1 When using ASK, FSK or PSK techniques, how can we increasedata rate?
| | a. by decreasing \"M\" value |
| | b. Hartley’s Law tells us that baud rate will always equal datarate when using ASK, FSK or PSK |
| | c. by increasing M, we can increase the data rate when comparedto the baud rate |
| | d. by increasing M, we can increase the baud rate when comparedto the data rate |
2 Determine the number of “M†value and number of data bits thatcan be represented using FSK where the possible amplitude valuesare {0 Hz, 60 Hz}.
| | a. M=2, N=1 bit per symbol |
| | b. M=4, N=2 bit per symbol |
| | c. M=6, N=3 bit per symbol |
| | d. M=8, N=3 bit per symbol |
3 Determine the number of “M†value and number of data bits thatcan be represented using ASK where the possible amplitude valuesare {0v, +1v, +2v, +3v, +4v, +5v, +6v, +7v}.
a. M=2, N=1 bit per symbol
b. M=4, N=2 bit per symbol
c. M=6, N=3 bit per symbol
d. M=8, N=3 bit per symbol
4 Determine the number of “M†value and number of data bits thatcan be represented using PSK where the possible amplitude valuesare {0, π/8, π/4, π/2}.
| | a. M=2, N=1 bit per symbol |
| | b. M=4, N=2 bit per symbol |
| | c. M=6, N=3 bit per symbol |
| | d. M=8, N=3 bit per symbol |
5 Select the true statement regarding the relationship betweendata rate (bit rate) and baud rate.
| | a. data rate is the same as baud rate |
| | b. data rate is not dependent upon “M†(i.e., number of valuesthat a symbol can take on) |
| | c. data rate can be equal to or greater than baud rate dependingupon the value of “M†|
| | d. data rate is always less than baud rate |
6 Electrical, electromagnetic, and optical symbols are used torepresent logical (0s and 1s) data. As such, symbol rate is alwaysequal to data rate, and the two terms can be used interchangeably.True / False
7 Unlike analog communications, digital communications do notinvolve the use of sinusoidal carriers during the digitalmodulation process. True/False
