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