In Opreating systems Why does the wait decrease the value of the semaphore and why does an increase in the signal increase the value of the semaphore?
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- In operational systems Why does the delay reduce the value of the semaphore while an increase in the signal increases the value of the semaphore?Feedback is often employed to prevent a rapidly transmitting transmitter from overwhelming a slowly receiving receiver with data. Why is this technique referred to as flow control?How semantics of the signal function varies ?
- _____ signals can have an infinite number of values in a range.In ________, the phase of the carrier is varied to represent two or more different signal elements. Both peak amplitude and frequency remain constant. a. ASK b. PSK c. FSK d. QAMWhat is the significance of the signal function and how does it change?
- Block coding can help in _______ at the receiver. a. Synchronization b. Error detection c. Attenuation d. both (a) and (b)Q2(b) A signal travels from point A to point B. At point A, the signal power is 300 W. At point B, the power is 280 W. What is the attenuation in decibels?________ is a type of transmission impairment in which the signal loses strength due to the different propagation speeds of each frequency that makes up the signal. a. Attenuation b. Distortion c. Noise d. Decibel