# Differentiate The Differentiate I/O differentiates the source's data. The output is proportional to rate of change of the input. For example, if a source has the unit V, the output of the DIFF will have unit V/s. The output range can be changed and fixed to user defined values.

The typical application of the Differentiate I/O is to use it as part of larger, more complex mathematical operations.

Hint: The differentiate operation is very sensitive to noise, because noise in most cases has a higher frequency than the signal of interest. To minimize the effect of noise, add a low-pass filter processing block before or after the differentiate block. In case you are measuring a periodic triggered signal, you can also use an average I/O, which will give better results than filtering.

## Common properties and actions

To control the behavior of the Differentiate 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. ### Related information

#### Gain / Offset

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

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.

#### Integrate

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

#### Logarithm

The Logarithm I/O calculates the logarithm of the source's data.

#### Average

The Average I/O averages successive measurements and outputs the average of these measurements.

#### Low pass filter

The Low pass filter I/O filters the source's data using a first order low pass filter.