Open-Loop and Closed-Loop Use Cases

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

Edition Date: June 2018

Part Number: 372058U-01

»View Product Info
Download Help (Windows Only)

The ability to specify the source for the Advance trigger allows you to use RF list mode with open-loop and closed-loop use cases. These use cases are described in the following sections.


In the open-loop case, the RF device advances through the RF configuration list based on a user-defined time-specification for each step. Open loop use cases use internal events, like a timer interval based on a hardware timer internal to the RF device, to move through the configuration list.


In the closed-loop case, the RF device and the device under test exchange signals along trigger lines to advance through the configuration list. Generally, the closed-loop case assumes that the RF device uses external signals, namely triggers, to advance through the frequency list and that the RF device can produce events as it moves to each step in the RF configuration list.

Related Topics

Signal Routing—Refer to this topic for information about how to establish trigger and event routes.

Using RF List Mode


Not Helpful