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Adjust Main Path Output Impedance Calibration (G Dataflow)

Last Modified: September 16, 2017

Calculates calibration constants pertaining to main analog path output impedance.

During external calibration, you can put the waveform generator in different configurations and take measurements of the resulting output voltage across different loads. Using the configuration data and the measurements, this node calculates the appropriate calibration constants and, when the calibration session is committed, stores them in the onboard EEPROM.

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load impedance

Impedance of the load across which the measurement in the measured voltage across load input is taken.

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configuration

Configuration of the waveform generator for this stage of calibration.

Name Value Description
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_0DB_50OHMS 0 The waveform generator was configured to use the low-gain amplifier path and to 50 Ω output impedance with 0 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_0DB_75OHMS 1 The waveform generator was configured to use the low-gain amplifier path and to 75 Ω output impedance with 0 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_12DB_50OHMS 2 The waveform generator was configured to use the low-gain amplifier path and to 50 Ω output impedance with 12 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_12DB_75OHMS 3 The waveform generator was configured to use the low-gain amplifier path and to 75 Ω output impedance with 12 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_24DB_50OHMS 4 The waveform generator was configured to use the low-gain amplifier path and to 50 Ω output impedance with 24 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_24DB_75OHMS 5 The waveform generator was configured to use the low-gain amplifier path and to 75 Ω output impedance with 24 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_36DB_50OHMS 6 The waveform generator was configured to use the low-gain amplifier path and to 50 Ω output impedance with 36 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_LOW_GAIN_36DB_75OHMS 7 The waveform generator was configured to use the low-gain amplifier path and to 75 Ω output impedance with 36 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_0DB_50OHMS 8 The waveform generator was configured to use the high-gain amplifier path and to 50 Ω output impedance with 0 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_0DB_75OHMS 9 The waveform generator was configured to use the high-gain amplifier path and to 75 Ω output impedance with 0 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_12DB_50OHMS 10 The waveform generator was configured to use the high-gain amplifier path and to 50 Ω output impedance with 12 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_12DB_75OHMS 11 The waveform generator was configured to use the high-gain amplifier path and to 75 Ω output impedance with 12 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_24DB_50OHMS 12 The waveform generator was configured to use the high-gain amplifier path and to 50 Ω output impedance with 24 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_24DB_75OHMS 13 The waveform generator was configured to use the high-gain amplifier path and to 75 Ω output impedance with 24 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_36DB_50OHMS 14 The waveform generator was configured to use the high-gain amplifier path and to 50 Ω output impedance with 36 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_HIGH_GAIN_36DB_75OHMS 15 The waveform generator was configured to use the high-gain amplifier path and to 75 Ω output impedance with 36 dB postamplifier attenuation.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_DIFFERENTIAL 16 The waveform generator was configured for differential output.
NIFGEN_VAL_CAL_CONFIG_MAIN_PATH_RSE 17 The waveform generator was configured for referenced single-ended output.
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session in

Handle that identifies your instrument session previously allocated by Initialize External Calibration.

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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

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channel name

Name of the waveform generator channel that the node uses.

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measured source voltage

Analog output voltage measured across a very high-impedance load.

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measured voltage across load

Analog output voltage measured across the load impedance specified in the load impedance input.

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session out

Reference to your instrument session to wire to the next node.

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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


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