Recent Lessons

Show all results for ""

Feature Overview

Ace your exams with our all-in-one platform for creating and sharing quizzes and tests.

Quizzes

Create quizzes and tests automatically from your content using AI.

Flashcards

Automatically turn your notes into digital flashcards.

Share, Export & Embed

Share with classmates or export to Excel and your learning management system.

Stats & Reporting

Auto-grading quizzes and tests with detailed stats and reports.

Mobile Apps

The smarter way to study – wherever you are.

Pricing

Search...

Analog Modulation in Communications - Lecture 5

12 Questions

0 Views

Analog Modulation in Communications - Lecture 5

Choose a study mode

Play Quiz

Study Flashcards

Spaced Repetition

Chat to lesson

Podcast

Play an AI-generated podcast conversation about this lesson

Questions and Answers

What is the purpose of modulation for frequency location assignment?

To overcome equipment limitation

To reduce noise and interference

To change the amplitude, frequency, or phase of a signal (correct)

To increase efficiency of radiation

Which type of modulation involves changing a periodic train of pulses in proportion to a message signal?

PPM (correct)

PCM

What is the main difference between Continuous Wave (CW) Modulation and Pulse Modulation?

Frequency range used

Nature of the modulating signal

The number of types of modulation

Presence of periodic train pulses (correct)

What does a modulated signal refer to?

Modulated carrier after modulation Signup and view all the answers

In modulation, what does the term 'modulating signal' refer to?

The information in the required signal Signup and view all the answers

Why is modulation used to transmit a low frequency signal using a high frequency signal?

To change the amplitude, frequency, or phase of the signal Signup and view all the answers

What does the modulation index represent in Amplitude Modulation (AM)?

The ratio of the amplitude of the message to the amplitude of the carrier Signup and view all the answers

In Double-Sideband, Large Carrier (AM/DSB-LC), what remains constant while modulating the carrier signal?

Amplitude and phase of the carrier signal Signup and view all the answers

What is the role of the envelop in Amplitude Modulation (AM)?

To represent the amplitude variation of the modulated carrier Signup and view all the answers

What happens to the frequency and phase of the carrier signal in Single-sideband, suppressed carrier (AM/SSB-SC)?

They remain constant Signup and view all the answers

How is Vestigial-sideband (AM/VSB) different from other types of Amplitude Modulation?

It preserves one complete sideband and a portion of the other sideband Signup and view all the answers

What is the main characteristic that distinguishes Double-Sideband, suppressed Carrier (AM/DSB-SC) from Double-Sideband, Large Carrier (AM/DSB-LC)?

The absence of a carrier signal in DSB-SC but not in DSB-LC Signup and view all the answers