In ________,The Two Binary Values Are Represented by Two Different

Multiple Choice

In ________,the two binary values are represented by two different amplitudes of the carrier frequency.Commonly,one of the amplitudes is zero.One binary digit is represented by the presence,at constant amplitude,of the carrier,the other by the absence of the carrier.

A) amplitude shift keying
B) phase shift keying
C) frequency shift keying
D) high density bipolar-3 zeros