Radio Receivers To prevent overloading of the IF amplifier in a receiver, one should use Squelch Variable selectivity Double conversion Variable sensitivity Squelch Variable selectivity Double conversion Variable sensitivity ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers If the intermediate frequency is very high (indicate false statement) The selectivity will be poor Tracking will be improved The local oscillator need not be extremely stable Image frequency rejection is very good The selectivity will be poor Tracking will be improved The local oscillator need not be extremely stable Image frequency rejection is very good ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that The transmission is not compatible with A3E Adjacent-channel rejection is more difficult Production of AGC is a rather complicated process The receiver cannot use a phase comparator for AFC The transmission is not compatible with A3E Adjacent-channel rejection is more difficult Production of AGC is a rather complicated process The receiver cannot use a phase comparator for AFC ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. A product demodulator could be used for the reception of Morse code. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection The noise limiter cuts off the receiver’s output during a noise pulse. A product demodulator could be used for the reception of Morse code. ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers One of the following cannot be used to demodulate SSB: Bipolar transistor balanced modulator Complete phase-shift generator Product detector Diode Balance modulator Bipolar transistor balanced modulator Complete phase-shift generator Product detector Diode Balance modulator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a ratio detector the output is twice that obtainable from a similar phase discriminator stabilization against signal strength variations is provided the circuit is the same as in a discriminator, except that the diodes are reversed the linearity is worse than in phase discriminator the output is twice that obtainable from a similar phase discriminator stabilization against signal strength variations is provided the circuit is the same as in a discriminator, except that the diodes are reversed the linearity is worse than in phase discriminator ANSWER DOWNLOAD EXAMIANS APP
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