input signal vs signaling

input signal and signaling both are nouns.

Word	Noun	Adjective	Verb	Adverb
input signal	Yes	No	No	No
signaling	Yes	No	No	No

As nouns, signaling is a hypernym of input signal; that is, signaling is a word with a broader meaning than input signal:

Other hypernyms of input signal include sign, signal, signalling.

input signal (noun)	signaling (noun)
signal going into an electronic system	any nonverbal action or gesture that encodes a message