The carrier wave is given by c(t)=2sin(8πt)volts. (1) Sketch the amplitude modulated waveform (2) What is the modulation index? Answer – (1) The modulating signal's amplitude, Am = 1V, can be simply...
Answer – \[3256k{{m}^{2}}\] There is no physical obstruction between the transmitter and the receiver antennae in case of the line-of-sight communication and hence there is no such requirement that...
Answer – Let the carrier wave frequency be represented by \[{{\omega }_{c}}\] and let \[{{\omega }_{s}}\]be the signal wave frequency. Then the received signal will be given by...
Answer – According to the question, we have – Maximum Amplitude; \[{{A}_{max~}}\] = 10 V Minimum Amplitude; \[{{A}_{min}}~\]= 2 V It is quite known that the modulation index of an amplitude...
Answer – 9V Explanation – We are given – Amplitude of carrier wave ; \[{{A}_{c}}\] = 12 V Modulation index (m) = 75% = 0.75 Amplitude of the modulating wave = ${{A}_{m}}$ We will now use the...
(i) Do not provide a continuous set of values (ii) Represent value as discrete steps (iii) Can utilize binary system (iv) Can utilize decimal as well as binary systems State which statement(s) are...
(1) Ground Waves (2) Sky Waves (3) Surface Waves (4) Space Waves ANSWER – Space Waves Explanation – An ultra-high frequency (UHF) wave cannot be reflected back by the ionosphere as the highly...
(1) 10 kHz (2) 10 MHz (3) 1 GHz (4) 1000 GHz Answer - 10 MHz In case of beyond – the – horizon communication, the signal needs to cover large distances. For a signal of frequency 10kHz, the signal...