1. When using ASK, FSK or PSK techniques, how can we increase data rate?

		a. by decreasing M and increasing baud rate
		b. Hartleys Law tells us that baud rate will always equal data rate when using ASK, FSK or PSK
		c. by increasing M, we can increase the data rate when compared to the baud rate
		d. by increasing M, we can increase the baud rate when compared to the data rate

2. Hartleys Law represents the relationship between a signals symbol rate (baud rate) and data rate, given the number of levels (M) that a single symbol can take on.

True

False

3. QAM (quadrature amplitude modulation) incorporates both ASK and FSK techniques.

True

False

4. Line coding (i.e., binary data coded in to an electrical signal) produces a baseband signal, whereas ASK, FSK and PSK techniques create a passband signal.

True

False

5. You want to capture a live music concert and covert it into digital format for transmission. The human ear has a frequency bandwidth of approximately 20,000 Hz. Select the best sampling rate and bit depth.

a. fs=40,000 samples/s, Bit depth = 1 bit per sample

b. fs=40,000 samples/s, Bit depth = 16 bit per sample

c. fs=10,000 samples/s, Bit depth = 16 bit per sample

d. fs=20,000 samples/s, Bit depth = 1 bit per sample

6. The bit error rate (BER) of a communications link is influenced by:

a. transmission power

b. modulation method

c. noise

d. all of the above

7. CRC (cyclic redundancy check) is a stronger error detection method than simple parity checking.

True

False

8. ARQ (automatic repeat request) is considered a forward error correction (FEC) technique.

True

False

9. Identify the digital timing method used where the receiver synchronizes its own local clock using the incoming data stream.

a. asynchronous

b. synchronous

c. isochronous

d. plesiochronous

10. Which multiplexing method can be used by analog systems?

		a. frequency division multiplexing (FDM)
		b. time division multiplexing (TDM)
		c. either FDM or TDM
		d. neither FDM or TDM

11. Time division multiplexing (TDM) and frequency division multiplexing (FDM) can be used in tandem together.

True

False

12. What is the Nyquist sampling rate for a signals frequency bandwidth equal to 88 kHz?

		a. fs 88,000 sample/s
		b. fs 176,000 sample/s
		c. fs 176 sample/s
		d. fs 176E6 sample/s