Ni-scope 18.1 known issues – national instruments electricity explained

• Issue ID – The number in at the top of each of the cells in the first column. When you report an issue to NI, you may be given this ID, you can also find IDs posted by NI on the discussion forums or in Knowledge Base articles. "N/A" indicates that there is no ID assigned to the issue.

• Problem Description – A few sentences which describe the problem in further detail. The brief description given does not necessarily describe the problem in full detail, and it is expected that you may want more information on an issue. If you would like more information on an issue, contact NI and reference the ID number given in the document.

• Workaround – Possible ways to work around the problem. The workarounds that appear in the document are not always tested by NI and are not guaranteed to resolve the issue. If a workaround refers you to the NI KnowledgeBase, visit and enter the KnowledgeBase number in the search field to locate the specific document.

• Reported Version – The earliest version of NI-SCOPE in which the issue was reported. If you discover the issue appears in an earlier version of NI-SCOPE than is reported in this field, report the discrepancy to NI to have the field updated.

When the system boots, the NI PXIe 5185/5186 performs a power-up calibration procedure. If the system is forced to hibernate/sleep while the power-up calibration is in progress, you will have to wait until the calibration is complete before the system can be brought out of hibernation. The LEDs on the PXIe 5185/5196 turn green once power-up calibration is complete.

If an NI PXIe 5185/5186 is in the process of calibrating to a clock source and MAX requests a device reset, MAX must wait until the clock source calibration is complete and will be unresponsive. Clock source calibration can take several minutes.

When using TClk synchronization where two or more NI 5622 acquire at different I/Q rates with DDC enabled, it is possible for the acquired data to be misaligned. The misalignment manifests itself as a skew where the data from one device appears to be leading/lagging the data from the other device. The time delay between the data acquired by the master and a slave is constant for the combination of the hardware settings configured on the two devices. This skew is repeatable and does not vary with time.

Workaround: Dynamic mode is enabled by default in the LabVIEW FPGA Module 2010. To disable Dynamic mode, complete the following steps: 1. Place the Open FPGA VI Reference function on the LabVIEW block diagram. 2. Right-click the function and select Configure Open FPGA VI Reference. 3. Remove the checkmark from the Dynamic mode listbox.

Workaround: If you require support for more than one version of LabVIEW, complete the following steps: Install Traditional NI-DAQ (Legacy)(included in the NI-SCOPE installer). Restart the system. Copy the following folders from the latest version of LabVIEW to the folder of the older version of LabVIEW. [LVDIR] indicates the folder of the latest LabVIEW version. [LVDIR]\vi.lib\daq [LVDIR]\examples\daq [LVDIR]\help\lvdaq.chm [LVDIR]\menus\default\daq You should now be able to use Traditional NI-DAQ (Legacy) with both versions of LabVIEW. The Traditional NI-DAQ (Legacy) API is mass-compiled in LabVIEW 7.0. This will not affect the functionality of your VIs. However, LabVIEW will prompt you to save the Traditional NI-DAQ (Legacy) subVIs if your LabVIEW version is greater than 7.0. To avoid the prompts, mass-compile the folders referenced above. If you require Traditional NI-DAQ (Legacy) support for earlier versions of LabVIEW, you need an earlier version of Traditional NI-DAQ (Legacy).

Workaround: To update firmware, run the Firmware Updater application from one of the following locations: Windows XP and Windows 7/Vista 32-bit: C:\Program Files\National Instruments\NI-DAQ\fpgafiles\ni5122\NI PXIe-5122 Firmware Updater.exe. Windows 7 64-bit/Vista 64-bit: Program Files (x86)\National Instruments\NI-DAQ\fpgafiles\ni5122\NI PXIe-5122 Firmware Updater.exe. This application will upgrade your firmware to the latest available version that works with this driver. After the application has finished running, you will be required to power down your computer and PXIe chassis to complete the firmware update. For more information on installing firmware updates, refer to KnowledgeBase 4MJGCSAY at

If you need to downgrade the current version of NI-SCOPE to NI-SCOPE 2.1.4 or earlier, you must uninstall the current versions of NI-SCOPE and NI-DAQmx before installing the older version of NI-SCOPE. After the older version of NI-SCOPE is installed, you can then reinstall NI-DAQmx.

Using NI-SCOPE, you can now read data as soon as it is acquired. However, on a single record acquisition, the fetch functions do not wait for the trigger holdoff to expire. If you configure a trigger holdoff on a single record acquisition on NI 5112 devices, you must make sure the trigger holdoff period has expired before initiating another acquisition.

When using an NI 5122, to change the rate of the external clock within the same session, you need to first change the rate by setting the Sample Clock Timebase Rate attribute, then change the rate of your source, then call the function niScope_Commit. If you change the rate of the source before setting the attribute, you may get an error.

When the DDC Enabled property or the NISCOPE_ATTR_DDC_ENABLED attribute is set to True, there are certain configurations for which shared triggers cannot be TClk synchronized. For all cases, it is assumed that the DDC is enabled. If the DDC is not enabled, there are no restrictions on TClk synchronization.

Upgrading the version of Windows on a system with this driver installed may result in the loss of device names, the loss of device configuration, and/or devices appearing disconnected. For more information about how to resolve this issue, visit and enter the Info Code excrxm.

Contact NI regarding this document or issues in the document. If you contact NI in regards to a specific issue, reference the ID number given in the document. The ID number contains the current issue ID number as well as the legacy ID number (use the current ID number when contacting NI). You can contact us through any of the normal support channels including phone, email, or the discussion forums. Visit the NI Website to contact us. Also contact us if you find a workaround for an issue that is not listed in the document.