# Amplitude Measurements (AC DC and RMS » Basic Continuous) (G Dataflow)

Calculates continuous AC, DC, and RMS values of a signal.  ## reset

A Boolean that specifies the initialization of the internal state of the node.

 True Initializes the internal state to zero. False Initializes the internal state to the final state from the previous call of this node.

This node automatically initializes the internal state to zero on the first call and runs continuously until this input is True.

Default: False ## signal

The input signal.

This input can be a waveform or an array of waveforms. ## averaging type

Type of averaging to apply to the signal.

Name Description
Linear Applies linear averaging to the signal.
Exponential Applies exponential averaging to the signal.

Default: Linear ## window type

Type of window to apply to the signal when you use linear averaging.

Windowing can help increase measurement accuracy for signals that are dominated by periodic components.

Name Description
Rectangular (none) Does not apply a window.
Hanning Applies a Hanning window.
Low side lobe Applies a low side lobe window.

Default: Rectangular (none) ## error in

Error conditions that occur before this node runs.

The node responds to this input according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error  If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Default: No error ## AC value

AC value of the signal.

This output can return a double-precision, floating-point number or a 1D array of double-precision, floating-point numbers. ## DC value

DC value of the signal.

This output can return a double-precision, floating-point number or a 1D array of double-precision, floating-point numbers. ## RMS value

Root mean square value of the signal.

This output can return a double-precision, floating-point number or a 1D array of double-precision, floating-point numbers. ## error out

Error information.

The node produces this output according to standard error behavior.

Standard Error Behavior

Many nodes provide an error in input and an error out output so that the node can respond to and communicate errors that occur while code is running. The value of error in specifies whether an error occurred before the node runs. Most nodes respond to values of error in in a standard, predictable way.

error in does not contain an error error in contains an error  If no error occurred before the node runs, the node begins execution normally.

If no error occurs while the node runs, it returns no error. If an error does occur while the node runs, it returns that error information as error out.

If an error occurred before the node runs, the node does not execute. Instead, it returns the error in value as error out.

Where This Node Can Run:

Desktop OS: Windows

FPGA: DAQExpress does not support FPGA devices

Web Server: Not supported in VIs that run in a web application