Q. When fs is the signal frequency and fi is the intermediate frequency, then image frequency fsi is given by

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Q. Which curve represents the fidelity curve of a standard receiver?

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Q. The selectivity curve of a standard receiver is represented by

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Q. Transport lag usually exists in

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Q. Which are the popular IF frequencies for microwave and radar receivers operating on frequencies in the range 1 to 10 GHz

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Q. In a ratio detector

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Q. Neutralization is used in RF amplifiers to

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Q. It is known that noise phase modulates the FM wave. As the noise side band frequency approaches the carrier frequency, the noise amplitude

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Q. A transmitter serial current contains

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Q. In a broadcast superheterodynes receiver having no RF amplifier, the loaded Q of the antenna coupling circuit is 100. If the intermediate frequency is 455 kHz. The image frequency at 25 MHz will be

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Q. In a communication system, noise is most likely to affect the signal

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Q. The noise produced by a resistor is proportional to

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Q. In a radio receiver, if the intermediate frequency is too high

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Q. In a receiver, which of the following device has IF input but RF output?

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Q. Transistor are free from which type of noise?

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Q. Standard AM radio broadcasts are confined to

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Q. In a radio receiver with simple AGC

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Q. Which of the following cannot be used to demodulate SSB?

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Q. In a broadcast superheterodyne receiver

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Q. A duplexer is a device used to

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