Minimum Radar Vector Altitude protection?

[Weary]

Simple question;

A transponding aircraft is subject to an approach control service and is generating a mode C return on the radar display. IF, for whatever reason, he descends below the minimum assignable radar vector altitude for his position, will there be any bells, lights, whistles or whatever generated by the radar hardware/software independent of any ATC intervention?

Thanks in advance.

Weary