ITT400 Topic 3 & 4

Line coding, block coding and scrambling are conversion techniques for

• Analog to analog conversion

• Analog to digital conversion

• Digital to analog conversion

• Digital to digital conversion

These two signals represents which encoding schemes?

• AMI & Pseudoternary

• NRZ-L & NRZ-I

• Manchester & Differential Manchester

• NRZ & AMI

A PCM encoder includes which three processes?

• Sampling

• Quantizing

• Modulating

• Encoding

In asynchronous transmission, ____ bit represents start bit & ____ represents stop bit.

• 1, 0

• 1, 1

• 0, 1

• 0, 0

Timing becomes very important in which transmission method?

• Parallel

• Synchronous

• Asynchronous

• Isochronous

Which of the following are Digital-to-analog conversion techniques?

• AM

• QAM

• ASK

• PSK

• FSK

The binary amplitude shift keying is also called as _______.

In phase shift keying, the ______ of the carrier is varied to represent two or more different signal elements.

• Amplitude

• Frequency

• Phase

• All of the above

Quadrature amplitude modulation is a combination of ____________ & ________.

• ASK & FSK

• FSK & PSK

• PSK & QAM

• ASK & PSK

In ___________, we send data several bits at a tie. In __________ we send data one bit a time.

• Parallel transmission; serial transmission

• Serial transmission ; parallel transmission