Using RF List Mode

NI RF Vector Signal Analyzers (NI-RFSA 18.1) Help

Edition Date: June 2018

Part Number: 372058U-01

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An RF configuration list is composed of configuration list steps. Each step specifies the state of the instrument by specifying values for attributes/properties. Out of all available attributes, select only those that you want to set from step-to-step and add them to the list.

To use the RF list mode, complete the following steps:

  1. Create the list. To create the RF configuration list, call the niRFSA Create Configuration List VI or the niRFSA_CreateConfigurationList function. When you call this VI or function, pass the array of properties or attribute IDs that you intend to change between configuration list steps. When the set as active list or setAsActiveList parameter is set to TRUE, the newly created list is set as the active configuration list.
  2. If in the previous step you did not specify the active configuration list, do so now using the Active Configuration List property or the NIRFSA_ATTR_ACTIVE_CONFIGURATION_LIST attribute. The active configuration list also specifies whether NI-RFSA operates using the RF list mode.
  3. Typically, next you immediately populate the steps that make up that list. (Initially, the list has no steps.) To create the configuration steps, call the niRFSA Create Configuration List Step VI or the niRFSA_CreateConfigurationListStep function. When set as active step or setAsActiveStep is set to TRUE (which is the default), the newly created step becomes the active configuration list step.
  4. If in the previous step you did not specify the active configuration list step, do so now using the Active Configuration List Step property or the NIRFSA_ATTR_ACTIVE_CONFIGURATION_LIST_STEP attribute. Initially, this configuration list step contains the driver default values for each configuration list property that you specified in the niRFSA Create Configuration List VI or the niRFSA_CreateConfigurationList function. Now, while this step is active, use the property node or one of the set attribute functions to change the default values of those properties and attributes.
    Note Note  Configuration list steps are zero-based and numbered in the order in which you created them for the active list. List execution always starts with step zero.
  5. To start RF list mode operation, call the niRFSA Initiate VI or the niRFSA_Initiate function. After initiate, the device starts executing the list as indicated by the Active Configuration List property or the NIRFSA_ATTR_ACTIVE_CONFIGURATION_LIST attribute. If you set the active list to "", the NI-RFSA device operates without using RF list mode.
  6. The RF configuration list advances at the end of each record, and the Ready for Advance Event waits for the device to settle in the new configuration; therefore, each record has a corresponding list step. If there are more records than list steps, the list steps advance from the last step to step zero. For example, if you have 10 records and five steps, records five through nine are acquired with list steps zero through four. This also applies to infinite records.
Note Note  For the PXIe-5663E/5665/5667, RF list mode requires at least one available PXI backplane trigger for synchronization between the RF vector signal analyzer modules. For more information about routing signals from the PXI backplane to the installed devices, refer to Signal Routing.

Related Topics

Open-Loop and Closed-Loop Use Cases—Refer to this topic for information about using RF list mode with open-loop and closed-loop use cases.

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