MCQOPTIONS
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MCQOPTIONS
This section includes 14 Mcqs, each offering curated multiple-choice questions to sharpen your Optical Communication knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The digital transmission on implementation of polarization modulation which involves polarization characteristics of the transmitted optical signal is known as _____________ |
| A. | Frequency shift keying |
| B. | Amplitude shift keying |
| C. | Phase shift keying |
| D. | Polarization shift keying |
| Answer» E. | |
| 2. |
_________ can potentially provide spectral conservation through the use of multilevel signalling. |
| A. | M-ary PSK |
| B. | MFSK |
| C. | ASK |
| D. | DFSK |
| Answer» B. MFSK | |
| 3. |
External modulation for ________ modulation format allows the most sensitive coherent detection mechanism. |
| A. | FSK |
| B. | DSK |
| C. | PSK |
| D. | ASK |
| Answer» D. ASK | |
| 4. |
EXTERNAL_MODULATION_FOR__________MODULATION_FORMAT_ALLOWS_THE_MOST_SENSITIVE_COHERENT_DETECTION_MECHANISM.?$ |
| A. | FSK |
| B. | DSK |
| C. | PSK |
| D. | ASK |
| Answer» D. ASK | |
| 5. |
The digital transmission on implementation of polarization modulation which involves polarization characteristics of the transmitted optical signal is known as _____________$ |
| A. | Frequency shift keying |
| B. | Amplitude shift keying |
| C. | Phase shift keying |
| D. | Polarization shift keying |
| Answer» E. | |
| 6. |
_________ can potentially provide spectral conservation through the use of multilevel signalling.$ |
| A. | M-ary PSK |
| B. | MFSK |
| C. | ASK |
| D. | DFSK |
| Answer» B. MFSK | |
| 7. |
Eight level FSK and binary PSK yields an equivalent sensitivity. State whether the given statement is true or false? |
| A. | False |
| B. | True |
| Answer» C. | |
| 8. |
___________ offers the potential for improving the coherent optical receiver sensitivity by increasing the choice of signalling frequencies. |
| A. | MFSK |
| B. | MDSK |
| C. | MPSK |
| D. | MASK |
| Answer» B. MDSK | |
| 9. |
The frequency deviation at frequencies above 1 MHz is typically ____________ |
| A. | 10 to 20 mA<sup>-1</sup> |
| B. | 100 to 500 mA<sup>-1</sup> |
| C. | 1000 to 2000 mA<sup>-1</sup> |
| D. | 30 to 40 mA<sup>-1</sup> |
| Answer» C. 1000 to 2000 mA<sup>-1</sup> | |
| 10. |
________ does not require an external modulator. |
| A. | FSK |
| B. | DSK |
| C. | PSK |
| D. | ASK |
| Answer» B. DSK | |
| 11. |
______________ is also referred to as on-off keying (OOK). |
| A. | FSK |
| B. | DSK |
| C. | PSK |
| D. | ASK |
| Answer» B. DSK | |
| 12. |
The line width in the range ________ of bit rate is specified for ASK heterodyne detection. |
| A. | 8% |
| B. | 2 to 8% |
| C. | 10 t0 50% |
| D. | 70% |
| Answer» D. 70% | |
| 13. |
Almost _________ of the transmitter power is wasted in the use of external modulators. |
| A. | Half |
| B. | Quarter |
| C. | One-third |
| D. | Twice |
| Answer» B. Quarter | |
| 14. |
_____________ is essentially a crude form of Amplitude shift keying. |
| A. | Analog modulation |
| B. | Digital intensity modulation |
| C. | Photodetector |
| D. | Receiver structure |
| Answer» C. Photodetector | |