1. R-2R is _______ converter |
2. What does Data refer to |
3. The OSI has ______ layers |
4. Protocols deals with |
5. _______ can detect and correct errors in data transmission |
6. Spread spectrum (SS) is a ___________ technique that distributes a signal and its sidebands over a very wide bandwidth.
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7. The most widespread use of SS is in cellular telephones is known as |
8. The two most widely used wideband modulation methods are |
9. QAM uses both |
10. Hartley's Law is mathematically expressed as |
11. FSK, PSK, QAM, OFDM are |
12. Transimssion Efficiency focuses on |
13. Encoding makes data ________ with medium |
14. Companding deals with data |
15. Parallel data transmission is impractical for long-distance communication because of |
16. ASCII and EBCIDC are widely used codes in |
17. In digital codes, data processed and stored by computers can be in |
18. The basic transmission-reception system is a ______ system. |
19. Some examples of linear codes |
20. To avoid aliasing |
21. Analog to digital conversion includes |
22. Which needs re-sending of signal? |
23. The frequency hopping system uses ______ modulation scheme |
24. CDMA rejects |
25. The process of converting the analog sample into discrete form is called |
26. Some advantages of spread spectrum are |
27. The sequence of operations in which PCM is done is |
28. _______ is s benefit of Digital transmission of data |
29. Sampling must be done at______ rate |
30. Sample and Hold Circuit helps the_________ process |
31. Antennas can usually handle transmitting and receiving of electromagnetic waves. This property is called |
32. What is the name given to undesirable interference that is added to a signal being transmitted? |
33. A signal with a wavelength of 1.5 m has a frequency of |
34. A radio wave used in point to point communication consists of |
35. In the electromagnetic wave spectrum, the frequency of radio waves ranges from ??? to ???Hz |
36. A process where the received signal is transformed into its original form is |
37. A device that can perform both modulation and demodulation is called |
38. The process of impressing intelligence on the carrier is called |
39. Which characteristic of a radio receiver refers to its ability to reject an unwanted signal |
40. There is distortion in intelligence when the modulation index, |