Quiz 5: Transmitters

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

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

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

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

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

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

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

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

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

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

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

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

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

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

_____________ 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

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

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

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

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

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

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

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

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

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

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