List of top Electronics and Communication Engineering Questions

A four level PAM has a input data rate of \(2400~bits/s\) then the symbol rate is
Match the following: A: ASK, B: APK, C: PSK, D: FSK
The random process \(X(t)=A\cos(\omega_0 t+\theta)\) is wide-sense stationary, where \(A\) and \(\omega_0\) are constants and \(\theta\) is a uniformly distributed random variable on the interval \((0,2\pi)\). Then the mean value is
A TDM system is used to multiplex four independent voice signals each sampled at the rate of 8 kHz using PAM. The system incorporates a synchronizing pulse train for its proper operation. Calculate the transmission bandwidth?
What are the conditions for distortion less transmission through a system?
A random process is stationary
The following are properties of auto correlation except
A receiver connected to an antenna whose resistance is \(50~\Omega\) has an equivalent noise resistance of \(30~\Omega\). Calculate the receiver's noise figure?
The quadrature null effect of the coherent detector occur at
To develop the time-domain description of SSB modulation, the required mathematical tool is known as
In the transmission of television signals in practice, a controlled amount of carrier is added to the VSB modulated signal. This is done to use
Prior to sampling, the type of filter used to attenuate high frequency components of the signal that lie outside the band of interest is
Which of the following is used to correct the aperture effect due to flat-top sampling in the sample-and-hold circuit of PAM demodulation?
A FDM system is used to multiplex 24 independent voice signals. SSB modulation is used for the transmission. Given that each voice signal is allotted a bandwidth of 4 kHz, calculate the overall transmission bandwidth of the channel?
The total power in the two side-frequencies of the resulting AM is one third of the total power in the modulated wave when the modulation index is
Error constants of a system are measure of
The incorrect statement with respect to Bode Plots is
The following are the effects of a phase-lead compensation except
For the following Routh's array, the system is
The control system with single pole at origin is
The characteristic polynomial of a system is \[ s^3+2s^2+4s+K. \] The system is marginally stable for
The root locus approaches straight lines as asymptotes approaches
For the system \[ G(s)H(s)=\frac{K(s+a^{2})}{(s+b)^{2}}, \] the break point is
The incorrect option for a Closed loop control system output is
The steady state error for a type 1 system with input of \[ \frac{At^2}{2}u(t) \] is