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Questions on bandwidth of digital communincation channels
Problem 1:
A digital signaling system is required to operate at 9600 bps. If a signaling element encodes a 8-bit word, what is the minimum required bandwidth of the channel?
Problem 2:
A given modem represents eight bits with each signaling element. How many different signaling elements are required? What would be the minimum channel bandwidth required to support 56 kbps?
Problem 3:
Consider a communications channel with a passband of 1700 Hz to 15 kHz. A modem will be connected to this communications channel and the modem will operate with a signaling rate that is forty percent (.4) the maximum allowable signaling rate for this communications channel. The modem uses the modulation technique of 128-PSK. What is the data rate (in bits per second) of this modem?
Design a bandpass filter of 'Sallen and Key' topology and having the following characteristics fo = 3.3 kHz, Q = 2.2
What is the maximum symbol rate which can be sent over this link? If a binary line code is used, what is the maximum bit rate? What is the maximum bit rate with 4-ASK symbols?
Determine the Laplace transform of the above signals (use properties of the Laplace transform) including the corresponding region of convergence.
Derive the expression for TRANSFER FUNCTION and write the expression for magnitude and phase of H(f).
Calculating a DC Current through the telephone handset, A telephone handset has a resistance of 600 ohm. It is connected to the local telephone exchange at a distance of 5 km by a twisted pair that has a loop resistance of 200 ohm per km
Laplace transform of a pulse, Consider computing the Laplace transform of a pulse: use the integral formula to find P(s)
Define static electricity and State five sources of static electricity and Describe three methods used to reduce hazards due to static electricity
Explain the operation of sequential logic devices and evaluate the output waveform in relation to the clock for QA, QB and QC in the subsequent circuit and show the binary sequence represented by these waveforms
In this project we will consider the control of a synchronous generator supplying electricity to the grid.
Consider a communications channel with a passband of 3 kHz to 27.4 kHz. A modem will be connected to this communications channel and the modem will operate with a signaling rate that is 0.56 the maximum allowable signaling rate for this communicat..
What is the modulation used to transmit HDTV signals over the air in US terrestrial broadcasting? What is the transmitted bit rate and the compression method?
The basic column control system shown in Figure is somewhat more complicated than the basic neutralizer control system
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