Easy Communications Questions – Electrical Engineering (Page 10)

#181📘 reviewer_appEasy

Also known as phase comparator

Aphase detector

Bphase-locked loop

Cvoltage controlled oscillator

Dfrequency synthesizer

#182📘 reviewer_appEasy

It means to form an entity by combining parts or elements

Aoscillate

Bintegrate

Camplify

Dsynthesize

#183📘 reviewer_appEasy

The method of determining the bandwidth requirements for any processing systems is referred to as:

Afrequency spectrum

Bfrequency analysis

Cspectral analysis

Dbandwidth analysis

#184📘 reviewer_appEasy

The kind of noise that is caused by mismatched lines

Aecho noise

Bimpulse noise

Cpartition noise

Dintermodulation noise

#185📘 reviewer_appEasy

What is the reference tone level for RANDOM noise measurement F1A weighted?

A-90 dBm

B-82 dBm

C-67 dBm

D-85 dBm

#186📘 reviewer_appEasy

A widely used balanced modulator is called the

ADiode bridge circuit

BFull-wave bridge rectifier

CLattice modulator

DBalanced bridge modulator

#187📘 reviewer_appEasy

The principal circuit in the popular 1496/1596 IC balanced modulator is a

ADifferential amplifier

BRectifier

CBridge

DConstant current source

#188📘 reviewer_appEasy

In the phasing method used to demodulate a SSB signal is called a(n)

ATransponder

BProduct detector

CConverter

DModulator

#189📘 reviewer_appEasy

Which of the ff can be used as a mixer?

ABalanced modulator

BFET

CDiode detector

DAll of them

#190📘 reviewer_appEasy

The desired output from a mixer is usually selected with a

APhase-shift circuit

BCrystal filter

CResonant circuit

DTransformer

#191📘 reviewer_appEasy

What is the relative amplitude of the third pair of sidebands of an FM signal with m=6?

A0.11

B0.17

C0.24

D0.36

#192📘 reviewer_appEasy

Which of the ff circuits is NOT typically part of every radio transmitter?

ACarrier oscillator

BDriver amplifier

CMixer

DFinal power amplifier

#193📘 reviewer_appEasy

Class C amplifiers are NOT used in which type of transmitter?

AAM

BSSB

CCW

DFM

#194📘 reviewer_appEasy

Bias for a class C amplifier produced by an input RC network is known as

ASignal bias

BSelf bias

CFixed external bias

DTreshold bias

#195📘 reviewer_appEasy

Collector current in a class C amplifier is a

ASine wave

BHalf sine wave

CPulse

DSquare wave

#196📘 reviewer_appEasy

The maximum power of a typical transistor RF power amplifier is in what range?

AMilliwatts

BWatts

CHundred of watts

DKilowatts

#197📘 reviewer_appEasy

Self-oscillation in a transistor amplifier is usually caused by

Aexcessive gain

Bstray inductance

Cinternal capacitance

Dunmatch impedances

#198📘 reviewer_appEasy

Neutralization is the process of

Acancelling the effect of internal device capacitance

Bbypassing undesired alternating current

Creducing gain

Deliminating harmonics

#199📘 reviewer_appEasy

Which of the ff is NOT a benefit of a toroid RF inductor?

ANo shielding required

BFewer truns of wire

CHigher Q

DSelf-supporting

#200📘 reviewer_appEasy

A toroid is a

AType of inductor

BTransformer

CMagnetic core

DCoil holder

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