Phase encoded group consists of
1.Manchester coding
2.Bi-phase-mark
3. Miller coding
4.All of the mentioned
Posted Date:-2022-05-20 23:21:13
Adaptive DPCM is used to
1.Increase bandwidth
2.Decrease bandwidth
3.Increase SNR
4.None of the mentioned
Posted Date:-2022-05-20 03:23:02
Application of phase encoded binary signals are
1.Optical communication
2.Magnetic recording
3.Satellite telemetry
4.All of the mentioned
Posted Date:-2022-05-20 23:23:55
Choosing a discrete value that is near but not exactly at the analog signal level leads to
1.PCM error
2.Quantization error
3.PAM error
4.Sampling error
Posted Date:-2022-05-20 03:19:48
Companding is the process of
1.Compression
2.Expansion
3.Compression & Expansion
4.None of the mentioned
Posted Date:-2022-05-20 22:23:41
Delta modulation uses _____ bits per sample.
1.One
2.Two
3.Four
4.Eight
Posted Date:-2022-05-20 03:21:37
DPCM encodes the PCM values based on
1.Quantization level
2.Difference between the current and predicted value
3.Interval between levels
4.None of the mentioned
Posted Date:-2022-05-20 03:21:05
Examples of PCM waveforms are
1.Non return to zero
2.Phase encoded
3.Multilevel binary
4.All of the mentioned
Posted Date:-2022-05-20 23:08:09
In non uniform quantization, the quantization noise is _______ to signal size.
1.Inversely proportional
2.Directly proportional
3.Equal
4.Double
Posted Date:-2022-05-20 22:20:13
In PCM encoding, quantization level varies as a function of ________
1.Frequency
2.Amplitude
3.Square of frequency
4. Square of amplitude
Posted Date:-2022-05-20 03:18:25
In PCM the samples are dependent on ________
1.Time
2.Frequency
3.Quanization leavel
4.Interval between quantization level
Posted Date:-2022-05-20 03:20:26
In pulse modulation, reciprocal of T(time) is
1.Bandwidth
2.Symbol rate
3.Signal voltage
4.None of the mentioned
Posted Date:-2022-05-20 23:28:44
In quantization process, the amount of quantization noise is _______________ to number of levels.
1.Directly proportional
2.Inversely proportional
3.Independent
4.None of the mentioned
Posted Date:-2022-05-20 03:09:18
In which waveform logic 1 and logic 0 are represented by opposite one half bit wide pulses?
1.Unipolar RZ
2.Bipolar RZ
3.RZ-AMI
4.Manchester coding
Posted Date:-2022-05-20 23:22:35
In which waveform logic 1 is represented by equal amplitude alternating pulses?
1.Unipolar RZ
2.Bipolar RZ
3.RZ-AMI
4.Manchester coding
Posted Date:-2022-05-20 23:23:10
In which waveform logic 1 is represented by half bit wide pulse and logic 0 is represented by absence of pulse?
1.Unipolar RZ
2.Bipolar RZ
3.RZ-AMI
4.Manchester coding
Posted Date:-2022-05-20 23:21:47
In which waveform one is represented by half bit wide pulse positioned during the first half and zero is represented by half bit wide pulse positioned in the second half?
1.Bi-p-L
2.Bi-p-M
3.Bi-p-S
4.Delay modulation
Posted Date:-2022-05-20 23:24:40
Non uniform quantization provides better quantization for
1.Weak signals
2.Coarse signals
3.Weak & Coarse signals
4.None of the mentioned
Posted Date:-2022-05-20 22:19:36
NRZ-S is complement of _______
1.NRZ-L
2.NRZ-M
3.NRZ-L & NRZ-M
4.None of the mentioned
Posted Date:-2022-05-20 23:16:50
Quantization noise can be reduced by ________ the number of levels.
1.Decreasing
2.Increasing
3.Doubling
4.Squaring
Posted Date:-2022-05-20 03:17:27
Sample resolution for LPCM ____ bits per sample.
1.8
2.16
3.24
4. All of the mentioned
Posted Date:-2022-05-20 03:22:21
Saturation noises can be avoided or reduced by
1.Automatic gain control
2.Amplifying
3.Filtering
4.None of the mentioned
Posted Date:-2022-05-20 03:09:53
Signal to noise ratio increases as ___________ increases.
1.Quantization level
2.Square of quantization level
3.Square root of quantization level
4.None of the mentioned
Posted Date:-2022-05-20 03:14:19
Signal to noise ratio is infinite when
1.Quantization noise is zero
2.Number of levels are infinite
3.Quantization noise is zero & Number of levels are infinite
4.None of the mentioned
Posted Date:-2022-05-20 03:14:58
The _____________ corresponds to average quantization noise power.
