位相 いそう偏移 へんい変調 へんちょうじゃなかったです
isō hen'ihenchōjanakattadesu

Noun
Desu Copula

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

1. Wasn't phase-shift keying.; Wasn't a phase shift modulation.

Past/Perfective
Negative
Polite
Casual Register
Computing