# IviCounter Configure Frequency Ratio (G Dataflow)

Version:
Last Modified: October 24, 2017

Configures the IviCounter Frequency Ratio Estimate and IviCounter Frequency Ratio Resolution properties for a frequency ratio measurement.

## denominator channel ("")

Specifies the name of the denominator channel to configure. The driver sets the IviCounter Frequency Ratio Denominator Channel property to this value. Users who want to achieve interchangeability should use a virtual channel name. The virtual channel name should be sufficiently specific to the test system such that it is unlikely to conflict with a physical channel name. Default Value: "" Notes: You can specify the denominator channel name as a string variable or as a literal enclosed in double quotes.

## instrument handle

The instrument handle you obtain from the IviCounter Initialize node or IviCounter Initialize With Options node. The handle identifies a particular instrument session.

Default: 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

## numerator channel ("")

Specifies the name of the numerator channel to configure. The driver sets the IviCounter Frequency Ratio Numerator Channel property to this value. Users who want to achieve interchangeability should use a virtual channel name. The virtual channel name should be sufficiently specific to the test system such that it is unlikely to conflict with a physical channel name. Default Value: "" Notes: You can specify the numerator channel name as a string variable or as a literal enclosed in double quotes.

## numerator frequency estimate (100 MHz)

Specifies the estimated measurement frequency for the numerator of the frequency ratio. The driver sets the IviCounter Frequency Ratio Numerator Frequency Estimate property to this value. Units: hertz Default Value: 1.0E8

## estimate (1.0)

Specifies the estimated frequency ratio measurement. The driver sets the IviCounter Measurement Frequency Ratio Estimate property to this value. Default Value: 1.0

## resolution (0.01)

Specifies the resolution of the frequency ratio measurement. It is the quantization size, i.e. the smallest delta value that can be detected. The driver sets the IviCounter Frequency Ratio Resolution property to this value. Default Value: 0.01

## instrument handle out

The instrument handle you obtain from IviCounter Initialize or IviCounter Initialize With Options. The handle identifies a particular instrument session.

Default: None

## 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: Not supported

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