Datacom_ELECTRONICS

Question 1

A detectable physical quantity or impulse (as a voltage,
or magnetic field strength) by which messages or information ​can be transmitted

Answer 1

Signal

Question 2

Two Kinds of Signals​

Signal that can take only discrete values​

Answer 2

Digital

Question 3

Two Kinds of Signals​

A signal that can take values within a continuous range

Answer 3

Analog

Question 4

A signal that will have the same value as that of s at time t ​after a time interval T has elapsed

Answer 4

Periodic Signal

Question 5

the instantaneous value of a signal in any time. For ​
electrical the unit is volts.

Answer 5

Amplitude

Question 6

The number of repetitions per unit time. The common​
unit of frequency is repetitions per second or cycles​
per second or Hertz.

Answer 6

Frequency

Question 7

what is used to indicate a relative position and the unit
the same as that for angles​?

Answer 7

Phase

Question 8

Refers to the amount of time, in seconds, a signal needs to complete one cycle

Answer 8

Period

Question 9

refers to the number of periods in one second

Answer 9

Frequency

Question 10

What are the 3 Modulating Techniques?

Answer 10

• Amplitude Shift Keying (ASK)​
• Frequency Shift Keying (FSK)​
• Phase Shift Keying (PSK)​

Question 11

Is another form of angle-modulated digital modulation. four output phases possible for a single carrier frequency with four ​different inputs, with 2 bits per input

Answer 11

Quadrature Phase Shift Keying​