I know how to use relative clause in reduced form i.e. I saw the dog barking.(I saw the dog which barked)
But in a technical book, I see the following sentence and can't figure out.
This function performs some action appropriate to the condition that generated the signal
I think that the author forgot to put is before the signal. If not, is there any usage form like that + past participle? Or, what is the usage of that here? Can you rewrite the sentence with same meaning? Is generated past simple here?