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If the digital outputs of three identical video cameras are combined onto a single cable using time division multiplexing, what is the bit rate on the cable?
Consider a spectrum analyzer and suppose that V1 = 5 V, V2 = 0.1 V, V3 = 0.4 V, and V4 = 0.2 V. What is the total harmonic distortion?
If the unity gain frequency is 5 MHz and the midband open-loop voltage gain is 200,000, what is the cutoff frequency?
A spectrum analyzer is connected to an unknown signal. The spectrum analyzer displays the power level of signals in dBm vertically and frequency horizontally.
The waveform output by the signal generator in part (b) is changed so that the rectangular pulses have the same width but no longer are periodic.
The sampling rate is to be 1.2 times the Nyquist rate. What is the sampling frequency?What is the bit rate at the output of the ADC?
A twisted pair telephone line is equipped with an equalizer that ensures the line has a constant attenuation between 300 Hz and 3300 Hz.
What RF bandwidth must the radio link provide if the modulation is binary phase shift keying (BPSK)?
If the filters in the transmitter and receiver are changed for ideal RRC filters with roll off factor r = 0.25, what is the maximum symbol rate for this link?
A logical 1 is transmitted over the link. A noise spike of +150 mV is added to the signal at the instant it is sampled by the receiver. Will this cause a bit er
What is the BER at the output of the receiver in clear air conditions, and the average time between errors? Give your answer in years, days.
For what percentage of the time is the noise output of the receiver greater than + 2.0 V or more negative than -2.0 V?
A radio transmitter operates at a carrier frequency of 99.1 MHz. The transmitter has an intermediate frequency of 10.0 MHz.
A baseband digital data link transmits polar binary NRZ current pulses at a rate of 1.0 Msps. The link uses ideal RRC filters with roll off factor r = 0.5.
A digital radio link operates at a frequency of 75 MHz and uses ideal RRC filters with roll off factor r = 0.2 in the transmitter and receiver.
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?