Question 1

What term describes amplifiers intended to produce intermediate levels of power amplification?
A)Transformer
B)Capacitor
C)Driver
D)Carrier

Accepted Answer

A driver is an amplifier that is designed to produce intermediate levels of power amplification. Transformers and capacitors are passive components, while a carrier is a signal that carries information.

Question 2

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

Accepted Answer

C

Question 3

What is transmitter troubleshooting in the frequency domain heavily reliant on?
A)Spectrum analyzers
B)High-level modulators
C)Neutralizing capacitors
D)Transistor modulators

Accepted Answer

Transmitter troubleshooting in the frequency domain heavily relies on spectrum analyzers because they provide detailed information about the frequency spectrum of the signal being transmitted. With a spectrum analyzer, you can identify frequency peaks, detect frequency drift, locate interfering signals, and determine the signal's frequency response.

Question 4

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

Accepted Answer

requency-division multiplexing

Question 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

Accepted Answer

Vacuum tubes are commonly used in high-power radio transmitters due to their ability to handle high voltage and current levels.

Question 6

_____________ 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

Accepted Answer

Multiplex operation is the process of combining multiple signals onto a single carrier. This allows for more efficient use of the transmission medium and increases the amount of data or information that can be communicated simultaneously.

Question 7

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

Accepted Answer

The choice of high- or low-level modulation is largely driven by the required power output of the system. High-level modulation can achieve higher power output but requires a more complex circuit and can introduce distortion. Low-level modulation can achieve lower power output but has simpler circuitry and less distortion. Therefore, the choice should be based on the power requirements of the system.

Question 8

The modulation process is accomplished in a(n)________________.
A)nonlinear device
B)linear devices
C)transmitter
D)amplifier

Accepted Answer

The modulation process is accomplished in a nonlinear device because it involves the multiplication of two signals, which results in the generation of new frequency components.

Question 9

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

Accepted Answer

A dummy antenna, also known as a load resistor, simulates an antenna load to prevent damage to the output circuits when no actual antenna is connected. This is especially important for high-power transmitters. The other options listed do not relate to preventing damage from unloaded conditions.

Question 10

From where does the intelligence amplifier receive its signal?
A)Input transducer
B)Oscillator
C)Modulator
D)Cathode

Accepted Answer

The intelligence amplifier receives its signal from an input transducer, which converts the input signal (e.g. sound waves, electrical signals) into an electrical signal that can be amplified by the amplifier. Oscillators generate a continuous signal, modulators vary the amplitude or frequency of a signal, and cathodes emit electrons in a vacuum tube. None of these components are responsible for providing the signal to be amplified.

Question 11

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

Accepted Answer

In a reactance modulator, the transistor is effectively made to function as a variable capacitance, which modifies the frequency of the output signal based on variations in the input signal. Therefore, the best choice is D - variable capacitance.

Question 12

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

Accepted Answer

The phase method 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. By adjusting the phase of one of the sidebands, the unwanted sideband can be cancelled out, leaving only the desired sideband. The other choices (A, B, D) are not directly related to the generation of SSB signals.

Question 13

FM transmitters are composed of oscillators,amplifiers,modulating stages,and ____________.
A)filters
B)sidebands
C)circuits
D)analyzers

Accepted Answer

FM transmitters require filters to ensure that only the desired frequency is transmitted and to eliminate any unwanted noise or interference. The other options (B, C, D) are either not relevant components or do not play an essential role in the function of an FM transmitter.

Question 14

To where does the transmitter deliver its power?
A)Modulator
B)Oscillator
C)Amplifier
D)Antenna

Accepted Answer

The power delivered by the transmitter is sent to the antenna, which broadcasts the signal into the air. Therefore, the correct choice is D- Antenna.

Question 15

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

Accepted Answer

A buffer amplifier is often used as an impedance matching circuit between different parts of a circuit. In this case, it is being used to provide a high-impedance load for the oscillator to minimize drift or undesired frequency shift resulting from circuit-loading effects. Therefore, a buffer amplifier is the best choice for this situation.

Question 16

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

Accepted Answer

Self-oscillation is a problem that can occur in all RF amplifiers, regardless of whether they are linear or class C, and regardless of whether they are tube-based or solid state. Self-oscillation can happen when there is feedback between the input and output of the amplifier and can result in unwanted noise and distortion.

Question 17

What is a balanced modulator an example of?
A)Linear multiplier
B)Low-level modulation
C)High-level modulation
D)Integrated circuits

Accepted Answer

A balanced modulator is an example of a linear multiplier, which is a type of analog signal processing circuit that creates an output signal that is proportional to the product of two input signals. This is the function of a balanced modulator, which combines a carrier wave and a modulating signal to create a modulated signal that carries the information from the modulating signal.

Therefore, the best choice is A.

Question 18

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

Accepted Answer

The FCC (Federal Communications Commission) requires high accuracy in the frequencies used by transmitters to ensure they operate within their assigned spectrum and do not interfere with other communications. Crystal-controlled oscillators are used to meet these stringent requirements.

Question 19

A(n) ____________ AM signal will usually cause a change in dc current flow.
A)interfering
B)controlled
C)distorted
D)unwanted

Accepted Answer

A distorted AM signal can cause a change in DC current flow due to the alteration of the signal's waveform, which affects the demodulation process and can lead to variations in the DC component of the output.

Question 20

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

Accepted Answer

The answer of The electronic circuitry used to increase the...

Quiz 5: Transmitters

What term describes amplifiers intended to produce intermediate levels of power amplification?

Which of the following is an FM system utilizing direct generation with AFC?

What is transmitter troubleshooting in the frequency domain heavily reliant on?

Which of the following is when signals are multiplexed together by having them coexist in two different frequency ranges?

In what application are vacuum tubes still found in electronic communications?

_____________ is the simultaneous transmission of two or more signals on one carrier.

What is the choice of high- or low-level modulation largely driven by?

The modulation process is accomplished in a(n) ________________.

Which of the following prevents damage to the output circuits that may occur under unloaded conditions?

From where does the intelligence amplifier receive its signal?

In a reactance modulator,a transistor is effectively made to function as a(n) ______________.

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.

FM transmitters are composed of oscillators,amplifiers,modulating stages,and ____________.

To where does the transmitter deliver its power?

The ___________ amplifier provides a high-impedance load for the oscillator to minimize drift or undesired frequency shift as a result of circuit-loading effects.

Which of the following is a problem for all RF amplifiers (linear and class C) both tube-based and solid state?

What is a balanced modulator an example of?

The oscillator that generates the carrier signal will be crystal-controlled to maintain the high accuracy required by the _______________.

A(n) ____________ AM signal will usually cause a change in dc current flow.

The electronic circuitry used to increase the operating frequency of a transmitter up to a specified value is called the_____________.