Qu-24 to DX168

i connect the d-snake from qu24 to the DX168 but unfortunately i can’t see the DX168 on the Qu and i got no signal anyone can help me please?

The DX168 is not compatible with a QU.
It uses the DX protocol and not dSnake.
You could, for example, connect an AB168 to your QU.

The QU systems run at 48k clock speeds. The DX/GX boxes run at 96k clock speeds and do not have any “reclocking” capabilities. Therefore they only work on systems that also run at 96k clock speeds. You’ll need to select stage boxes that are compatible with the QU series (which are the older 48k boxes). For more information, I suggest you refer to the “I/O Everything” page on the A&H website. Select “QU” as your desired system, and it will show you all of the compatible boxes (AR84, AB168, and AR2412).

https://www.allen-heath.com/hardware/everything-i-o/