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Consider the following statements as regards BPSK and QPSK:
| |
A. | 1, 2, 3, 4 [Wrong Answer] |
B. | 1, 2, 3 [Wrong Answer] |
C. | 1, 2, 4 [Correct Answer] |
D. | 2, 3, 4 [Wrong Answer] |
View Answer
Explanation:-
Answer : C Discuss it below : !! OOPS Login [Click here] is required to post your answer/result |
Also Read Similar Questions Below :
⇒ Consider the following statements associated with two port networks.
1, 2, 3
2, 3, 4
1, 3, 4
1, 2, 4
⇒ If γ = (S_{0}/N_{0})/(S_{i}/N_{m}) where S_{0} and S_{1} are signal power output and signal power input and N_{0} and N_{m} are noise power output and noise power input, the value of γ for SSB-SC and DSB-SC amplitude modulated system respectively are
1 and 1
1 and 2
2 and 1
0.5 and 0.5
⇒ If E_{b}, the energy per bit of a binary digital signal is 10^{-6} watt sec. and the one sided power spectral density of the white noise N_{0} = 10^{-5} W/Hz, then the output SNR of the matched filter is
26 dB
10 dB
20 dB
13 dB
⇒ In body centred cubic structure, comers and centre of the cube are occupied by identical atoms.
TRUE
FALSE
⇒ TTL XOR gate is very suitable as LCO driver.
TRUE
FALSE
⇒ If the characteristic equation of a closed loop system is s^{2} + 2s + 2, then the system is :
over damped
critically damped
under damped
undamped
⇒
Both A and R are correct and R is correct explanation of A
Both A and R correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
⇒ The forms of IF statements in FORTRAN 77 are called
logical IF and Block IF
logical IF, block IF and arithmetic IF
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⇒ A 16 bit type ADC uses 1 MHz clock its maximum conversion time is __________ .
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15 ms
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⇒ In a multi-processor configuration two coprocessors are connected to host 8086 processor. The instruction sets of the two coprocessors
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must be disjoint
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⇒ How can the bandwidth of a control system be increased?
By the use of phase lead network
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⇒ Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 Ω and a resistive load is shown in the figu
-0.6
-1
0.6
0
⇒ It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is
chromel constantan
iron constantan
chromel aluminium
platinum-rhodium
⇒ Costa's receiver is used for
coherent detection of AM-SC signal
asynchronous detection of AM-SC signal
amplitude modulation of signal
frequency modulation of signal
⇒ A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
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A = C = 1 and B = 0
⇒ A balun provides an impedance transformation of
0.667361111111111
0.334027777777778
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⇒ While obtaining minimal SOP expression
all do not care terms are ignored
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⇒ A CMOS amplifier when compared to an N-channel. MOSFET, has the advantage of
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⇒ The ideal characteristics of a stabilizer is
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⇒ In the given figure reflection coefficient at loa
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-0.6
0.4
-0.4
⇒ The bandwidth of DSB suppressed carrier modulation system when the modulating frequency varies between 500 Hz and 5 kHz is
555 kHz
505 kHz
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9 kHz
⇒ Between which points does UJT exhibit negative resistance characteristics
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⇒ Which of the following are true for relative dielectric constant?
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⇒ In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is
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⇒ The binary number 0.10110111101 is equal to hexadecimal number
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⇒ The current passing through a resistance of 100 ± 0.2% Ω is 2 ± 0.5% A. The limiting error in computation of power will be
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± 0.9%
± 1.2%
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⇒ In the circuit of fi
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⇒ Consider the following statements as regards DPSK and DEPSK
1 and 3
1 and 2
2 and 3
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⇒ If a piece of wood is placed in a magnetic field
the magnetic field will not be affected
the magnetic lines of force will bend towards the piece
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the flux may increase or decrease
⇒ The first contribution to logic was made by
George Boole
Copernicus
Aristotle
Shannon
⇒ Consider the following statements associated with two port networks.
- Z_{12} = Z_{21}
- Y_{12} = Y_{21}
- h_{12} = h_{21}
- AD - BC = 1
1, 2, 3
2, 3, 4
1, 3, 4
1, 2, 4
⇒ If γ = (S_{0}/N_{0})/(S_{i}/N_{m}) where S_{0} and S_{1} are signal power output and signal power input and N_{0} and N_{m} are noise power output and noise power input, the value of γ for SSB-SC and DSB-SC amplitude modulated system respectively are
1 and 1
1 and 2
2 and 1
0.5 and 0.5
⇒ If E_{b}, the energy per bit of a binary digital signal is 10^{-6} watt sec. and the one sided power spectral density of the white noise N_{0} = 10^{-5} W/Hz, then the output SNR of the matched filter is
26 dB
10 dB
20 dB
13 dB
⇒ In body centred cubic structure, comers and centre of the cube are occupied by identical atoms.
