MCQOPTIONS
Saved Bookmarks
MCQOPTIONS
This section includes 13 Mcqs, each offering curated multiple-choice questions to sharpen your Digital Communications knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The transformation of the waveform into a single point in signal space is called as |
| A. | Vector point |
| B. | Predetection point |
| C. | Preamplification point |
| D. | Transformation point |
| Answer» C. Preamplification point | |
| 2. |
In amplitude phase keying each phase vector is separated by |
| A. | 90 |
| B. | 0 |
| C. | 45 |
| D. | 180 |
| Answer» D. 180 | |
| 3. |
The detection method where carrier’s phase is given importance is called as |
| A. | Coherent detection |
| B. | Non coherent detection |
| C. | Coherent detection & Non coherent detection |
| D. | None of the mentioned |
| Answer» B. Non coherent detection | |
| 4. |
THE_TERM_HETERODYNING_REFERS_TO?$ |
| A. | Frequency conversion |
| B. | Frequency mixing |
| C. | Frequency conversion & mixing |
| D. | None of the mentioned |
| Answer» D. None of the mentioned | |
| 5. |
The_transformation_of_the_waveform_into_a_single_point_in_signal_space_is_called_as$ |
| A. | Vector point |
| B. | Predetection point |
| C. | Preamplification point |
| D. | Transformation point |
| Answer» C. Preamplification point | |
| 6. |
In amplitude phase keying each phase vector is separated b? |
| A. | 90 |
| B. | 0 |
| C. | 45 |
| D. | 180 |
| Answer» D. 180 | |
| 7. |
Which modulation scheme is also called as on-off keying method? |
| A. | ASK |
| B. | FSK |
| C. | PSK |
| D. | GMSK |
| Answer» B. FSK | |
| 8. |
The FSK signal which has a gentle shift from one frequency level to another is called as |
| A. | Differential PSK |
| B. | Continuous PSK |
| C. | Differential & Continuous PSK |
| D. | None of the mentioned |
| Answer» C. Differential & Continuous PSK | |
| 9. |
Antipodal signal sets are those vectors that can be illustrated as |
| A. | Two 180 opposing vector |
| B. | Two 90 opposing vector |
| C. | Two 360 opposing vector |
| D. | None of the mentioned |
| Answer» B. Two 90 opposing vector | |
| 10. |
The real part of a sinusoid carrier wave is called as |
| A. | Inphase |
| B. | Quadrature |
| C. | Inphase & Quadrature |
| D. | None of the mentioned |
| Answer» B. Quadrature | |
| 11. |
The coherent modulation techniques are |
| A. | PSK |
| B. | FSK |
| C. | ASK |
| D. | All of the mentioned |
| Answer» E. | |
| 12. |
The detection method where carrier’s phase is given importance is called as$ |
| A. | Coherent detection |
| B. | Non coherent detection |
| C. | Coherent detection & Non coherent detection |
| D. | None of the mentioned |
| Answer» B. Non coherent detection | |
| 13. |
Wavelength and antenna size are related as |
| A. | λ/2 |
| B. | λ/4 |
| C. | 2λ |
| D. | 4λ |
| Answer» C. 2‚âà√≠¬¨‚Ñ¢ | |