A typical application of the Logarithm I/O is to create a vertical axis in dB in the oscilloscope or spectrum analyzer.
To control the behavior of the Logarithm I/O, several properties are available. These can be accessed through a popup menu which is shown when the I/O is right clicked in the Object Tree. The properties can also be accessed through its settings window which is shown when the I/O is double clicked in the Object Tree. To open the Object tree, click the Show object tree button.
The Gain property sets the gain of the Logarithm I/O. Commonly used gain factors of 1, 10 and 20 are available, as well as a user defined setting. The default value for the gain is 20.
The Base property sets the base number of the logarithm calculation. Commonly used base numbers of 2, e and 10 are available, as well as a user defined setting. The default value for the base number is 10.