using Measurement Expressions”, which points out the possibilities to create and changemeasurement expressions. The ”Qucs” measurement functions offer a rich set of data manipulationtools. Examples would be the conversion of a simulated voltage waveformfrom volts to dBV, the root mean square value of that waveform or the determination ofthe peak voltage. Measurement expressions come into play whenever the results of a ”Qucs” simulation runneed post processing.

DEFINE QUCS DATASET MANUAL

This manual describes the measurement expressions available in ”Qucs”, the ”Quite Uni-versal Circuit Simulator”.