Carrier frequency and band width of a signal is `5.4 MHz` and `90 kHz` respectively. How many channels are there ?

How is amplitude modulation achieved ? (b) The frequencies of two side bands in an AM weve are 640 kHz and 660 kHz respectively. Find the frequencies of carrier and modulating signal. What is the bandwidth required for amplitude modulation ?

A telephonic communication service is working at carrier frequency of 10 GHz. Only 10% of it is utilized for transmission. How many telephonic channels can be transmitted simultaneously if each channel requires a bandwidth of 5 kHz ?

Consider an optical communication system operating at lambda=800 nm . Suppose, only 1% of the optical source frequency is the available channel bandwidth for optical communication. How many channels can be accommondated for transmitting audio signals requiring a bandwidth of 8kHz

Statement-1: A message signal of frequency 1 KHz modulate with carrier signal of frequency 1 MHz bandwidth of modulated signal is 2KHz Statement-2: Maximum and minimum frequency of the modulated signal are 1002 KHz and 998 KHz respectively

The frequency of signals up to 1.5 MHz can be propagated using

Audio sine waves of 3 kHz frequency are used to amplitude modulate a carrier signal of 1.5 MHz. Which of the following statements are true?

An optical communication system, having an operating wavelength, lambda (in meters), can use only x% of its sourcefrequency as its channel band width.The system is to be used for transmitting TV signal requiring a band width of F hertz. How many channels can this system transmit simultaneously?

An optical communication system, having an operating wavelength, lambda (in meters), can use only x% of its sourcefrequency as its channel band width.The system is to be used for transmitting TV signal requiring a band width of F hertz. How many channels can this system transmit simultaneously?

Optical communication system having an operating wavelength lambda metre can use only x % of its source frequency as its channel band width. The system is to be used for transmitting T.V signals requiring a band width of F hertz. How many channels can this system transmit simultaneously? Show graphically how this number of channels varies with operating wavelength of the system.

Three waves A , B and C of frequencies 1600kHz , 5MHz and 60 MHz , respectively are to be transmitted from one place to another. Which of the following is the most appropriate mode of communications: