Quiz 5: Transmitters
Chemistry
Q 1Q 1
To where does the transmitter deliver its power?
A.Modulator
B.Oscillator
C.Amplifier
D.Antenna
Free
Short Answer
Antenna
Q 2Q 2
The oscillator that generates the carrier signal will be crystal-controlled to maintain the high accuracy required by the _______________.
A.broadcast radio station
B.FM transmitter
C.FCC
D.Crosby-type modulator
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Short Answer
FCC
Q 3Q 3
From where does the intelligence amplifier receive its signal?
A.Input transducer
B.Oscillator
C.Modulator
D.Cathode
Free
Short Answer
Input transducer
Q 4Q 4
What term describes amplifiers intended to produce intermediate levels of power amplification?
A.Transformer
B.Capacitor
C.Driver
D.Carrier
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Short Answer
Q 5Q 5
In what application are vacuum tubes still found in electronic communications?
A.Frequency-modulated oscillator
B.High-power radio transmitters
C.Stereo multiplex FM broadcasts
D.Frequency-division multiplexing
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Short Answer
Q 6Q 6
What is transmitter troubleshooting in the frequency domain heavily reliant on?
A.Spectrum analyzers
B.High-level modulators
C.Neutralizing capacitors
D.Transistor modulators
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Short Answer
Q 7Q 7
A(n) ____________ AM signal will usually cause a change in dc current flow.
A.interfering
B.controlled
C.distorted
D.unwanted
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Short Answer
Q 8Q 8
Which of the following prevents damage to the output circuits that may occur under unloaded conditions?
A.Spectrum analyzer
B.Dummy antenna
C.Balanced modulator
D.Single-sideband transmitter
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Short Answer
Q 9Q 9
The ___________ of SSB generation relies on the fact that the upper and lower sidebands of an AM signal differ in the sign of their phase angles.
A.frequency deviation
B.phase shift
C.phase method
D.modulator stage
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Short Answer
Q 10Q 10
FM transmitters are composed of oscillators,amplifiers,modulating stages,and ____________.
A.filters
B.sidebands
C.circuits
D.analyzers
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Q 11Q 11
What is a balanced modulator an example of?
A.Linear multiplier
B.Low-level modulation
C.High-level modulation
D.Integrated circuits
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Q 12Q 12
In a reactance modulator,a transistor is effectively made to function as a(n)______________.
A.master oscillator
B.FM transmitter
C.varactor diode
D.variable capacitance
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Short Answer
Q 13Q 13
Which of the following is an FM system utilizing direct generation with AFC?
A.Phase-locked-loop (PLL)
B.Armstrong
C.Crosby
D.Multiplex operation
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Short Answer
Q 14Q 14
The electronic circuitry used to increase the operating frequency of a transmitter up to a specified value is called the_____________.
A.frequency multiplier
B.pump chain
C.phase shifter
D.balanced modulator
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Q 15Q 15
_____________ is the simultaneous transmission of two or more signals on one carrier.
A.Phase-detector output
B.Operating frequency
C.Electronic circuitry
D.Multiplex operation
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Short Answer
Q 16Q 16
Which of the following is when signals are multiplexed together by having them coexist in two different frequency ranges?
A.Frequency multipliers
B.Frequency-division multiplexing
C.Frequency-modulation
D.Preemphasis
Free
True False
Q 17Q 17
The ___________ amplifier provides a high-impedance load for the oscillator to minimize drift or undesired frequency shift as a result of circuit-loading effects.
A.final
B.intelligence
C.buffer
D.modulated
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Short Answer
Q 18Q 18
Which of the following is a problem for all RF amplifiers (linear and class C)both tube-based and solid state?
A.Self-oscillation
B.High-level modulation
C.Varying amplitudes
D.Low-level modulation
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Short Answer
Q 19Q 19
What is the choice of high- or low-level modulation largely driven by?
A.Desired amplification
B.Distortion
C.Self-oscillation
D.Required power output
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Short Answer
Q 20Q 20
The modulation process is accomplished in a(n)________________.
A.nonlinear device
B.linear devices
C.transmitter
D.amplifier
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Short Answer
Q 21Q 21
What will a standard oscilloscope display of the transmitted AM signal indicate?
A.Modulating voltage
B.Gross deficiencies
C.Intelligence frequency rate
D.Available energy
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Q 22Q 22
What usually causes downward modulation?
A.Improper phase relationship
B.Interfering frequency components
C.Stray coupling
D.Insufficient excitation
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Q 23Q 23
An unwanted sideband can be suppressed by either the filter method or the ________ method.
A.phasing
B.conversion
C.balanced
D.modulating
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Short Answer
Q 24Q 24
A direct FM system is one in which the frequency of the carrier oscillator is directly varied by the ___________.
A.unwanted sideband suppression
B.phase-shifted data
C.modulating signal
D.capacitance
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Short Answer
Q 25Q 25
What term is used to denote the circuitry that generates the modulated signal?
A.Detector
B.Exciter
C.Pump chain
D.Discriminator
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Short Answer