WorksheetsDC LAB CYCLE 1 QUIZ
Total questions: 50
Worksheet time: 50mins
Analog to digital conversion includes
Sampling
Quantization
Sampling & Quantization
None of the mentioned
Two binary values are represented by two different frequencies
FSK
ASK
PSK
DPSK
ASK is a result of combination of shift keying and
Digital Modulation
Analog Modulation
Amplitude Modulation
Delta Modulation
The qualifier Differential to PSK means that
it uses phase shift of 180 degrees
it uses phase shift of 0 degrees
it uses phase shift of 90 degrees
it uses phase shift of 270 degrees
In PCM
PAM samples are quantized
non linear coding scheme is undertaken
digital signal is converted to analog signal
A signal can be recovered from its sample by using
Low pass filter
High pass filter
Band pass filter
Band stop filter
The output of sampling process are called as ________
Pulse code modulation
Pulse amplitude modulation
In PCM encoding, quantization level varies as a function of ________
Frequency
Amplitude
In PCM the samples are dependent on _______
Time
Frequency
Delta modulation uses _____ bits per sample.
1
2
3
4
Companding is the process of
Compression
Expansion
Compression & Expansion
Which value of μ corresponds to linear amplification?
μ=0
μ=1
μ>0
μ<0
Which type of quantization is most preferable for audio signals for a human ear?
Uniform quantization
Non uniform quantization
The process of converting the analog sample into discrete form is called
MODULATION
MULTIPLEXING
QUANTIZATION
SAMPLING
The sequence of operations in which PCM is done is
Sampling, quantizing, encoding
Quantizing, encoding, sampling
Quantizing, sampling, encoding
In digital transmission, the modulation technique that requires minimum bandwidth is
Delta modulation
PCM
DPCM
PAM
Modulation refers to a low frequency signal controlling the
amplitude of the carrier
frequency of the carrier
phase of the carrier
any of the above
Noises are variations in
amplitude
frequency
phase
both phase and frequency
The sequence of binary digits from the source encoder is passed to the _________
transmitter
channel encoder
digital modulator
channel decoder
What are the three different types of multiplexing?
TDMA, FDMA, CDMA
TDAM, FDMA, SDMA
TDD, FDMA, CDMA
FDD, TDD, TDMA
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 Digital-to-analog conversion techniques?
AM
QAM
ASK
PSK
FSK
Quadrature amplitude modulation is a combination of ____________ & ________.
ASK & FSK
FSK & PSK
PSK & QAM
ASK & PSK
A signal that uses binary code (1s and 0s). It provides a constant and consistent signal.
analog
digital
binary
encrypted
Digital or analogue?
Digital signal
Analog signal
The original sender of the message, which could be a person or a machine
destination
source
transmitter
receiver
An electronic device that produces radio waves - or the device that sends the message.
receiver
transmitter
encoder
digital signal
Device that captures radio signals to convert signals into a usable or readable form
decoder
receiver
transmitter
communication
A device, circuit, software program, or person that converts information from the source into another format to prepare for transmission.
transmitter
receiver
decoder
encoder
The range of wavelengths or frequencies over which electromagnetic radiation extends. Includes radio waves, microwaves, visible light, etc.
color spectrum
electromagnetic spectrum
transmission spectrum
communication spectrum
The process of approximating the continuous set of values with a finite set of values is called _________ .
Modulation
Quantization
Sampling
Approximation
Select the correct order of blocks in PCM transmitter.
Encoder, Quantizer, Sampler, Low pass filter.
Low pass filter, Sampler, Quantizer, Encoder.
Low pass filter, Quantizer, Sampler, Encoder.
Low pass filter, Encoder, Sampler, Quantizer.
PCM Transmitter doesn't consist this block.
Low pass filter
Sampler
Amplifier
Encoder
Quantization noise ____________ the SNR of a signal.
reduces
increases
Each quantized sample is assigned the binary code that represents the discrete amplitude value closest to the pulse's actual value. This is known as ________
Quantization
Sampling
Encoding
Decoding
The process of compensating for the effects of amplitude and phase distortion produced by the channel is _______.
Timing
Equalization
Decision making
None of these
The process of assigning time instants when the probability of making of a wrong decision is minimum is called _______ .
error
Equalization
Timing
sampling
Select the quantization techniques..
Linear quantization
Uniform quantization
Non-uniform quantization
Non-linear quantization
A (a) quantizer uses equal length quantization intervals linearly related to analog sample values.
Identify the quantization technique.
Uniform quantization
Non uniform quantization
A digitization technique that makes use of the sample-to-sample redundancies in an analog waveform.
Pulse Code Modulation
Delta modulation
DPCM is a process of converting an analog signal into a digital signal.
True
False
Identify the type of modulation
PAM
PPM
PWM
PCM
Sampling is a process in which _________ of continuous time signal is measured at discrete instants
Frequency
Amplitude
Phase
Wavelength
Identify the modulation technique followed to obtain the above shown modulated signal
ASK
FSK
PSK
MSK
