EC 8651- communication systems lab-mcq

1. Is PAM analog or digital modulation

• Analog

• Digital

2. What modulation is used to transmit audio signal

• AM

• FM

What is the compression techniques used for audio signals?

• A - law and Mu law

• Q-law and S- Law

4. What is the application of DPCM?

• Modulation and Compression

• Modulation and Detection

What are the drawbacks of Delta modulation?

• Granular and Intersymbol noise

• Slope overload and Granular noise

What is the expression for SNR of PCM

• 4.8 +6 n dB

• 5+6n

How is ISI measured

• eye pattern

• detector and correlative receiver

ISI is added to improve bandwidth

• True

• False

Duobinary is a type of _______coding

• Block

• Correlative coding

What is the kind of modulation in QAM

• Amplitude

• amplitude and phase