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WorksheetsDigital and Analog transmission
Total questions: 20
Worksheet time: 23mins
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
Which of the following are line coding schemes?
Unipolar,
Polar
Multitransition
Bipolar
Multiline
Mention any five line coding characteristics.
Goal in data communications is to (a) the signal rate.
These two signals represents which encoding schemes?
AMI & Pseudoternary
NRZ-L & NRZ-I
Manchester & Differential Manchester
NRZ & AMI
In mBnL coding, first two letters define the ______ pattern, and the second two define the _______ pattern.
Signal, Line
Line, Data
Data, Data
Data, Signal
The two binary, one quaternary (2B1Q) means__________.
the 4-bit patterns encoded as one signal element belonging to a four-level signal
the 2-bit patterns encoded as one signal element belonging to a four-level signal
the 2-bit patterns encoded as one signal element belonging to a two-level signal
the 4-bit patterns encoded as one signal element belonging to a two-level signal
Block coding provides (a) to ensure
synchronization and inherent error detection.
In which technique, eight consecutive zero-level voltages are replaced by the sequence 000VB0VB?
B8ZS
HDB3
8B/10B
All of the above
A PCM encoder includes which three processes?
Sampling
Quantizing
Modulating
Encoding
What is Nyguist Theorem?
What is the bit rate, if we digitize the human voice, assuming 8 bits per sample?
32 kbps
128 kbps
64 kbps
256 kbps
Which are the techniques for serial transmission?
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 (a) .
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
When does we use the constellation diagram?
Quadrature amplitude modulation is a combination of ____________ & ________.
ASK & FSK
FSK & PSK
PSK & QAM
ASK & PSK
