USI CHAPTER 3 2026/2027 | STUDY GUIDE, PRACTICE QUESTIONS, ANSWERS &
COMPREHENSIVE EXAM REVIEW
Which of the following is a measurement of the strength of a signal relative to ambient noise? - ANS
✔✔snr
Which of the following is NOT a function of a remotely piloted aircraft system's data link? - ANS
✔✔Providing return to home commands in the event of an interruption
Which of the following are typical hardware components of a data link? (Select all that apply) - ANS
✔✔Antenna , Modem , Receiver , Transmitter
True or False. Frequency Modulation involves encoding information into a carrier wave by varying the
amplitude, amount of energy carried by the wave. - ANS ✔✔False
Terrian masking, equipment failures, and electromagnetic interference can cause which of the following
conditions? - ANS ✔✔loss of link
Obstacles within the transmission path of a radio wave cause which of the following? - ANS ✔✔Radio
Frequency Interference
Which of the following refers to the bending of waves as they pass from one medium to another due to a
change in their speed? - ANS ✔✔refraction
Using directional antennas, implementing encryption, and signal filtering are all techniques that can do
which of the following? - ANS ✔✔: Improve the reliability of the data link
The uplink, which describes the portion of the data link that transmits commands and flight plan changes
from the ground control station to the air vehicle, is also known as which of the following? - ANS
✔✔command link
If power and wavelength are equal, which antennas would have the shortest range? - ANS ✔✔omni-
directional
COMPREHENSIVE EXAM REVIEW
Which of the following is a measurement of the strength of a signal relative to ambient noise? - ANS
✔✔snr
Which of the following is NOT a function of a remotely piloted aircraft system's data link? - ANS
✔✔Providing return to home commands in the event of an interruption
Which of the following are typical hardware components of a data link? (Select all that apply) - ANS
✔✔Antenna , Modem , Receiver , Transmitter
True or False. Frequency Modulation involves encoding information into a carrier wave by varying the
amplitude, amount of energy carried by the wave. - ANS ✔✔False
Terrian masking, equipment failures, and electromagnetic interference can cause which of the following
conditions? - ANS ✔✔loss of link
Obstacles within the transmission path of a radio wave cause which of the following? - ANS ✔✔Radio
Frequency Interference
Which of the following refers to the bending of waves as they pass from one medium to another due to a
change in their speed? - ANS ✔✔refraction
Using directional antennas, implementing encryption, and signal filtering are all techniques that can do
which of the following? - ANS ✔✔: Improve the reliability of the data link
The uplink, which describes the portion of the data link that transmits commands and flight plan changes
from the ground control station to the air vehicle, is also known as which of the following? - ANS
✔✔command link
If power and wavelength are equal, which antennas would have the shortest range? - ANS ✔✔omni-
directional
