In TDM, at the receiver end, ____ filter is used.
1.Low pass
2.High pass
3. Band pass
4.Band stop
Posted Date:-2022-05-22 09:36:24
A PAM signal can be detected using
1.Low pass filter
2.High pass filter
3.Band pass filter
4.All pass filter
Posted Date:-2022-05-22 08:02:47
A PWM signal can be generated by
1.An astable multi vibrator
2.A monostable multi vibrator
3.Integrating a PPM signal
4.Differentiating a PPM signal
Posted Date:-2022-05-22 08:06:22
An amplifier uses ______ to take input signal.
1.DC power
2.AC power
3.DC & AC power
4.None of the mentioned
Posted Date:-2022-05-22 08:10:43
Analogue switches provides
1.Good bandwidth
2.Low distortion
3.Low cost
4.All of the mentioned
Posted Date:-2022-05-22 08:21:30
Class B linear amplifiers have maximum power efficiency of
1.50%
2.75%
3.78.5%
4.None of the mentioned
Posted Date:-2022-05-22 08:12:12
Coherent demodulation of FSK signal can be performed using
1.Matched filter
2.BPF and envelope detectors
3.Discriminator
4.None of the mentioned
Posted Date:-2022-05-22 08:03:18
Delta modulation is ______ conversion.
1.Analog to digital
2.Digital to analog
3.Analog to digital and digital to analog
4.None of the mentioned
Posted Date:-2022-05-22 08:15:05
Flat top sampling of low pass signals
1.Gives rise to aperture effect
2.Implies over sampling
3.Leads to aliasing
4.Introduces delay distortion
Posted Date:-2022-05-22 08:01:32
For non coherent reception of PSK _____ is used.
1.Differential encoding
2.Decoding
3.Differential encoding & Decoding
4.None of the mentioned
Posted Date:-2022-05-22 08:09:36
For which quantization process is used?
1.Amplitude discretization
2.Time discretization
3.Amplitude & Time discretization
4.None of the mentioned
Posted Date:-2022-05-22 09:33:01
Free space in idealization which consists
1.Transmitter
2.Receiver
3.Transmitter & Receiver
4.None of the mentioned
Posted Date:-2022-05-22 08:13:16
In a delta modulation system, granular noise occurs when the
1.Modulating signal increases rapidly
2.Pulse rate decreases
3.Pulse amplitude decreases
4.Modulating signal remains constant
Posted Date:-2022-05-22 08:02:10
In an ideal TDM system, the cross correlation between two users of the system is
1.1
2.0
3.Infinity
4.-1
Posted Date:-2022-05-22 08:07:15
In bipolar codes, pulses can be
1.Positive
2.Negative
3.Absent
4.All of the mentioned
Posted Date:-2022-05-22 08:14:25
In channel encoding procedure
1.Redundancy bits are added
2.Errors are corrected
3.Redundancy bits are added & Errors are corrected
4. None of the mentioned
Posted Date:-2022-05-22 08:18:14
In finite state machines, output is predicted using
1.Past output
2.Present input
3.Past output & Present input
4.None of the mentioned
Posted Date:-2022-05-22 07:56:22
In M-ary FSK as M tends to infinity, probability of error tends to
1.Infinity
2.Unity
3.Zero
4.None of the mentioned
Posted Date:-2022-05-22 08:09:04
In M-ary FSK, as M increases error
1.Increases
2.Decreases
3.Does not get effected
4.Cannot be determined
Posted Date:-2022-05-22 08:08:33
In TCM channel capacity can be increased.
1.True
2.False
Posted Date:-2022-05-22 07:59:13
In TCM the signals are decoded using
1.Soft decision decoders
2.Hard decision decoders
3. Soft & Hard decision decoders
4.None of the mentioned
Posted Date:-2022-05-22 07:57:23
In time division system, the actual switch is called as
1.Speech memory
2.Cross point
3.Connecting point
4.None of the mentioned
Posted Date:-2022-05-22 08:20:28
In time division, connection is established using
1.Data exchange
2.Galvanic connection
3.Data exchange & Galvanic connection
4.None of the mentioned
Posted Date:-2022-05-22 08:21:01
Modulation process corresponds to ______ the amplitude, frequency or phase.
