Principals Of Fiber Optic Transmission

Question 0

The part of the fiber optic link that collects light energy and converts it into an electrical signal?

Answer 0

Receiver

Question 1

The part of the fiber optic link that converts an electrical signal into light energy?

Answer 1

Transmitter

Question 2

The part of the fiber optic link that carries light energy form the transmitter to the receiver?

Answer 2

Optical fiber

Question 3

The part of the fiber optic link that attaches to the optical fiber to the fiber optic cable?

Answer 3

Connector

Question 4

What is the strength of a signal, represented by a waveform

Answer 4

Amplitude

Question 5

What are two methods for converting electrical signals into light signals?

Answer 5

Amplitude modulation and pulse code modulation.

Question 6

What is the signal imposed on the carrier in amplitude modulation?

Answer 6

Intelligence

Question 7

True or False: A digital signal is not affected by noise and attenuation the way an analog signal is.

Answer 7

True

Question 8

One binary digit is a?

Answer 8

Bit

Question 9

How many bits of information are in one byte?

Answer 9

8

Question 10

What are the two factors that affect the quality of the digital sample?

Answer 10

Sample rate and quantitizing error

Question 11

What is digitally encoding a analog signal for transmission over a fiber optic link called?

Answer 11

Pulse code modulation

Question 12

The need for an analog signal to be sampled at twice the rate of the expected frequency is what?

Answer 12

Nyquist minimum

Question 13

What is multiplexing?

Answer 13

The process of transmitting many channels over one link

Question 14

What is used to express gain or loss of a fiber optic signal?

Answer 14

Decibel

Question 15

0 dBm power reference is?

Answer 15

1mW

Question 16

What are three rules of thumb when calculating loss or gain?

Answer 16

3 dB is 50% loss and 100% gain
7 dB is 80% loss and 500% gain
10 dB is 90% loss and 1000% gain

Question 17

What is the loss of optical power as the signal passes through the fiber optic link?

Answer 17

Attenuation

Question 18

Attenuation is measured in?

Answer 18

dB

Question 19

Power is measured in?

Answer 19

dBm

Question 20

As frequency increases wavelength?

Answer 20

Decreases

Question 21

Wavelength is measured in?

Answer 21

Nanometers (nm)

Question 22

What are the three most common wavelengths used in fiber optics?

Answer 22

850nm, 1300nm, 1550nm

Question 23

What are the two most common wavelengths used in multimode fiber?

Answer 23

850nm and 1300nm

Question 24

What range does the light used in fiber optics fall in?

Answer 24

Infrared

Question 25

The two most common wavelengths for single mode fiber are?

Answer 25

1310nm and 1550nm

Question 26

What are the four basic components of a fiber optic link?

Answer 26

Transmitter, connectors, receiver, and optical fiber

Question 27

What is a unit of signaling speed equal to the number of signal symbols per second?

Answer 27

Baud