Official PYQ · 2000Set 1 · Q2.20Analog CommunicationsMCQ1 mark

GATE EC 2000 Set 1 Q2.20 — Analog Communications

In an $\text{FM}$ system, a carrier of $100\; \mathrm{MHz}$ is modulated by a sinusoidal signal of $5 \; \mathrm{kHz}$ . The bandwidth by Carson's approximation is $1 \; \mathrm{MHz}$ . If $y(t)=(\text{modulated waveform})^{3}$ , then by using Carson's approximation, the bandwidth of $y(t)$ around $300 \; \mathrm{MHz}$ and the spacing of spectral components are, respectively.

View answer

Answer: D

Worked explanation not available yet.

Free practice · Your answers on this page are not saved.

Published 10 Oct 2026

Report a correction

GATE EC · 2026Analog Communications
Which option(s) represents/ represent the dielectric loss tangent of a substrate?
MSQ · 1 mark
GATE EC · 2026Analog Communications
Consider a real, narrowband signal $x(t)=A(t) \cos \left[2 \pi f_{c} t+\theta(t)\right]$ where the maximum frequency components of $A(t)$ and $\theta(t)$ are $f_{M}$ and $f_{c}\left(=1000 f_{M}\right)$ , respectively. Which of the following statements is/are correct for $-\infty < t < \infty ?$
MSQ · 2 marks
GATE EC · 2025Analog Communications
Consider a frequency-modulated (FM) signal $f(t)=A_{c} \cos \left(2 \pi f_{c} t+3 \sin \left(2 \pi f_{1} t\right)+4 \sin \left(6 \pi f_{1} t\right)\right)$ where $A_{c}$ and $f_{c}$ are, respectively, the amplitude and frequency (in $\mathrm{Hz}$ ) of the carrier waveform. The frequency $f_{1}$ is in $\mathrm{Hz}$ , and assume that …
MCQ · 1 mark
GATE EC · 2025Analog Communications
Consider a message signal $m(t)$ which is bandlimited to $[-W, W]$ , where $W$ is in $\mathrm{Hz}$ . Consider the following two modulation schemes for the message signal: Double sideband-suppressed carrier (DSB-SC): $f_{D S B}(t)=A_{c} \: m(t) \cos \left(2 \pi f_{c} t\right)$ Amplitude modulation (AM): …
MSQ · 1 mark
GATE EC · 2024Analog Communications
An amplitude modulator has output (in Volts) $s(t)=A \cos (400 \pi t)+B \cos (360 \pi t)+B \cos (440 \pi t) .$ The carrier power normalized to $1 \Omega$ resistance is $50$ Watts. The ratio of the total sideband power to the total power is $1 / 9$ . The value of $\text{B}$ (in Volts, rounded off to two decimal places) is $\_\_\_\_\_\_\_$ .
NAT · 1 mark
GATE EC · 2023Analog Communications
Let a frequency modulated $\text{(FM)}$ signal $x(t)=A \cos \left(\omega_{c} t+k_{f} \int_{-\infty}^{t} m(\lambda) d \lambda\right)$ , where $m(t)$ is a message signal of bandwidth $\text{W.}$ It is passed through a non-linear system with output $y(t)=2 x(t)+5(x(t))^{2}$ . Let $B_{T}$ denote the $\text{FM}$ bandwidth. The minimum value of …
MCQ · 2 marks

Browse this topic

More Analog Communications questions

GATE EC 2000 Set 1 Q2.20 — Analog Communications

Related questions