niScope Cal Store Internal Reference

NI High-Speed Digitizers Help (NI-SCOPE)

Edition Date: January 2017

Part Number: 370592AB-01

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For the NI 5112, this VI allows you to store the measured internal reference voltage value.

The NI 5112 supports routing the internal reference to the front BNC connectors, using niScope Cal Route Internal Reference . You can measure the internal reference with a DMM to verify it is within specification, then call this VI to store the measured value in the EEPROM. Storing the internal reference allows you to track the drift of the internal reference over time. The reference value is stored for tracking purposes only, and is not used during digitizer operation. The reference value is stored in the EEPROM as a 32-bit floating point number.

This VI requires an instrument handle returned from niScope Cal Start. The reference value is not written to the EEPROM until niScope Cal End is called with action set to Store Calibration. If this VI is not called during an external calibration session, the internal reference value is set to zero in the EEPROM when niScope Cal End is called with action set to Store Calibration. This process ensures consistent calibration count, date, and internal reference values in the EEPROM.

niScope Cal Store Internal Reference

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instrument handle is the instrument handle that you obtain from niScope Cal Start. The handle identifies a particular instrument session.

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which reference specifies which reference to store, fetch, or route.

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internal reference is the value of the internal reference stored during the last external calibration.

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error in describes error conditions that occur before this node runs. This input provides standard error in functionality.

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instrument handle out has the same value as the instrument handle.

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error out contains error information. This output provides standard error out functionality.

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