"The signal exiting the band-pass filter has a 100 kHz carrier, which is modulated such that the amplitude represents the TM position."
Is "such" used correctly above? I don't think so.
"Modulated in such a way that" is what I'd write.
Please read the usage note here: such - definition of such by the Free Online Dictionary, Thesaurus and Encyclopedia..
This “such that” construction, according to the grammarian George O. Curme, is evidence of an “older English fondness for double expression,” with “such and that pointing as with two index fingers to the following explanatory clause.”
The word “such” in sentences like these can have either of two meanings:
(1) “of such a kind” (adjective). As in “Her illness was such that she couldn’t work.”
(2) “in such a way” (adverb). As in “She trembled such that she couldn’t work.”