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SLiCAP LTspice
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Install and configure LTspice for schematic capture
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If you want to use LTspice as schematic capture program you also need to install and/or configure LTspice as schematic capture program for SLiCAP. To this end you need to:

#. Install the latest version of `LTspice <http://www.analog.com/en/design-center/design-tools-and-calculators/ltspice-simulator.html>`_
#. Start LTspice
#. On the menu bar click *Tools > Control Panel*. This will bring up the LTspice control panel:

   .. image:: ../img/LTspiceControlPanel.png

#. On this control panel select the *Netlist Options* tab and select the options as shown below:

   .. image:: ../img/LTspiceControlPanelNetlistOptions.png

#. Then select the *Sym. & Lib. Search Paths* tab and enter the full path to the "LTspice" subdirectory of your SLiCAP install path. This directory contains all the SLiCAP symbol definitions ('.asy' files) for LTspice:

   .. image:: ../img/LTspiceControlPanelSymbolPath.png

#. Then select the *Drafting Options* tab and change the font size and deselect the "Bold" checkbox as shown below. If you want, you can also select different colors for your schematics.

   .. image:: ../img/LTspiceControlPanelFontSettings.png

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Draw the circuit in LTspice
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Knowledge of drawing circuits with LTspice is assumed.

#. Open LTspice and select *File > New Schematic* from the menu bar. Place a component on the schematic by clicking the AND gate symbol on the tool bar or by pressing the "F2" key (default Hot Keys setting). This will bring up the *Select Component Symbol* menu. On this menu select the directory with the SLiCAP symbols from *Top Directory* drop-down select box, as shown below:

   .. image:: ../img/LTspiceSelectSLiCAPcomponent.png

   All SLiCAP symbol names start with "SL"! 

#. Place an independent voltage source "SLV", a resistor "SLR" and a capacitor "SLC" and create the circuit depicted below:

   .. image:: ../img/myFirstRCnetwork_asc.png
       :width: 400px

   Please note:

   #. The node of interconnection of the resistor and the capacitor is labeled as *out*. Later we need to refer to this node. SLiCAP will name the voltage at this node *V_out*.
   #. A default ground symbol (node *0*) has been used.
   #. The use of the spice directive *.param*: it defines symbolic or numeric values of parameters.

#. Save the circuit *myFirstRCnetwork.asc* in the project directory.

#. If you want to display the circuit on a SLiCAP output html page, you need to create an image file of it that can be rendered by a browser. A *.png* file is a good candidate. You can generate a PNG from a screen dump with a graphic file editor (Paint, Gimp, Photoshop, etc.). Here we assume that the graphic file *myFirstRCnetwork_asc.png* has been saved in the project directory. It is shown above.