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Correlations 2 : Communications 2nd Sem 2526
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A signal travels a distance of 5 ft in the time it takes to complete 1 cycle. What is its frequency?
A 150 ohm resistor operates at room temperature (30 deg C). How much noise power does it provide to a matched load over the bandwidth of 100kHz?
Two resistors, 123 kΩ and 116 kΩ operated in the ambient temperature. Calculate for a bandwidth equal to 300 kHz, the thermal noise voltage of the two resistors connected in parallel.
Calculate the noise current for a diode with a bias current of 35mA, observed over a 250kHz bandwidth.
A microwave antenna (Teq = 60K) is coupled trough a network (Teq = 30 K) to a microwave receiver with Teq = 50 K referred to its input. Calculate the noise power at its input for a 100-MHz bandwidth.
The third symbol in the designation of radio emission under the ITU refers to
The extremely high frequency (EHF) band is in the radio spectrum range of _____________________.
Two resistors, 20kΩ and 50kΩ operated in the ambient temperature. Calculate for a bandwidth equal to 100 kHz, the thermal noise voltage of the two resistors connected in parallel.
The first symbol in the designation of radio signal emission refers to the use of an unmodulated carrier.
Which of the following is not created by nonlinear mixing?