- The three main parameters against which the quality of a receiver is
measured are:
A. selectivity, stability and frequency range
B. sensitivity, stability and cross-modulation
C. sensitivity, selectivity and image rejection
D. sensitivity, selectivity and stability
- The figure in a receiver’s specification which indicates its
sensitivity is the:
A. signal plus noise to noise ratio
B. audio output in watts
C. bandwidth of the IF in kilohertz
D. number of RF amplifiers
- If two receivers of different sensitivity are compared, the less
sensitive receiver will produce:
A. a steady oscillator drift
B. more than one signal
C. less signal or more noise
D. more signal or less noise
- Which of the following modes of transmission is usually detected
with a product detector?
A. Double sideband full carrier.
B. Frequency modulation.
C. Pulse modulation.
D. Single sideband suppressed carrier.
- A receiver designed for SSB reception must have a BFO (beat
frequency oscillator) because:
A. it beats with the received carrier to produce the other sideband
B. it reduces the passband of the IF stages
C. the suppressed carrier must be replaced for detection
D. it phases out the unwanted sideband signal
- What kind of filter would you use to attenuate an interfering
carrier signal while receiving an SSB transmission?
A. A notch filter.
B. A band pass filter.
C. An all pass filter.
D. A pi-network filter.
- Which list of emission types is in order from the narrowest to the
widest bandwidth?
A. CW, SSB voice, RTTY, FM voice.
B. CW, FM voice, RTTY, SSB voice.
C. CW, RTTY, SSB voice, FM voice.
D. RTTY, CW, SSB voice, FM voice.
- A receiver receives an incoming signal of 3.54 MHz, and the local
oscillator produces a signal of 3.995 MHz. To which frequency should the
IF be tuned?
A. 7.435 MHz.
B. 3.995 MHz.
C. 455 kHz.
D. 3.54 MHz.
- A communications receiver has four filters installed in it, one at
250 Hz, one at 500 Hz, one at 2.4 kHz, and one at 6 kHz. If you were
listening to single sideband, which filter would you utilize?
A. 250 Hz.
B. 2.4 kHz.
C. 6 kHz.
D. 500 Hz.
- A communications receiver has four filters installed in it, one at
250 Hz, one at 500 Hz, one at 2.4 kHz, and one at 6 kHz. You are copying
a CW transmission and there is a great deal of interference. Which one
of the filters would you choose?
A. 500 Hz.
B. 2.4 kHz.
C. 6 kHz.
D. 250 Hz.
- Selectivity can be placed in the audio stages of a receiver by
utilization of RC active or passive audio filters. If you were to copy
CW, which of the following bandpasses would you choose?
A. 2100-2300 Hz.
B. 300-2700 Hz.
C. 750 to 850 Hz.
D. 100 to 1100 Hz.
- In a single sideband and CW receiver, the antenna is connected to
the__________.
A. product detector
B. high frequency oscillator
C. intermediate frequency amplifier
D. radio frequency amplifier
- In a single sideband and CW receiver, the output of the ___________
is connected to the mixer.
A. filter
B. intermediate frequency amplifier
C. audio frequency
D. radio frequency amplifier
- In a single sideband and CW receiver, the _________ is connected to
the radio frequency amplifier and the high frequency oscillator.
A. beat frequency oscillator
B. product detector
C. mixer
D. filter
- In a single sideband and CW receiver, the output of the __________
is connected to the mixer.
A. intermediate frequency amplifier
B. high frequency oscillator
C. beat frequency oscillator
D. a product detector
- In a single sideband and CW receiver, the __________ is in between
the mixer and intermediate frequency amplifier.
A. filter
B. radio frequency amplifier
C. beat frequency oscillator
D. product detector
- In a single sideband and CW receiver, the ___________ is in between
the filter and the product detector.
A. intermediate frequency amplifier
B. audio frequency amplifier
C. beat frequency oscillator
D. radio frequency amplifier
- In a single sideband and CW receiver, the ___________ output is
connected to the audio frequency amplifier.
A. product detector
B. high frequency oscillator
C. beat frequency oscillator
D. intermediate frequency amplifier
- In a single sideband and CW receiver, the output of the __________
is connected to the product detector.
A. mixer
B. beat frequency oscillator
C. radio frequency amplifier
D. audio frequency amplifier
- In a single sideband and CW receiver, the ___________ is connected
to the output of the product detector.
A. intermediate frequency amplifier
B. audio frequency amplifier
C. high frequency oscillator
D. radio frequency amplifier
- In a single sideband and CW receiver, the ___________ is connected
to the output of the audio frequency amplifier.
A. speaker and/or headphones
B. mixer
C. radio frequency amplifier
D. beat frequency oscillator
- In a frequency modulation receiver, the ___________ is connected to
the input of the radio frequency amplifier.
A. mixer
B. frequency discriminator
C. antenna
D. limiter
- In a frequency modulation receiver, the __________ is in between the
antenna and the mixer.
A. audio frequency amplifier
B. high frequency oscillator
C. intermediate frequency amplifier
D. radio frequency amplifier
- In a frequency modulation receiver, the output of the high frequency
oscillator is fed to the:
A. radio frequency amplifier
B. limiter
C. antenna
D. mixer
- In a frequency modulation receiver, the output of the __________ is
connected to the mixer.
A. frequency discriminator
B. intermediate frequency amplifier
C. speaker and/or headphones
D. high frequency oscillator
- In a frequency modulation receiver, the _________ is in between the
mixer and the intermediate frequency amplifier.
A. filter
B. limiter
C. frequency discriminator
D. radio frequency amplifier
- In a frequency modulation receiver, the __________ is located
between the filter and limiter.
A. high frequency oscillator
B. intermediate frequency amplifier
C. mixer
D. radio frequency amplifier
- In a frequency modulation receiver, the _________ is in between the
intermediate frequency amplifier and the frequency discriminator.
A. filter
B. high frequency oscillator
C. limiter
D. radio frequency amplifier
- In a frequency modulation receiver, the __________ is located
between the limiter and the audio frequency amplifier.
A. intermediate frequency amplifier
B. speaker and/or headphones
C. high frequency oscillator
D. frequency discriminator
- In a frequency modulation receiver, the ____________ is located
between the speaker and/or headphones and the frequency discriminator.
A. limiter
B. intermediate frequency amplifier
C. radio frequency amplifier
D. audio frequency amplifier
- In a frequency modulation receiver, the __________ connects to the
audio frequency amplifier.
A. intermediate frequency amplifier
B. frequency discriminator
C. speaker and/or headphones
D. limiter
- To increase the level of very weak radio signals from an antenna,
you would use:
A. an RF oscillator
B. an audio oscillator
C. an RF amplifier
D. an audio amplifier