1.
The maximum synchronizing capability in coding techniques is present in
A
Polar NRZ
B
Polar RZ
C
Manchester format
D
Polar quaternary NRZ
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The maximum synchronizing capability in coding techniques is present in
Polar NRZ
Polar RZ
Manchester format
Polar quaternary NRZ
The digital modulation scheme in which the step size is not fixed is
Adaptive delta modulation
DPCM
Delta modulation
PCM
DPCM suffers from
Quantization noise
Both a & b
Slope over load distortion
None of the above
In digital transmission, the modulation technique that requires minimum bandwidth is
PCM
DPCM
Delta modulation
PAM
In Delta modulation,
All the coded bits used for sampling are transmitted
The step size is fixed
One bit per sample is transmitted
Both a and c are correct
The sequence of operations in which PCM is done is
Quantizing, encoding, sampling
Quantizing, sampling, encoding
Sampling, quantizing, encoding
None of the above
The process of converting the analog sample into discrete form is called
Multiplexing
Quantization
Modulation
Sampling
The technique that may be used to reduce the side band power is
BPSK
Gaussian minimum shift keying
MSK
BFSK
BPSK system modulates at the rate of
2 bit/ symbol
4 bit/ symbol
1 bit/ symbol
None of the above
The probability of error of DPSK is …………. than that of BPSK
Lower
Same
Higher
Not predictable
ASK modulated signal has the bandwidth
Half the bandwidth of baseband signal
Double the bandwidth of baseband signal
Same as the bandwidth of baseband signal
None of the above
The Nyquist theorem is
Helps in quantization
Limits the bandwidth requirement
Relates the conditions in time domain and frequency domain
Both a and c
Nyquist criterion helps in
Reduction in transmission bandwidth
Increase in transmission bandwidth
Transmitting the signal without ISI
Both a and b
Pulse shaping is done
by limiting the bandwidth of transmission
after line coding and modulation of signal
to control Inter Symbol Interference
All of the above
The number of bits of data transmitted per second is called
Modulation rate
Coding
Data signaling rate
None of the above
Run Length Encoding is used for
Bit error correction
Correction of error in multiple bits
Reducing the repeated string of characters
All of the above
Parity check bit coding is used for
Error detection
Error correction and detection
Error correction
None of the above
Parity bit coding may not be used for
Which bit is in error
Both a & b
Error in more than single bit
None of the above
A linear code
All-zero code word is a code word
Minimum hamming distance between two code words is equal to weight of any non zero code word
Sum of code words is also a code word
All of the above
Timing jitter is
Change in frequency
Deviation in location of the pulses
Change in amplitude
All of the above