State the need of AGC.

State the need of AGC.
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Need of AGC:-  The need or purpose of AGC circuit is to maintain the output voltage level (volume) of radio receiver constant over a wide range of RF input signal level.  AGC also helps to smooth out the rapid fading which may occur with long distance short wave reception & prevents overloading of the last IF amplifier which might otherwise have occurred 
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Last Answer : Solution :

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Explain virtual height with respect to wave propagation with neat sketch.

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Explain isotropic radiator with neat sketch.

Description : Explain isotropic radiator with neat sketch. 

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A telephone cable has following primary constants per loop kilometer ,R=30Ω, L=20mH,C=0.06µF,G=0.If the applied signal has an angular frequency of 5000 rad/sec.., Determine (i) Characteristics impedence (ii) Attenuation constant

Description : A telephone cable has following primary constants per loop kilometer ,R=30Ω, L=20mH,C=0.06µF,G=0.If the applied signal has an angular frequency of 5000 rad/sec.., Determine (i) Characteristics impedence (ii) Attenuation constant

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Explain ground wave propogation with neat sketch.

Description : Explain ground wave propogation with neat sketch. 

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