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Working professionals and students may find it tough to carve out time from their hectic schedules to get to the gym every day for a workout due to workload and studies. As a result, many people prefer to exercise at home instead of going to the gym. On the other hand, a gym workout or exercise done without following the required processor positions and without the supervision of a trainer might cause muscular damage. Additionally, hiring a personal trainer may not be within everyone''''s financial means.
By observing this situation suppose you are going to develop a mobile application, which will act as a virtual trainer. This application will guide the users on various body exercises with step-by-step positions with images. The users can keep a track of the data of day-to-day exercises. As a requirement engineer, which requirement elicitation technique will remain better for developing this application? Justify your answer with valid reasons in 3 to 4 lines only.
Which requirement elicitation technique will remain better for developing virtual trainer application?
How does increasing the temperature of a component affects its noise power?
How does narrowing the bandwidth of a circuit affect the noise level?
True or false? The noise at the output of a receiver is less than the noise at the input. Explain your answer
What does a high value for signal-to-noise power ratio imply? How about a low signal-to-noise power ratio?
The circuits in a superheterodyne receiver have the following gains: RF amplifier, 8 dB; mixer, -2.5 dB; IF amplifier, 80 dB; demodulator, -0.8 dB; audio amplifier, 23 dB. What is the total gain?
The signal input power to a receiver is 6.2 nW. The noise power is 1.8 nW. What is the S/N ratio? What is the S/N ratio in decibels?
A receiver with a 75-Ω input resistance operates at a temperature of 31°C. The received signal is at 89 MHz with a bandwidth of 6 MHz. The received signal voltage of 8.3 μV is applied to an amplifier with a noise figure of 2.8 dB. Find (a) the input noise power, (b) the input signal power, (c) S/N, in decibels, (d) the noise factor and S/N of the amplifier, and (e) the noise temperature of the amplifier.
An RF amplifier has an S/N ratio of 8 at the input and an S/N ratio of 6 at the output. What are the noise factor and noise figure?
