2. For the given parameters, determine the energy per bit-to noise power density ratio.

C = 10e-12 W fb = 60 kbps

N = 1.2 x 10e-14`W B = 120 kHz

3. What would be the fade margin for a path 50 km long over a smooth flat terrain in a relatively

humid region, operating at 6 GHz with a reliability of 99.991%?

4. A transmit channel has a frequency of 837.6 MHz. The received channel frequency is ______.

5. In an AM wave the carrier and one of the sideband is suppressed. If m = 0.5 the percentage saving

in power is?

6. Calculate the gain (isotropic) of a parabolic antenna that has a diameter of 3 m, an efficiency of 60% and operates at a frequency of 4 GHz.

7. This OSI Layer is responsible for network availability, data storage and processor capacity. It also determines the type of dialogue available.

8. The minimum voltage along a transmission line is 260 V, while the maximum voltage is 390 V. The SWR is _____.

9. The type of radio wave responsible for long-distance communications by multiple skips is the ______.

10. A coax has an attenuation of 2.4 db per 100 ft. The attenuation for 275 ft is ____.

11. A pyramidal horn used at 5 GHz has an aperture that is 7 by 9 cm. The gain is about _____.

12. Data transmission of one character at a time with start and stop bits is known as what type of transmission?

13. The product of the bit rate and distance of a fiber-optic system is 2Gbits-km/s. What is the maximum rate at 5 km?

14. An IPv4 has an address space of how many?

15. A multiplexer combines four 100-kbps channels using a time slot of 2 bits, determine the frame duration.