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- 225. Signal to Noise Ratio is the ratio of the two a. Signals b. Powers c. Noise d. Frequencies163. In the case of Phase Modulation (PM), the value of beta (β) is a. Lower b. Greater c. 0 d. Infinity224. The difference in the delay of the signal may create a difference in a. Phase b. Frequency c. Period d. Decibel
- Subject - computer networking The digital signal is to be designed to permit 160 kbps for a bandwidth of 20 kHz. Determine (a) number of levels and (b) S/N ratio.In _______ encoding, the duration of the bit is divided into two halves. The voltage remains at one level during the first half and moves to the other level in the second half. The transition at the middle of the bit provides synchronization. a. Manchester b. differential Manchester c. both (a) and (b) d. neither (a) nor (b)This is an encoding technique which has three voltage levels namely +, - and 0 a. Polar Encoding b. Unipolar Encoding c. NRZ Encoding d. Bipolar Encoding
- In _______ encoding, the duration of the bit is divided into two halves. The voltage remains at one level during the first half and moves to the other level in the second half. The transition at the middle of the bit provides synchronization.In BPSK the bit rate is equal to the baud rate a. True b. FalseIn ________, the amplitude of the carrier signal is varied to create signal elements. Both frequency and phase remain constant. a. ASK b. PSK c. FSK d. QAM
- Quadrature amplitude modulation (QAM) is a combination of ___________.137. Phase shift keying (psk) method is used to modulate digital signals at 9600 bps using 16 levels. Find the line signaling speed (i.e., modulation rate) a. 1200 bands b. 2400 bands c. 3600 bands d. 4800 bandsAn analog signal carries 8 bits per signal element. If 6000 signal elements are sent per second, find the bit rate.