Deck 5: Transmitters

Question 1

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

Answer 1

Driver .

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

Answer 2

Crosby

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

Answer 3

Spectrum analyzers

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

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

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

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

Question 8

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

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

Question 10

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

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

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

Question 13

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

Question 14

To where does the transmitter deliver its power?
A.Modulator
B.Oscillator
C.Amplifier
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

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

Question 17

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

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

Question 19

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

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

Question 21

An unwanted sideband can be suppressed by either the filter method or the ________ method.
A.phasing
B.conversion
C.balanced
D.modulating

Question 22

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

Question 23

What term is used to denote the circuitry that generates the modulated signal?
A.Detector
B.Exciter
C.Pump chain
D.Discriminator

Question 24

What usually causes downward modulation?
A.Improper phase relationship
B.Interfering frequency components
C.Stray coupling
D.Insufficient excitation

Question 25

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