Embibe Experts Solutions for Chapter: Communication Systems, Exercise 1: COMEDK UGET 2014

A TV tower is $120 \mathrm{m}$ high. How much more height is to be added to it, if its coverage range is to become double?

The wireless communication frequency bands for Cellular Mobile Radio (mobile to base station) are in the range of

A repeater in $T.V.$ transmission is

The increase in the height of the tower of height $200 \mathrm{m}$ to get its coverage range tripled is

The T.V. signals have a bandwidth of $3.7 \mathrm{Mhz}.$ The number of T.V. channels that can be accommodated with a band of $3700 \mathrm{GHz}$ is

The waves suitable for transmission of radio signals are

A message signal of frequency $10 \mathrm{kHz}$ and peak value of $10 \mathrm{volts}$ is used to moderate a carrier of frequency $1 \mathrm{MHz}$ and peak voltage $20 \mathrm{volts}.$ The modulation index and side bands produced are