Sidechain question

I’d like to better understand the Side Chain found in the on board Channel Strip. Everything I can found about Side Chain talks about Side Chain Compressors where the compressor references a different track as its trigger…but there really is no way (that I can see) for you to chose one of the other channels as such. The controls appear to be just one more parametric EQ band. Can anyone help me understand its function? Thanks

You talk about Cubase? Your topic is under hardware and UR-C series!

No, I’m talking about the UR-22C. It has the on board channel strip with compressor, EQ…and this Side Chain.

You can make it react to certain frequency.