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Modern Communications
1.Explain in your own words why standards are so important.
2.List 3 standards used in IT and briefly describe them and what they regulate.
3.Describe in you own words how a modem works and what steps the data goes through to be sent from one terminal to another via modem.
4.What can affect /deter modem communications?
Electrical & Instrumentation Use, State typical values for the loading effect on a low voltage AC circuit containing a lamp when measuring current with
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. They occur at random intervals of time. Explain in words how the display on the spectrum screen would..
A 1 kHz sine wave signal with a power level -10 dBm is applied to the input of the amplifier. What is the power at the amplifier output in dBW?
"Divide by 3 clock with 50% duty cycle" is the most commonly asked ASIC design question. This solution gives a simple design in which only 1 counter is required which works only on positive edge of the clock.
Optimum length of the antenna to receive the FM station, An FM radio station transmits at a frequency of 99.9 MHz. A radio receiver has an antenna that is a quarter wavelength monopole consisting of a telescoping rod
Evaluate the size of the solar PV system and Sizing a Solar PV System - What is their monthly average energy use?
Modify the state diagram branching conditions in the diagrams below as needed to ensure the sum and exclusion rules are obeyed in each case.
Determine the voltage required on the input of the amplifier to give the maximum output of 85 dBuV. If the signal level from the aerial is 5 dBmV and the input noise level is 20 dBuV, calculate the signal-to-noise ratio on the output of the amplifi..
What is the peak frequency deviation of the FM signal and bandwidth of the FM signal? The signal is received with CNR = 30.0 dB. What is the SNR of the recovered video signal at the radio receiver output?
What is the bandwidth occupied by this signal, and the noise bandwidth of the receiver for this signal? Find the BER at the receiver output and the average time between errors.
The gain of the antennas must be increased when the TDMA system described in part (d) is used because the bit rate is higher than with FDMA and the noise power in the receiver is therefore higher
Current Pulses over a Twisted Pair Telephone Line, A twisted pair telephone line has a constant attenuation between 0 Hz and 3300 Hz and linear phase shift with frequency
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