A low ratio of the ac to the dc load impedance of a diode detector results in
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ECE · all questionsRadio Receivers
Radio Receivers
practice.
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Indicate which of the following circuits could not demodulate SSB:
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If the intermediate frequency is very high (indicate false statement)
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One of the following cannot be used to demodulate SSB:
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Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false:
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The controlled oscillator synthesizer is sometimes preferred over the direct one because
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A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
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The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency
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Show which of the following statements about the amplitude limiter is untrue:
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A receiver has poor IF selectivity. It will therefore also have poor
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An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive
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In a ratio detector
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Three-point tracking is achieved with
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Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that
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In a radio receiver with simple AGC
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To prevent overloading of the IF amplifier in a receiver, one should use
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If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of
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Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from
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The typical squelch circuit cuts off
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When a receiver has good blocking performance, this means that
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