__DATA COMMUNICATIONS__**DEPARTMENT OF CSE (3-1)**

**Faculty: Y.Phani Kumar & R.V.Shasanka**

**TUTORIAL-1 Date: 30-6-2015 & 1-07-2015**

1.A signal with a power of 10mW is transmitted through coaxial cable. Signal level measured at the other end is 5mW. What is the loss of the cable?

2. A 50 ohm transmission line is terminated in an impedance of 20-j50.Calculate the reflection Coefficient?

**TUTORIAL-2 Date: 7-7-2015 & 8-07-2015**

1. The power content of the carrier of an AM wave is 5 kW.Determine the power content of each of the sidebands and the total power transmitted when the carrier is modulated 75%.

2. An AM wave has a power content of 800 W at its carrier frequency. Determine the power content of each of the sidebands for a 90% modulation.

**TUTORIAL-3 Date: 14-7-2015 & 15-07-2015**

1. If a 6-MHz band were being considered for use with the same standards that apply to the 88-108MHz band, how many FM stations can be accommodated?

**TUTORIAL-4 Date: 21-7-2015 & 22-07-2015**

1. Determine the bandwidth of a narrowband FM signal which is generated by a 4-kHz audio signal modulating a 125MHz carrier.

**TUTORIAL-5 Date: 28-7-2015 & 29-07-2015**

1. How much power will an antenna having a radiation resistance of 50 ohm radius when it is fed 20A?

2. What is the radiation resistance of an antenna which radiates 5 kW when it draws 15A?

**TUTORIAL-6 Date: 4-8-2015 & 5-8-2015**

1. An antenna having a radiation resistance of 75 ohm is radiating 10kW.How much current flows into the antenna?

**TUTORIAL-7 Date: 11-8-2015 & 12-8-2015**

1. Determine the Q of an antenna if it has a bandwidth 0f 0.6MHz and is cut to a frequency of 30MHz.

2. How many 600 kHz waves can be on a 5-mile transmission line simultaneously?

**TUTORIAL-8 Date: 8-9-2015 & 9-9-2015**

1. Determine the characteristic impedence of a transmission line which has a capacitance of

35pF/ft and inductance of 0.25 microH/ft.

2. Assume Q=50 find the F and the Bandwidth.

**TUTORIAL-9 Date: 15-9-2015 & 16-9-2015**

1. How many broadcast stations can be accommodated in a 100-kHz bandwidth if the highest modulating frequency is 5 kHz?

**TUTORIAL-10 Date: 29-9-2015 & 30-9-2015**

1. Find the bandwidth of a narrowband FM signal which is generated by a 8-kHz audio signal modulating a 250MHz carrier.

2. Antenna having a radiation resistance of 150ohm is radiating 20kW.How much current flows into the antenna?

**Tutorial-11 Date: 6-10-2015 & 7-10-2015**

1. Determine the power content of the carrier and each of the sidebands for an AM signal having a percent modulation of 80% and a total power of 2500W.

Digital Data Communications : CSE TUTORIALS - Y.Phanikumar, RV Shashank
Reviewed by Suresh Bojja
on
8/25/2015 04:12:00 AM
Rating: