Radio Receivers The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency To permit easier tracking To allow adequate frequency coverage without switching Because otherwise an intermediate frequency could not be produced To help the image frequency rejection To permit easier tracking To allow adequate frequency coverage without switching Because otherwise an intermediate frequency could not be produced To help the image frequency rejection ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers When a receiver has good blocking performance, this means that It does not suffer from double-spotting Its image frequency rejection is poor Its detector suffers from burnout It is unaffected by AGC derived from nearby transmissions It does not suffer from double-spotting Its image frequency rejection is poor Its detector suffers from burnout It is unaffected by AGC derived from nearby transmissions ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Variable sensitivity Squelch Double conversion Variable selectivity Variable sensitivity Squelch Double conversion Variable selectivity ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A receiver has poor IF selectivity. It will therefore also have poor Double-spotting Blocking Sensitivity Diversion reception Double-spotting Blocking Sensitivity Diversion reception ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because It does not require crystal oscillator It is a simpler piece of equipment Its frequency stability is better It is relatively free of spurious frequency It does not require crystal oscillator It is a simpler piece of equipment Its frequency stability is better It is relatively free of spurious frequency ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a ratio detector 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 the circuit is the same as in a discriminator, except that the diodes are reversed ANSWER DOWNLOAD EXAMIANS APP
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