TECHNICAL FUNDAMENTALS Flashcards
1
Q
EHF
A
Extremely High Frequency;
30-300GHZ
2
Q
SHF
A
Super High Frequency;
3-30GHZ
(Used for SATCOM)
3
Q
UHF
A
Ultra High Frequency;
300MHZ-3GHZ
4
Q
VHF
A
Very High Frequency;
30-300MHZ
5
Q
HF
A
High Frequency;
3-30MHZ
6
Q
What does RADAR stand for?
A
Radio Detection and Ranging
7
Q
What are 3 types of keying?
A
ASK, FSK, PSK
- Amplitude Shift Keying
- Frequency Shift Keying
- Phase Shift Keying
8
Q
What is Ducting?
A
Waves trapped in between atmospheric layers
9
Q
What are the layers of the atmosphere?
A
IONOSPHERE; Point to point comms
STRATUSPHERE; Least effect on radio waves
TROPOSPHERE; Weather takes place here
10
Q
What are the 3 types of Propogation?
A
- Reflection
- Refraction
- Diffraction
11
Q
What is AM?
A
Amplitude Modulation
12
Q
What is FM?
A
Frequency Modulation
13
Q
What is PRI?
A
Pulse Repetition Interval, Start of pulse to start of next
14
Q
What is PRF?
A
Pulse Repetition Frequency, Measured in Hertz
15
Q
What is PW?
A
Pulse Width
