Electromagnetic Attack and RF Frequency Interference

Question 1

What is Electromagnetic Interference?

Answer 1

A disturbance that affects an electrical circuit due to electromagnetic induction or electromagnetic radiation emitted from an external source

Question 2

What is Electromagnetic Attack?

Answer 2

EA involves the use of the EM spectrum to attack enemy target systems

Question 3

What is Constructive Interference?

Answer 3

Can be used in EA to enhance the strength of a signal, as well as increase the strength of friendly signals

Question 4

What is Destructive Interference?

Answer 4

Can be used in EA to reduce the fidelity of enemy signals

Question 5

What is Offensive EA?

Answer 5

Use of EA to support offensive military operations

Question 6

What is Defensive EA?

Answer 6

Use of EA to protect friendly forces from adversary attacks

Question 7

What is Jamming in EA?

Answer 7

A method of EA that aims to disrupt or deny the usage of a communication link or detection system

Question 8

What are the two categories of Jamming?

Answer 8

1. Active
   Emitting signals to interfere with a target’s operation
2. Passive
   Involves techniques such as chaff or decoys to confuse the enemy’s systems

Question 9

What is Spoofing?

Answer 9

False information is introduced into the enemy’s systems, causing them to react to an incorrect situation

Question 10

What are the four factors influencing the effectiveness of an Electronic Attack?

Answer 10

1. Power
2. Frequency
3. Modulation
4. Target

Question 11

What is Jammer to Signal Ratio (JSR)?

Answer 11

A measure that compares the power of a jamming signal to the power of the signal it is attempting to jam

Question 12

What is Critical Jammer to Signal Ratio (CJSR)?

Answer 12

Minimum required JSR needed to effectively jam a signal