I just need questions 3-5, and 3-8 i did ither ones
Q3-10. Can we say whether a signal is periodic or nonperiodic by just looking at its frequency domain plot? How? Q3-11. Is the frequency domain plot of a voice signal discrete or continuous? 03-12. Is the frequency domain plot of an alarm system discrete or continuous? 03-13. We send a voice signal from a microphone to a recorder. Is this baseband or broadband transmission? Q3-14. We send a digital signal from one station on a LAN to another station. Is this baseband or broadband transmission? We modulate several voice signals and send them through the air. Is this base- band or broadband transmission? Q3-15. 3.8.3 Problems Given the frequencies listed below, calculate the corresponding periods. P3-1. a. 24 Hz b. 8 MHz c. 140 KHz P3-2. Given the following periods, calculate the corresponding frequencies. a. 5 s b. 12 us c. 220 ns P3-3. What is the phase shift for the following? a. A sine wave with the maximum amplitude at time zero b. A sine wave with maximum amplitude after 1/4 cycle c. A sine wave with zero amplitude after 3/4 cycle and increasing What is the bandwidth of a signal that can be decomposed into five sine waves with frequencies at 0, 20, 50, 100, and 200 Hz? All peak amplitudes are the same. Draw the bandwidth. P3-4. P3-5. A periodic composite signal with a bandwidth of 2000 Hz is composed of two sine waves. The first one has a frequency of 100 Hz with a maximum ampli- tude of 20 V: the second one has a maximum amplitude of 5 V. Draw the bandwidth P3-6. Which signal has a wider bandwidth, a sine wave with a frequency of 100 Hz or a sine wave with a frequency of 200 Hz? P3-7. What is the bit rate for each of the following signals? a. A signal in which 1 bit lasts 0.00I s b. A signal in which I bit lasts 2 ms C. A signal in which 10 bits last 20 s A device is sending out data at the rate of 1000 bps. a. How long does it take to send out 10 bits? b. How long does it take to send out a single character (8 bits)? c. How long does it take to send a file of 100,000 characters? P3-8
