Digital Communication System MCQs
Practice free Digital Communication System multiple-choice questions with instant answer feedback and step-by-step solutions. Click an option to check yourself, reveal the full explanation, and work through all 252 questions — no login required.
Question 190easy
The bandwidth of a PCM system having two quantization levels is B. If the quantization level is increased to 8, the resultant bandwidth will be
Question 191easy
For the Hamming black code, if "n' be total word length of the block and 'k' be the number of information bits, then an allowable code of this (n, k) family of Hamming code is
Question 192easy
Consider the following statements : In comparison to PCM, a DM system suffers from the disadvantages of 1. slops overload; distortion 2. larger bandwidth 3. more complex circuitry 4. inferior performance Which of these statements is/are correct?
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Question 193easy
Good voice reproduction via PCM requires 128 quantization levels. If the bondwidth of voice channel is 4 kHz, the data rate is
Question 194easy
The bit rate of a digital communication system is 34 M bit/s. The modulation scheme is QPSK. The baud rate of the system is
Question 195easy
A TDM link has 20 signal channels and each channel is sampled 8000 times/sec. Each sample is represented by seven binary bits and contains an additional bit for synchronization. The total bit rate for the TDM link is
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Question 196easy
In a certain '12 channel TDM' system, it is found that channel No. 3 andchannel No. 8 are connected to thesame input signal. This technique
Question 197easy
If carrier moudlated by a digital bit stream had one of the possible phases of 0, 90, 180 and 270 degrees, then the modulation is called
Question 198easy
A TDM link has 20 signal channels and each channel issampled 8000 times/sec. Each sample is represented by seven binary bits and contains an additional bit for synchronization. The total bit rate for theTDM link is