OOK

Question 1

What is the definition of OOK?

Answer 1

The keying on and off of a voltage according to a pre arranged code the carrier turns on to send a 1 and off to send a 0.

Question 2

Expand telegraphic structure?

Answer 2

The Arrangement and polarity of elements employed to convey information.

Examples: morse code and Murray code.

Question 3

Define an element ?

Answer 3

The element is a function of time and it’s polarity may be mark or space.

Question 4

How does mark or space work ?

Answer 4

If the polarity of MARK is binary 1 or voltage high then space will be binary 0 or voltage low.

Question 5

What is a code character ?

Answer 5

An example of code character is the letter L in morse which has multiples of equal length mark and space elements.

Question 6

What is baud ?

Answer 6

THe number of elements transmitted in one second.

Question 7

What is (ETD) element time duration ?

Answer 7

The time taken for a duration of one element to be transmitted. Expressed in milliseconds (ms)

Question 8

What is the formula for ETD?

Answer 8

1000
Element time duration=—— =ms
Bauds

Question 9

What is (FKF) fundamental keying equal to ?

Answer 9

fm = modulating frequency.

Question 10

How do we calculate transmission bandwidth and receiver bandwidth ?

Answer 10

Bauds x5

Bauds x3