QUESTION 8 In selecting a line coding technique, we need to consider the need fo

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QUESTION 8 In selecting a line coding technique, we need to consider the need for receive clock synchronization, and how much frequency bandwidth is occupied by the resulting signal. What is true about the Manchester line coding technique. QUESTION 10 Analog information can be converted into digital data using techniques such as PCM (pulse code modulation). Select the correct statement(s). 1. 1. a. in order to convert an analog signal that consists of an infinite number of values, it must be sampled using the Nyquist sampling theorem a. Manchester occupies less frequency spectrum {i.e. frequency bandwidth), than simpler line coding techniques such as NRZ b. digitized analog signals always experience quantization loss b. Manchester ensures signal transitions for each bit sent, thus helping to ensure receive clock synchronization; hawever, it occupies twice the frequency bandwidth compared to NRZ c. signal aliasing is experienced when samplig falls under the recommended Nyquist sampling c. Manchester ensures greater receive clock synchronization and efficient bandwidth usage compared to NRZ d. all of the above are correct 10 points d there are no true statements listed above QUESTION 11 You want to capture a live music concert and covert it into digital format for transmission. The human ear hasa frequercy bandwidth of approximately 20,000 Hz. Select the best sampling rate and bit depth. 1. 10 points QUESTION 9 Os do not exist prior to being line coded. Select the correct statement s) regarding 4BSB a. since 4BSB eliminates long string of logics" and s", simpler lne coding techniques 1. 4B5B differs from line coding techniques in that is ensures that strings of consecutive "s" and 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 sampless, Bit depth 16 bit per sample d. fs-20,000 sampless, Bit depth 1 bit per sample such as NRZ can be used b. since one bit out of every five bits sent is not real information, the data link suffers from a 1/5 or 20% overhead cost (i.e., reduction in data throughput) c. only 80% of the data sent using 4B5B is real inform ation 10 points d. all of the above are correct statements 10 points

Explanation / Answer

Question 8

1. Answer is B.
Manchester is an NRZ encoding that is exclusively-ORed with the clock. This provides at least one transition per bit, that is Manchester ensures signal transitions for each bit sent, thus helping to ensure receive clock synchronization; however, it occupies twice the frequency bandwidth compare to NRZ and RZ

Question 9:

1. Answer is B.
4B/5B encoding is a type of 'Block coding'. This processes groups of bits rather than outputting a signal for each individual bit (as in Manchester encoding). A group of 4 bits is encoded so that an extra 5th bit is added. Since the input data is taken 4-bits at a time, there are 2^4, or 16 different bit patterns. The encoded bits use 5-bit, and hence have 2^5 or 32 different bit patterns, since one bit out of every five bits sent is not real information, the data link suffers from as 1/5 or 20% overhead cost.

Question 10.

1. Answer is d.

All of the statements given are correct, as from converting an infinitly long analog signal to digital signal, the signal must be amplified and then sampled in accordance to the prescribed technique, while sampling there is always a possibility of quantization loss and signal aliasing is also recommended for the mentioned case.

Question 11.

1. Answer is B.

Music Developers and Composers work with a sampling rate with frequency of 44.1samples/ bit with atleast a bit depth of 24 bits per sample, thus concluding for capturing and digitizing a live concert it will e recommended to use fs = 40,000 samples/bit, with Bit depth of 16 bit pr sample.

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