差動 さどう位相 いそう偏移 へんい変調 へんちょうではありませんでした
sadōisōhen'ihenchōdewa arimasendeshita

Noun
Desu Copula

The polite, past negative form of 差動位相偏移変調

1. Was not differential phase-shift keying.; Was not differential phase modulation.

Past/Perfective
Negative
Polite
Formal Register
Computing