When a receiver has good blocking performance, this means that
When a receiver has good blocking performance, this means that
An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive
An AM receiver uses a diode detector for demodulation. This enables it satisfactorily to receive
A low ratio of the ac to the dc load impedance of a diode detector results in
A low ratio of the ac to the dc load impedance of a diode detector results in
Indicate which of the following circuits could not demodulate SSB:
Indicate which of the following circuits could not demodulate SSB:
Indicate the false statement in connection with communications receivers.
Indicate the false statement in connection with communications receivers.
If the intermediate frequency is very high (indicate false statement)
If the intermediate frequency is very high (indicate false statement)
One of the main functions of the RF amplifier in a superheterodyne receiver is to
One of the main functions of the RF amplifier in a superheterodyne receiver is to
In a radio receiver with simple AGC
In a radio receiver with simple AGC
Show which of the following statements about the amplitude limiter is untrue:
Show which of the following statements about the amplitude limiter is untrue:
In a broadcast superheterodyne receiver, the
In a broadcast superheterodyne receiver, the
Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false:
Indicate which of the following statements about the advantages of the phase discriminator over the slope detector is false:
A receiver has poor IF selectivity. It will therefore also have poor
A receiver has poor IF selectivity. It will therefore also have poor
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of
If a FET is used as the first AF amplifier in a transistor receiver, this will have the effect of
To prevent overloading of the IF amplifier in a receiver, one should use
To prevent overloading of the IF amplifier in a receiver, one should use
One of the following cannot be used to demodulate SSB:
One of the following cannot be used to demodulate SSB:
Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that
Indicate the false statement. Noting that no carrier is transmitter with J3E, we see that
The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency
The local oscillator of a broadcast receiver is tuned to a frequency higher than the incoming frequency
The typical squelch circuit cuts off
The typical squelch circuit cuts off
A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
A superheterodyne receiver with an IF of 450 kHz is tuned to a signal at 1200 kHz. The image frequency is
The image frequency of a superheterodyne receiver
The image frequency of a superheterodyne receiver
Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from
Indicate the false statement. The superheterodyne receiver replaced the TRF receiver because the latter suffered from
The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to
The frequency generated by each decade in a direct frequency synthesizer is much higher than the frequency shown; this is done to
Three-point tracking is achieved with
Three-point tracking is achieved with
The controlled oscillator synthesizer is sometimes preferred over the direct one because
The controlled oscillator synthesizer is sometimes preferred over the direct one because
In a ratio detector
In a ratio detector
