Principles of communication Questions

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 channe...

A single of 5 kHz frequency is amplitude modulated on a carrier wave of frequency 2 MHz. The frequencies of the resultant signal is/are -

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modul...

A signal wave of frequency 12 kHz is modulated with a carrier wave of frequency 2.51 MHz. The upper and lower side band frequencies are respectively :-

In ionospher maximum ion density is 106 ion/cm3 What is the frequency from following for which the sky wave propogation is obtained :-

Which is used as light source in optical fibre communication -

Wireless communication across english channel is achived by -

A TV tower have height of 20m what is maximum linear distance from TV tower for which TV signal reception is possible :-

A diode detector is used to detect an amplitude modulated wave of 60% modulation by using a condenser of capacity 250 pico farad in parallel with a load resistance 100 kilo ohm. Find the maximum modul...

For 100% modulation (AM), the useful part of the total power radiated is

Which is the advantages of optical fibre communication :-

12 signals each band limited to 5kh are to be transmitted by frequency -division multiplexer. If AM-SSB modulation guard band od 1kHz is used then the bandwidth of multiplexed single is...

Communication on ground is through electromagnetic waves of wavelength

In communication with help of antenna if height is double then the range covered which was initially r would become

If the highest modulating frequency of the wave is 5kHz, the number of stations that can be accomdated in a 150 kHz bandwidth are

The circuit shown below acts as :

For sky wave propagation of MHz signal, what should be the minimum electron densty in ionosphere?

In short wave communication wave of which of the following frequencies will be reflected back by the ionospheric layer having electron density 1011 per m3 ?...

The maximum distance upto which TV transmission from Tv Tower of height h canreceived is proportional to :

Consider telecommunication through optical fibers. Which of the following statements is not true?