Digital Communication - Study Mode
[#146] For the modulated carrier in a quadrature amplitude shift keying (QASK) digital system:
Correct Answer
(C) No signal is orthogonal to any other signal
[#147] A PAM signal can be detected by using
Correct Answer
(B) an integrator
[#148] How many bits are required to divide 10 V into 0.001 V intervals?
Correct Answer
(A) 14 bits
[#149] In a PCM system, if N is the number of levels and Z is the step size, then mean square quantization error is given by:
Correct Answer
(B) $$frac{{{{ ext{Z}}^2}}}{{12}}$$
[#150] Consider the following: 1. Pulse-position modulation 2. Pulse-code modulation 3. Pulse-width modulation Which of the above communications are not digital?
Correct Answer
(C) 1 and 3 only