External modulation for ________ modulation format allows the most sen – McqOptions

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1.	External modulation for ________ modulation format allows the most sensitive coherent detection mechanism.
A.	FSK
B.	DSK
C.	PSK
D.	ASK
Answer» D. ASK

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The digital transmission on implementation of polarization modulation which involves polarization characteristics of the transmitted optical signal is known as _____________
_________ can potentially provide spectral conservation through the use of multilevel signalling.
External modulation for ________ modulation format allows the most sensitive coherent detection mechanism.