> For the complete documentation index, see [llms.txt](https://docs.ndi.video/all/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.ndi.video/all/developing-with-ndi/ndi-certified/certification-process/testing-methods/ndi-controller.md).
# NDI Controller
1. Check for [Interoperability](/all/developing-with-ndi/ndi-certified/certification-guidelines/interoperability-requirements.md) first. As it will not generate an NDI signal, it will not have an option such as multicast, but it must be able to work in a multicast environment
2. There are no stated performance metrics for delay between control and movement, but it shouldn’t feel “slow” or have a delay between controller and movement.
{% hint style="warning" %}
Some controllers have a "deadzone" which may impact the “feel".
{% endhint %}
3. If the controller has an on-display monitor or can output to a monitor, run the test as a Decoder from above.
---
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