Logarithm

Logarithm
The Logarithm I/O calculates the logarithm of the input data. The base number and a gain can be set.

A typical application of the Logarithm I/O is to create a vertical axis in dB in the oscilloscope or spectrum analyzer.

Properties

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.

Gain

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.

Base

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.

Common properties and actions

Related information

Gain/Offset

The Gain/Offset I/O multiplies a signal with a constant gain factor and adds a constant offset.

Add/Subtract

The Add/Subtract I/O adds or subtracts data of two or more sources.

Multiply/Divide

The Multiply/Divide I/O multiplies or divides data of two ore more sources.

Sqrt

The SQRT I/O calculates the square root of each sample of the source's data.

ABS

The ABS I/O takes the absolute value of each sample of the source's data.

Differentiate

The Differentiate I/O differentiates the source's data.

Integrate

The Integrate I/O integrates its source's data.