TRUE
FALSE
⇒ TTL XOR gate is very suitable as LCO driver.
TRUE
FALSE
⇒ If the characteristic equation of a closed loop system is s^{2} + 2s + 2, then the system is :
over damped
critically damped
under damped
undamped
⇒
Assertion (A): When an SCR is conducting, the voltage drop across is about 1 V.
Reason (R): When an SCR is conducting, the junction temperature is about 200°C.
Both A and R are correct and R is correct explanation of A
Both A and R correct but R is not correct explanation of A
A is correct but R is wrong
A is wrong but R is correct
⇒ The forms of IF statements in FORTRAN 77 are called
logical IF and Block IF
logical IF, block IF and arithmetic IF
logic IF, block IF, arithmetic IF and negate IF
logical IF and arithmetic IF
⇒ A 16 bit type ADC uses 1 MHz clock its maximum conversion time is __________ .
16 μs
15 ms
6.5 ms
66 ms
⇒ In a multi-processor configuration two coprocessors are connected to host 8086 processor. The instruction sets of the two coprocessors
must be same
may overlap
must be disjoint
must be the same as that of host
⇒ How can the bandwidth of a control system be increased?
By the use of phase lead network
By the use of phase lag network
By the use of both phase-lag and phase-lead network
By the use of cascaded amplifiers in the system
⇒ Voltage standing wave pattern in a loss less transmission line with characteristic impedance 50 Ω and a resistive load is shown in the figu
-0.6
-1
0.6
0
⇒ It is required to measure temperature in the range of 1300-1520°C. The most suitable thermocouple is
chromel constantan
iron constantan
chromel aluminium
platinum-rhodium
⇒ Costa's receiver is used for
coherent detection of AM-SC signal
asynchronous detection of AM-SC signal
amplitude modulation of signal
frequency modulation of signal
⇒ A NOR gate has 3 inputs A, B, C. For which combination of inputs is output HIGH
A = B = C = 0
A = B = C = 1
A = B = 1 and C = 0
A = C = 1 and B = 0
⇒ A balun provides an impedance transformation of
0.667361111111111
0.334027777777778
0.167361111111111
0.0840277777777778
⇒ While obtaining minimal SOP expression
all do not care terms are ignored
all do not care terms are treated as 1
all do not care terms are treated as 0
only such do not care terms which aid minimization are treated as 1
⇒ A CMOS amplifier when compared to an N-channel. MOSFET, has the advantage of
higher cut off frequency
higher voltage gain
higher current gain
lower current drain from the power supply, there by less dissipation
⇒ The ideal characteristics of a stabilizer is
constant output voltage with low internal resistance
constant output current with low internal resistance
constant output voltage with high internal resistance
constant internal resistance and constant output current
⇒ In the given figure reflection coefficient at loa
0.6
-0.6
0.4
-0.4
⇒ The bandwidth of DSB suppressed carrier modulation system when the modulating frequency varies between 500 Hz and 5 kHz is
555 kHz
505 kHz
500 kHz
9 kHz
⇒ Between which points does UJT exhibit negative resistance characteristics
between peak and valley points
before peak point
after peak point
after valley point
⇒ Which of the following are true for relative dielectric constant?
- It is dimensionless.
- It is equal to 1 for vacuum.
- It is equal to 1 for all substances.
1 and 2 only
2 and 3 only
1 and 3 only
1, 2 and 3
⇒ In a C expression using assignment operators, relational operators and arithmetic operators, the hierarchy of operations (in the absence of parenthesis) is
assignment, relational, arithmetic
relational, assignment, arithmetic
arithmetic, assignment, relational
arithmetic, relational, assignment
⇒ The binary number 0.10110111101 is equal to hexadecimal number
B3A
B5A
B7A
BA7
⇒ The current passing through a resistance of 100 ± 0.2% Ω is 2 ± 0.5% A. The limiting error in computation of power will be
± 0.7%
± 0.9%
± 1.2%
± 0.3%
⇒ In the circuit of fi
V_{a} would always lag V_{b}
V_{a} would always lead V_{b}
V_{a} and V_{b} would always be in phase
V_{a} may lag or lead V_{b}
⇒ Consider the following statements as regards DPSK and DEPSK
- DPSK demodulator requires a device which operates at carrier frequency and provides a delay of bit time T_{b}
- In DPSK, synchronous demodulation recovers the signal b(t) and the decoding of b(t) to generate d(t) is done at base band
- In both DPSK and DEPSK errors always occur in pairs
1 and 3
1 and 2
2 and 3
1, 2 and 3
⇒ If a piece of wood is placed in a magnetic field
the magnetic field will not be affected
the magnetic lines of force will bend towards the piece
the magnetic lines of force will bend away from the piece
the flux may increase or decrease
⇒ The first contribution to logic was made by
George Boole
Copernicus
Aristotle
Shannon