1.Switching
2.Keying
3.Switching or keying
4.None of the mentioned
Posted Date:-2022-05-22 09:33:41
Modulation process includes
1.Analog to digital conversion
2.Digital to analog conversion
3.All of the mentioned
4.None of the mentioned
Posted Date:-2022-05-22 08:18:51
Operations performed by switching system
1.Path establishment
2.Information exchange
3.Tariff computation
4.All of the mentioned
Posted Date:-2022-05-22 08:22:06
PCM includes the process of
1.Amplitude discretization
2.Time discretization
3.Amplitude & Time discretization
4.None of the mentioned
Posted Date:-2022-05-22 09:30:28
Properties used to determine stream’s fidelity
1.Sampling rate
2.Bit depth
3.Sampling rate & Bit depth
4.None of the mentioned
Posted Date:-2022-05-22 08:13:56
Source of noise in delta modulation is
1.Granularity
2.Slope overload
3.Granularity & Slope overload
4.None of the mentioned
Posted Date:-2022-05-22 08:16:54
Space division has dedicated
1.Paths
2.Time slots
3.Paths & Time slots
4.None of the mentioned
Posted Date:-2022-05-22 08:19:56
Switching exists in
1.Point to point communication
2.Broadcast communication
3.Point to point & Broadcast communication
4.None of the mentioned
Posted Date:-2022-05-22 08:19:26
TDM is less immune to cross-talk in channel than FDM.
1.True
2.False
Posted Date:-2022-05-22 08:06:42
TDM requires
1.Constant data transmission
2. Transmission of data samples
3.Transmission of data at random
4.Transmission of data of only one measured
Posted Date:-2022-05-22 08:07:50
The demodulator in delta modulation technique is
1.Differentiator
2.Integrator
3.Quantizer
4.None of the mentioned
Posted Date:-2022-05-22 08:16:05
The TCM decoder uses
1.Minimum likelihood detector
2.Maximum likelihood detector
3.Does not use redundant bits
4.None of the mentioned
Posted Date:-2022-05-22 08:00:50
The use of non uniform quantization leads to
1.Reduction in transmission bandwidth
2.Increase in maximum SNR
3.Increase in SNR for low level signals
4.Simplification of quantization process
Posted Date:-2022-05-22 08:03:56
Time division multiplexing uses
1.High pass filter
2.Commutator
3.High pass filter & Commutator
4.None of the mentioned
Posted Date:-2022-05-22 09:35:50
To achieve high signal to noise ratio, delta modulation must use
1.Under sampling
2.Over sampling
3.Aliasing
4.None of the mentioned
Posted Date:-2022-05-22 08:15:36
Transmission bandwidth depends on
1.Rate of signalling
2.Density of signal points
3.Reduced distance
4.None of the mentioned
Posted Date:-2022-05-22 07:59:47
Trellis coded modulation scheme
1.Has memory
2. Is memory-less
3.Needs more bandwidth
4.None of the mentioned
Posted Date:-2022-05-22 07:58:26
When probability of receiving a symbol is 1 then how much information will be obtained?
1.Little information
2.Much information
3.No information
4.None of the mentioned
Posted Date:-2022-05-22 08:17:32
Which determines the error performance in TCM?
1.Reduced distance
2.Free distance
3.Bandwidth
4.None of the mentioned
Posted Date:-2022-05-22 08:00:17
Which generates high distortion?
1.Class A
2.Class B
3.Class C
4.Class AB
Posted Date:-2022-05-22 08:11:41
Which has 50% maximum power efficiency?
1.Class A
2.Class B
3.Class AB
4.None of the mentioned
Posted Date:-2022-05-22 08:11:14
Which has higher error probability performance?
1.Uni-polar base-band signalling
2.Bipolar base-band signalling
3.ASK
4.FSK
Posted Date:-2022-05-22 09:35:12
Which has same probability of error?
1.ASK and FSK
2.ASK and PSK
3.PSK and FSK
4. None of the mentioned
Posted Date:-2022-05-22 09:34:40
Which has the maximum power efficiency?
1.Class A
2.Class B
3.Class C
4.Class AB
Posted Date:-2022-05-22 08:12:45
Which modulation technique have the same bit and symbol error probability?
1.BPSK
2.DPSK
3.OOK
4.All of the mentioned
Posted Date:-2022-05-22 08:10:10
Which of the following requires a synchronizing signal?
1.Single channel PPM system
2.PAM
3.DM
4.All of the mentioned
Posted Date:-2022-05-22 08:05:32
Which provides more secure communication?
1.CDMA
2.FDMA
3.TDMA
4.None of the mentioned
Posted Date:-2022-05-22 09:36:54