first - AL of EngineeringFirst Exam Time 70 miMarks 25Couse...

Info iconThis preview shows pages 1–3. Sign up to view the full content.

View Full Document Right Arrow Icon

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: AL- QUDSUNIVERSITYFaculty of EngineeringFirst Exam Time: 70 minNovember 01, 2008Marks: 25Couse: Communication Systems (0331411)Instructor:Dr. Ali JamoosStudent NameRegistration NumberQuestion NumberGradeQ1Q2Q3Q4Q5Q6TotalPlease try to write as clean as possible!Good Luck1Q1)Circle the correct answer: [10 points]1. The spectrum of the AM radio signal is in the range:(a) 88–108 MHz band(b) 0.6–1.6 MHz (c) 900–2400 MHz (d) 300–3400 Hz2. If the carrier signal frequency is 900MHz, the corresponding wavelength is:(a) 1/3 m(b) 1/2 m (c) 3 m (d) 2 m3. A sampling rate of 8000 sample/s and a 128 quantization levels are used to generate a PCM signal, the resulting data rate is:(a) 56 Kbps(b) 64 Kbps (c) 40 Kbps (d) 80 Kbps 4. The frequency range of voice channels can be limited to:(a) 88–108 MHz band (b) 0.6–1.6 MHz (c) 900–2400 MHz (d) 300–3400Hz5. The device that converts digital data into analog signal and visa versa is known as:(a) codec (b) modem(c) amplifier (d) repeater6. Given a channel with 5MHz bandwidth, the data rate that can be achieved by QPSK signals is: 6....
View Full Document

{[ snackBarMessage ]}

Page1 / 4

first - AL of EngineeringFirst Exam Time 70 miMarks 25Couse...

This preview shows document pages 1 - 3. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online