Nav Comm Section 1 part2

Question 1

What two types of modulation do we use in aviation?

Answer 1

AM- amplitude modulation

Fm- frequency modulation

Question 2

What type of modulation is most often affected by adverse atmospheric conditions such as thunderstorms?

Answer 2

AM amplitude modulation, the least susceptible is FM

Question 3

What are ground waves?

Answer 3

Tends to travel along the ground and curve with the earth

Question 4

What frequency bands are considered to be ground waves?

Answer 4

MF LF VLF

Question 5

What are sky waves?

Answer 5

Bounces off the ionosphere for more distance

Question 6

What frequency bands are considered to be sky waves?

Answer 6

HF

Question 7

What are space waves?

Answer 7

Line of sight transmission

Question 8

What frequency bands are considered to be space waves?

Answer 8

VHF and higher = VOR and VHF comm

Question 9

What are radios that can transmit & receive called?

Answer 9

Transceivers

Question 10

What radios would use a Hertz Dipole antenna?

Answer 10

VOR, localizer

Question 11

What radios would use a Marconi Monopole antenna?

Answer 11

Comm, DME, transponder

Question 12

What radios would use a wire type antenna?

Answer 12

AM radios or HF (High Frequency)

Question 13

What radios would use a loop type antenna?

Answer 13

ADF

Question 14

What are Communication Radios (Comm Radios) primarily used for?

Answer 14

Communication with ATC - air to ground

Question 15

What are the two most common types of Comm radios?

Answer 15

VHF comm and HF comm, ATC uses VHF