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Unformatted text preview: AL- QUDSUNIVERSITYFaculty of EngineeringFinal Exam Time: 2 HoursFebruary 03, 2009Marks: 40Couse: Communication Systems (0331411)Instructor:Dr. Ali JamoosStudent NameRegistration NumberQuestion NumberGradeQ1Q2Q3Q4Q5Q6Q7TotalPlease try to write as clean as possible!Good Luck1Q1)Circle the correct answer: [14 points]1. The modulation technique that is usually used to transmit the TV signals is: (a) AM (b) FM (c) PSK (d) FSK2. Using FDM, the number of TV signals that can be multiplexed on the same coaxial cable whose bandwidth is up to 500MHz:(a) 1000 TV signals (b) 100 TV signals (c) 83 TV signals (d) 830 TV signals3. Using FDM, the bandwidth required to multiplex 100 SSB modulated voice signals is:(a) 100 KHz (b) 200 KHz (c) 300 KHz (d) 400 KHz4. The DS-1 system multiplexes 24 voice channels into one TDM frame and each frame contains 8 bit per channel plus a framing bit. If each voice channel uses PCM with 8000 sample/s, the resulting data rate is: (a) 1.544 Mbps (b) 2.544 Mbps (c) 3.544 Mbps (d) 4.544 Mbps5. To support upstream and downstream data transmission, ADSL uses:(a) TDM (b) FDM (c) CDMA (d) QAM6. The cellular mobile systems are usually assigned a carrier frequency in the:(a) 330 MHz band...
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This note was uploaded on 11/10/2011 for the course COMPUTER E 444 taught by Professor Amigo during the Fall '10 term at Al-Quds University.
- Fall '10