1.Mean
2.Variance
3.Probability density function
4.None of the mentioned
Posted Date:-2022-05-20 03:13:36
The distortion in quantization is called as
1.Round off error
2.Truncation error
3.Round off & Truncation error
4.None of the mentioned
Posted Date:-2022-05-20 03:08:04
The length of the code-word obtained by encoding quantized sample is equal to
1.l=log(to the base 2)L
2.l=log(to the base 10)L
3.l=2log(to the base 2)L
4.l=log(to the base 2)L/2
Posted Date:-2022-05-20 03:16:47
The main sources of corruption are
1.Sampling and quantizing effects
2.Channel effects
3.Sampling, quantizing and channel effects
4.None of the mentioned
Posted Date:-2022-05-20 03:07:15
The output SNR can be made independent of input signal level by using
1.Uniform quantizer
2.Non uniform quantizer
3.Uniform & Non uniform quantizer
4.None of the mentioned
Posted Date:-2022-05-20 22:21:53
The reasons for the threshold effect are
1.Thermal noise
2.Interference from other users
3.Interference from circuit switching transients
4.All of the mentioned
Posted Date:-2022-05-20 03:12:17
The return to zero waveform consists of
1.Unipolar RZ
2.Bipolar RZ
3.RZ-AMI
4.All of the mentioned
Posted Date:-2022-05-20 23:17:22
The size of the quantile interval is called as
1.Inter level
2.Step size
3.Quantile size
4.Level width
Posted Date:-2022-05-20 22:18:11
The standard value of A in A-law is
1.87
2.88
3.86.7
4.87.6
Posted Date:-2022-05-20 23:01:59
Timing jitter can be reduced by
1.Good power supply isolation
2.Stable clock reference
3.Good power supply isolation & Stable clock reference
4.None of the mentioned
Posted Date:-2022-05-20 03:11:23
Uniform quantization provides better quantization for
1.Weak signals
2.Strong signals
3.Weak & Strong signals
4.None of the mentioned
Posted Date:-2022-05-20 22:19:00
What is bit depth?
1.Number of quantization level
2.Interval between two quantization levels
3.Number of possible digital values to represent each sample
4.None of the mentioned
Posted Date:-2022-05-20 03:19:05
What is the standard value of μ in μ-law ?
1.128
2. 255
3. 256
4.0
Posted Date:-2022-05-20 23:01:25
When channel bandwidth is greater than the pulse bandwidth, it causes
1.Intersignal interference
2.Intersymbol interference
3.Bandwidth error
4.None of the mentioned
Posted Date:-2022-05-20 03:12:55
When pulse code modulation is applied to non binary symbols we obtain waveform called as
1.PCM
2.PAM
3.M-ary
4.line codes
Posted Date:-2022-05-20 23:07:25
Which binary waveform uses three levels?
1.Bipolar RZ
2.RZ-AMI
3. Bipolar RZ & RZ-AMI
4.None of the mentioned
Posted Date:-2022-05-20 23:25:27
Which method is called as differential encoding?
1.NRZ-L
2.NRZ-M
3.NRZ-S
4.None of the mentioned
Posted Date:-2022-05-20 23:15:42
Which method is preferred in magnetic tape recording?
1.NRZ-L
2.NRZ-M
3.NRZ-S
4.None of the mentioned
Posted Date:-2022-05-20 23:16:16
Which type is used and preferred in digital logic circuits?
1.NRZ-L
2.NRZ-M
3.NRZ-S
4.None of the mentioned
Posted Date:-2022-05-20 23:08:53
Which type of quantization is most preferable for audio signals for a human ear?
1.Uniform quantization
2.Non uniform quantization
3.Uniform & Non uniform quantization
4.None of the mentioned
Posted Date:-2022-05-20 23:05:15
Which value of μ corresponds to linear amplification?
1.μ=0
2.μ=1
3.μ>0
4.μ<0
Posted Date:-2022-05-20 22:24:16
Which waveform has the feature of error detection?
1.NRZ-L
2.RZ-AMI
3.Manchester coding
4.Duobinary
Posted Date:-2022-05-20 23:26:55
Which waveform scheme introduces bandwidth compression?
1.Duobinary
2.Manchester coding
3.Phase encoded waveform
4.Multilevel codes
Posted Date:-2022-05-20 23:27:29
Which waveform type has better noise immunity?
1.NRZ
2.RZ
3.Phase encoded
4.Multilevel codes
Posted Date:-2022-05-20 23:28:09
Which waveform type has the feature of clocking?
1.Manchester coding
2.Bbi-p-M
3.Delay modulation
4.NRZ-L
Posted Date:-2022-05-20 23:26:04
Which waveforms are also called as line codes?
1.PCM
2. PAM
3.FM
4.AM
Posted Date:-2022-05-20 23:06:43