Radio Receivers Indicate which of the following circuits could not demodulate SSB: Phase discriminator BFO Balance modulator Product modulator Phase discriminator BFO Balance modulator Product modulator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a ratio detector stabilization against signal strength variations is provided the circuit is the same as in a discriminator, except that the diodes are reversed the output is twice that obtainable from a similar phase discriminator the linearity is worse than in 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 output is twice that obtainable from a similar phase discriminator the linearity is worse than in phase discriminator ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Three-point tracking is achieved with Double spotting Variable selectivity Double conversion The padder capacitor Double spotting Variable selectivity Double conversion The padder capacitor ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers Indicate the false statement in connection with communications receivers. A product demodulator could be used for the reception of Morse code. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection A product demodulator could be used for the reception of Morse code. The noise limiter cuts off the receiver’s output during a noise pulse. Variable sensitivity is used to eliminate selective fading Double conversion is used to improve image rejection 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 Image frequency rejection is very good The local oscillator need not be extremely stable The selectivity will be poor Tracking will be improved Image frequency rejection is very good The local oscillator need not be extremely stable ANSWER DOWNLOAD EXAMIANS APP
Radio Receivers In a broadcast superheterodyne receiver, the RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency Local oscillator frequency is normally double the IF RF amplifier normally works at 455 kHz above the carrier frequency Local oscillator operates below the signal frequency Mixer input must be tuned to the signal frequency Local oscillator frequency is normally double the IF ANSWER DOWNLOAD EXAMIANS APP
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