ELECTRONICS SYSTEMS AND TECHNOLOGIES QUESTIONS EASY QUESTION

1. The length of a transmission medium or antenna element expressed as the number of wavelengths of the signal propagating in the medium.

ANSWER: ELECTRICAL LENGTH

2. Geostationary satellites are located at ____ with respect to the equator.

ANSWER: 00 latitude

3. A network with bandwidth of 10 Mbps can pass only an average of 12000 frames per minute with each frame carrying an average of 10000 bits. What is the throughput of this network?

ANSWER: 2 Mbps

4. Which term pertains to the position of a satellite?

ANSWER: EPHEMERIS

5. It is a stacked collinear antenna consisting of half-wave dipoles spaced from one another by one-half wavelengths

ANSWER: Broadside Array

6. What is the fcc assigned channel bandwidth for FM broadcast?

ANSWER: 200 kHz

7. What term indicates (in dB) how far below the load power level to the incident power level measured at any given point in an RF system.

ANSWER: MISMATCH LOSS

8. It is a redundancy error detection scheme that uses parity to determine if a transmission error has occurred within a message and is sometimes called message parity.

ANSWER: Longitudinal redundancy check

9. A block coding technique in which four bits are encoded into a five bit code

ANSWER: 4B/5B Encoding

10. As per ITU-R Recc. V.431-6 Tables 1 & 2 Wavelength Classifications, what is the classification of Super High Frequency?

ANSWER: centimetric

11. An address space is the total number of addresses used by the protocol, such as IPv4 and IPv6. What is the address space of IPv6?

ANSWER: 2^128

12. Who invented the telegraph?

ANSWER: Samuel F.B. Morse13. A phenomenon in optical fibers communication system that is

caused by the difference in the propagation times of light rays that take different paths down the fiber

ANSWER: PULSE SPREADING

14. Circuit for digitizing voice at a low data rate by using knowledge of the way in which voice sounds are produced

ANSWER: VOCODER

15. The lowest portion of the ionosphere that is useful for long-distance communication by amateurs; about 100 to 115 km above the earth is known as the… layer. This is often termed as the Kennely-Heavyside layer.

ANSWER: E LAYER

16. The ratio of the measured power out of a device at room temperature to the power out of a device if the device were noiseless is referred to as _____.

ANSWER: NOISE FIGURE

17. The full-time use of 7 trunks by 14 users results in ________ Erlangs of traffic.

ANSWER: 7

18. It is defined as the shape of the electromagnetic energy radiated from or received by an antenna

ANSWER: radiation pattern

19. The science of measuring only light waves that are visible to the human eye.

ANSWER: Photometry

20. The sensitivity of a radio receiver is given in terms of dBm. If the receiver is receiving 200 mW, what is the corresponding dBm of this signal?

ANSWER: 23 dBm