Posts

SESSIONAL QUESTION BANK D.COM.

SESSIONAL QUESTION BANK D.COM. UNIT-2 Q1. Draw the constellation diagram for the following: (i)                  ASK with peak amplitude of 2 & 4. (ii)                BPSK with peak amplitude of 3. (iii)              QPSK with peak amplitude of 4. Q2. What is the need of digital to analog conversion? Explain ASK in detail and draw the constellation diagram with peak amplitude values of 3 & 6. Q3. Draw the waveform for the transmission of 101101: (i) ASK (ii) FSK (iii) PSK Differentiate amplitude and frequency modulation. Q4. Explain FM with the help of diagram. Give bandwidth equation. Q5. QAM with two different amplitude and four different phase transmit three bit with a single signal. Draw the waveform for 001010100011101000011110 bit pattern. Q6. What is the no. of bits per baud for the following techniques? (i)                  ASK with four different amplitudes. (ii)                FSK with 8 different frequencies. (iii)              PSK with
Post a Comment
Read more

Question Bank Data Communication

QUESTION BANK UNIT TEST W-15 DATA COMMUNICATION 5 th SEM CSE-A Q1) Differentiate between i. Analog & Digital signal ii. Periodic & Aperiodic signal iii. Serial & Parallel transmission iv. Synchronous & asynchronous transmission Q2) Explain in detail transmission impairment. Q3) The power of a signal is 10mV and the power of the noise id 1µW. What are the value of SNR and SNRdB? Q4) A computer monitor has a resolution of 1200 by 1000 pixels. If each pixel uses 1024 colours, how many bits are needed to send the complete contents of a screen? Q5) Explain simplex, duplex, and half duplex with an example Q6) A periodic composite signal with a bandwidth of 3000Hz is composed of two sine waves. The first one has a frequency of 100Hz with maximum amplitude of 30V. The second wave has a maximum amplitude of 10V. Show the sketch for bandwidth. Q7) A periodic composite signal contains frequencies from 20 to 30 kHz each with amplitude of 8V. Draw the f
Post a Comment
Read more