When a receiver has good blocking performance, this means that
When a receiver has good blocking performance, this means that
Indicate which of the following circuits could not demodulate SSB:
Indicate which of the following circuits could not demodulate SSB:
The typical squelch circuit cuts off
The typical squelch circuit cuts off
The image frequency of a superheterodyne receiver
The image frequency of a superheterodyne receiver
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
A receiver has poor IF selectivity. It will therefore also have poor
A receiver has poor IF selectivity. It will therefore also have poor
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 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
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:
In a radio receiver with simple AGC
In a radio receiver with simple AGC
In a broadcast superheterodyne receiver, the
In a broadcast superheterodyne receiver, the
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
In a ratio detector
In a ratio detector
Show which of the following statements about the amplitude limiter is untrue:
Show which of the following statements about the amplitude limiter is untrue:
One of the following cannot be used to demodulate SSB:
One of the following cannot be used to demodulate SSB:
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
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
If the intermediate frequency is very high (indicate false statement)
If the intermediate frequency is very high (indicate false statement)
Indicate the false statement in connection with communications receivers.
Indicate the false statement in connection with communications receivers.
The controlled oscillator synthesizer is sometimes preferred over the direct one because
The controlled oscillator synthesizer is sometimes preferred over the direct one because
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
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
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
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
