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प्रश्न
Block diagram of a receiver is shown in the figure:
(a) Identify ‘X’ and ‘Y’.
(b) Write their functions.
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उत्तर
From the given block diagram of Demodulation of a typical receiver, we can conclude the following,
(a) X represents Intermediate Frequency (IF) stage while Y represents an Amplifier.
(b) At IF stage, the carrier frequency is changed to a lower frequency and in this process, the modulated signal is detected. While the function of amplifier is to amplify the detected signal which may not be strong enough to be made use of and hence is required.
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संबंधित प्रश्न
Which of the following frequencies will be suitable for beyond-the-horizon communication using sky waves?
(a) 10 kHz
(b) 10 MHz
(c) 1 GHz
(d) 1000 GHz
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(a) Ground waves.
(b) Sky waves.
(c) Surface waves.
(d) Space waves.
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Answer the following question :
Define 'bandwidth' and describe briefly its importance in communicating signals ?
Differentiate between Analog and Digital communication.
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Long distance short-wave radio broadcasting uses
Broadcasting antennas are generally
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