Subelement T7 Group A

FCC Technician Class Exam Study Guide - 2014-2018 · Wikibooks

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    From Wikibooks, under CC BY-SA 4.0, as the source states it. This page at Wikibooks.

    Station equipment: receivers; transmitters; transceivers; modulation; transverters; low power and weak signal operation; transmit and receive amplifiers

    The Question Pool

    Question 1

    Which term describes the ability of a receiver to detect the presence of a signal?
    A. Linearity
    B. Sensitivity
    C. Selectivity
    D. Total Harmonic Distortion


    The correct answer is B.

    Question 2

    What is a transceiver?
    A. A type of antenna switch
    B. A unit combining the functions of a transmitter and a receiver
    C. A component in a repeater which filters out unwanted interference
    D. A type of antenna matching network


    The correct answer is B.

    Question 3

    Which of the following is used to convert a radio signal from one frequency to another?
    A. Phase splitter
    B. Mixer
    C. Inverter
    D. Amplifier


    The correct answer is B.

    Question 4

    Which term describes the ability of a receiver to discriminate between multiple signals?
    A. Discrimination ratio
    B. Sensitivity
    C. Selectivity
    D. Harmonic Distortion


    The correct answer is C.

    Question 5

    What is the name of a circuit that generates a signal of a desired frequency?
    A. Reactance modulator
    B. Product detector
    C. Low-pass filter
    D. Oscillator


    The correct answer is D.

    Question 6

    What device takes the output of a low-powered 28 MHz SSB exciter and produces a 222 MHz output signal?
    A. High-pass filter
    B. Low-pass filter
    C. Transverter
    D. Phase converter


    The correct answer is C.

    Question 7

    What is meant by term “PTT”?
    A. Pre-transmission tuning to reduce transmitter harmonic emission
    B. Precise tone transmissions used to limit repeater access to only certain signals
    C. A primary transformer tuner use to match antennas
    D. The push to talk function which switches between receive and transmit


    The correct answer is D.

    Question 8

    Which of the following describes combining speech with an RF carrier signal?-
    A. Impedance matching
    B. Oscillation
    C. Modulation
    D. Low-pass filtering


    The correct answer is C.

    Question 9

    Which of the following devices is most useful for VHF weak-signal communication?
    A. A quarter-wave vertical antenna
    B. A multi-mode VHF transceiver
    C. An omni-directional antenna
    D. A mobile VHF FM transceiver


    The correct answer is B.

    Question 10

    What device increases the low-power output from a handheld transceiver?
    A. A voltage divider
    B. An RF power amplifier
    C. An impedance network
    D. All of these choices are correct


    The correct answer is B.

    Question 11

    Where is a RF preamplifier installed?
    A. Between the antenna and receiver
    B. At the output of the transmitter's power amplifier
    C. Between a transmitter and antenna tuner
    D. At the receiver's audio output


    The correct answer is A.