Communications

Question 1

Communications is…

Answer 1

the process of converting data into a signal, passing that signal to the distant point and at the destination

Question 2

radio waves…

Answer 2

As frequency increases, wavelength decreases.

As frequency decreases, wavelength increases

Question 3

name the types of ground waves

Answer 3

Surface waves
Ground reflected
Direct wave

Question 4

sky waves are

Answer 4

Reflected back to the earth from the ionosphere

Question 5

HF Waves

Answer 5

skywave: 2-29.9 MHz

Question 6

VHF waves

Answer 6

ground waves only: 3-89.9 MHz

Question 7

UHF waves

Answer 7

direct wave only, used for SATCOM: 225-512 MHz

Question 8

troubleshooting thoughts…

Answer 8

What is the distance?
Elevation?
What gear do I have available? (SL-3)
How long is my mission?
Antennae position

Question 9

PRC-150 (HF)

Answer 9

1.6-60 MHz.
Ground wave range: 15km
Sky wave range: 15+
Typically employed at the team and company level to extend voice/data communication beyond line of site.
Typically construct field expedient antennas for long distance transmissions

Question 10

PRC-152

Answer 10

VHF, UHF
30-512 MHz
Range: 5-8 km

Question 11

antennas sizes:

Answer 11

long antenna: VHF
Short antenna: UHF