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1.ASK, PSK, FSK and QAM are examples of ______________________ modulation.a.digital to digitalc.analog to analogb.digital to analogd.analog to digitalANS:B2.AM and FM are examples of _________________ modulation.3.In QAM, both phase and __________________ of a carrier frequency are varied.4.Which of the following is most affected by noise?5.If the baud rate is 400 for a 4-PSK signals, the bit rate is __________________ bps.a.100c.800b.400d.1600ANS:C6.If the bit rate for an ASK signal is 1200 bps, the baud rate is _______________________.7.
If the bit rate for an FSK signal is 1200 bps, the baud rate is __________________.
8.In Frequency Shift Keying (FSK) modulation two carrier frequencies produce a composite signal that is:9.Quadrature Amplitude Modulation (QAM) is:a.a combination of ASK and PSK.c.a souped-up version of PSK.b.a combination of ASK and FSK.d.None of the above.ANS:A10.For transmitting digital data signals, a typical telephone line as an approximate bandwidth of:SHORT ANSWER1.List some of the advantages of QAM over ASK or PSK?ESSAY1.Compare and contrast digital to analog modulation with analog to analog modulation.Chapter 6: Forouzan Data Communications and NetworksTRUE/FALSE
Multiplexing is the simultaneous transmission of multiple signals across a single data link.