Radio Receivers The controlled oscillator synthesizer is sometimes preferred over the direct one because It does not require crystal oscillator Its frequency stability is better It is relatively free of spurious frequency It is a simpler piece of equipment It does not require crystal oscillator Its frequency stability is better It is relatively free of spurious frequency It is a simpler piece of equipment ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is 1650 kHz 900 kHz 2100 kHz 750 kHz 1650 kHz 900 kHz 2100 kHz 750 kHz ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency To help the image frequency rejection Because otherwise an intermediate frequency could not be produced To permit easier tracking To allow adequate frequency coverage without switching To help the image frequency rejection Because otherwise an intermediate frequency could not be produced To permit easier tracking To allow adequate frequency coverage without switching 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 A receiver has poor IF selectivity. It will therefore also have poor Blocking Diversion reception Double-spotting Sensitivity Blocking Diversion reception Double-spotting Sensitivity ANSWER DOWNLOAD EXAMIANS APP
EXAMIANS