Transmission Methods and Modes

Question 1

Three basic communication channels

Answer 1

• Simplex
• Half Duplex
• Full Duplex

Question 2

Describe analog signalling

Answer 2

Signal that varies in amplitude, frequency and/or phase in response to changes in sound, light, heat etc

Question 3

Describe digital signalling

Answer 3

Represents 1 or 0
less interference when used over long distance

Question 4

Parallel Mode is used to?

Answer 4

connect 2 pieces of equipment a few metres apart

Question 5

Serial Mode is used to?

Answer 5

transfer digital data in a serial fashion 1 bit after another

Question 6

What is Serial-In-Parallel-Out

Answer 6

character loaded serially and then shifted out in parallel

Question 7

What is Parallel-In-Serial-Out

Answer 7

character loaded parallel then shifted out serially

Question 8

What does UART stand for

Answer 8

Universal Asynchronous Receiver/Transmitter

Question 9

What is UART

Answer 9

a microchip that controls a computers interface to its attached serial device

Question 10

What does that UART also do (2 things)

Answer 10

• converts bytes it receives (Parallel) into a single serial bit stream for outbound transmission
• Inbound transmission converts serial bit stream into bytes for computer

Question 11

Describe Synchronous Transmission

Answer 11

continuous and consistent timed transfer of data blocks

Question 12

Describe Asynchronous Transmission

Answer 12

data encoded with start and stop bits