FCC Technician Class Exam Study Guide - 2014-2018/Subelement T7 Group A

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

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.