Radio Receivers When a receiver has good blocking performance, this means that It is unaffected by AGC derived from nearby transmissions Its detector suffers from burnout It does not suffer from double-spotting Its image frequency rejection is poor It is unaffected by AGC derived from nearby transmissions Its detector suffers from burnout It does not suffer from double-spotting Its image frequency rejection is poor ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a broadcast superheterodyne receiver, the Local oscillator frequency is normally double the IF Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator frequency is normally double the IF Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency RF amplifier normally works at 455 kHz above the carrier frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a ratio detector the circuit is the same as in a discriminator, except that the diodes are reversed the linearity is worse than in phase discriminator stabilization against signal strength variations is provided the output is twice that obtainable from a similar phase discriminator the circuit is the same as in a discriminator, except that the diodes are reversed the linearity is worse than in phase discriminator stabilization against signal strength variations is provided the output is twice that obtainable from a similar phase discriminator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Show which of the following statements about the amplitude limiter is untrue: The output must be tuned The circuit is always biased in class C, by virtue of the leak-type bias. Leak-type bias must be used When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. The output must be tuned The circuit is always biased in class C, by virtue of the leak-type bias. Leak-type bias must be used When the input increases past the threshold of the limiting, the gain decreases to keep the output constant. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The typical squelch circuit cuts off An IF amplifier when the AGC is maximum RF interference when the signal is weak an audio amplifier when the carrier is absent An IF amplifier when the AGC is minimum An IF amplifier when the AGC is maximum RF interference when the signal is weak an audio amplifier when the carrier is absent An IF amplifier when the AGC is minimum ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If the intermediate frequency is very high (indicate false statement) The selectivity will be poor The local oscillator need not be extremely stable Tracking will be improved Image frequency rejection is very good The selectivity will be poor The local oscillator need not be extremely stable Tracking will be improved Image frequency rejection is very good ANSWER DOWNLOAD EXAMIANS APP
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