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Calculate the power received Pr, by a receiving terminal (earth station) at the edge of the satellite transmit beam (edge of coverage area).
What is the extent of the spectrum in the frequency domain? What is the unit that is applied to the magnitude of the spectrum?
An audio signal has a frequency range from 50 Hz to 20 kHz. The signal is sampled, digitized and recorded on magnetic tape as a PCM signal.
From 2 kHz to 20 kHz attenuation increases from 3 dB to 23 dB in a straight line when plotted on axes of power in decibels (vertical axis) against log frequency
A digital communication system transmits binary data using polar NRZ pulses of current over a baseband link with a bandwidth of 20 kHz.
Why is it necessary to include an implementation margin when estimating the BER expected in a real digital communications link?
The receiver in problem 4 has a dynamic range of 78.7 dB. If it has a 6 dB NF preamp (gain = 20 dB) added to its input, find its sensitivity and dynamic range.
An a.c. voltage, V, comprises of a fundamental voltage of 100 V rms at a frequency of 120 Hz, a 3rd harmonic which is 20% of the fundamental.
Use Laplace transforms to compute the solution to the differential equation given below.Compute the Laplace transform of e-10t =u(t).
The midrange open-loop gain of a certain op-amp is 150 dB. Negative feedback reduces this gain by 60 dB. What is the closed-loop gain?
Using the example of a simple RC high-pass filter circuit, show how the inclusion of a coupling capacitor will limit the low frequency of any amplifier circuit
A certain op-amp has an open-loop voltage gain of 100,000 and a common mode gain of 0.2. Determine the CMRR in dB.
Twenty voice signals are to be multiplexed and transmitted over twisted pair. What is the bandwidth required (in bps) if synchronous time division.
From this the inverse z transform to find the output in the time domain due to the step input is determined.
The block diagram of a control system is given below. The inner loop is positive feedback, i.e. Ks>0,and hence the system is unstable.
Suppose the development budget is tight. How might that affect the fact-finding process?What are five important questions to use during fact-finding?
S-R flipflops have a forbidden state that makes them hard to use. Some designers switched to the following flipflop instead.
For a causal LTI system what can you say about the poles of the z transform and the boundary of the region of convergence.
The user is prompted to enter an integer between 1 and 1000. When the user enters the integer, the program uses a repetition control structure.
The forced or damped frequency of oscillation, and the natural or undamped frequency.
What are the respective advantages and disadvantages of the asynchronous and synchronous communication modes from a reliability perspective?
From a given z transform X(z) = {1- z^-10}/{1 - z^-1} the discrete time domain form x(n) is deduced using complex manipulation and inverse transforms.
A Moore sequential circuit has one input and one output.The output goes to 1 when the input sequence 111 has occurred and the output goes.
If the radio in part (e) above receives a signal with power -100.0 dBm, what is the CNR (carrier to noise ratio) in the receiver?
A 12 kHz sine wave signal with a power level -25 dBm is applied to the input of the amplifier. What is the power at the amplifier output in dBm?