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Communications

Class XIIth By SSI Sir No of Videos: 4 Favourite Watch Later
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Lect # 1
Content Covered:

communication system , modes of communications ,Transducer and Transmitter , signal , Noise , Receiver , Attenuation , Amplification , Range , Band width , Modulation , Demodulation

Duration: 27 Minutes
Lect # 2
Content Covered:

Band widths of signal , analog signal and digital signal , Band widths of transmission medium , Line communication , Radio communication , Optical communication , Types of wave propagation , Ground wave propagation , sky wave propagation , space wave propagation. Height of Tower and maximum distance covered by transmission

Duration: 39 Minutes
Lect # 3
Content Covered:

modulation and its necessity ,minimum length of antenna , types of modulation.Amplitude modulation ,side band frequencies , modulation index , disadvantages of amplitude modulation

Duration: 26 Minutes
Lect # 4
Content Covered:

Frequency modulation ,frequency deviation , carrier swing , modulation index , frequency spectrum , deviation ratio.percent modulation, Pulse modulation ,pulse amplitude modulation (PAM) , pulse width modulation (PWM) , pulse position modulation (PPM),Demodulation , important problems

Duration: 31 Minutes

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