Explore topic-wise MCQs in Digital Communications.

This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Communications knowledge and support exam preparation. Choose a topic below to get started.

1.

The number of filters in CPM receiver structure is

A. LM
B. ML
C. M/L
D. None of the mentioned
Answer» C. M/L
Discussion
2.

CPM has

A. Narrower bandwidth
B. Wider bandwidth
C. More bandwidth requirement
D. None of the mentioned
Answer» B. Wider bandwidth
Discussion
3.

Continuous phase modulation has

A. More bandwidth efficiency
B. More smoothness
C. More bandwidth efficiency & smoothness
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
4.

What is the function of the edge detector?

A. Differentiation
B. Rectification
C. Differentiation & Rectification
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
5.

WHAT_IS_THE_FUNCTION_OF_THE_EDGE_DETECTOR??$

A. Differentiation
B. Rectification
C. Differentiation & Rectification
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
6.

CPM has$

A. Narrower bandwidth
B. Wider bandwidth
C. More bandwidth requirement
D. None of the mentioned
Answer» B. Wider bandwidth
Discussion
7.

Continuous_phase_modulation_has$

A. More bandwidth efficiency
B. More smoothness
C. More bandwidth efficiency & smoothness
D. None of the mentioned
Answer» D. None of the mentioned
Discussion
8.

The_number_of_filters_in_CPM_receiver_structure_is

A. LM
B. ML
C. M/L
D. None of the mentioned
Answer» C. M/L
Discussion
9.

To avoid the loop to be driven to lock, the sweep rate should be

A. Smaller
B. Larger
C. It does not depend on it
D. None of the mentioned
Answer» B. Larger
Discussion
10.

Acquisition is a ______ operation.

A. Linear
B. Non linear
C. Linear & Non linear
D. None of the mentioned
Answer» C. Linear & Non linear
Discussion
11.

When phase noise and phase jitter is doubled, the phase variance increases by

A. Two times
B. Four times
C. 0.5 times
D. 8 times
Answer» C. 0.5 times
Discussion
12.

A cycle slip occurs when the magnitude of the original phase error exceeds

A. Π radians
B. 2π radians
C. π/2 radians
D. π2 radians
Answer» C. ‚âà√¨‚àö√ë/2 radians
Discussion
13.

PLL designs have

A. First order loop
B. Second order loop
C. Higher order loop
D. None of the mentioned
Answer» C. Higher order loop
Discussion
14.

In VCO the output frequency is a linear function of its input

A. Frequency
B. Voltage
C. Time period
D. None of the mentioned
Answer» C. Time period
Discussion
15.

Phase locked loops consists of

A. Phase detectors
B. Loop filter
C. Voltage controlled oscillator
D. All of the mentioned
Answer» E.
Discussion