MCQOPTIONS
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MCQOPTIONS
This section includes 15 Mcqs, each offering curated multiple-choice questions to sharpen your Software Defined Radio knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
The number and characteristics of roofing filter are determined by modulation of the subscriber signal. |
| A. | True |
| B. | False |
| Answer» B. False | |
| 2. |
The required active cancellation is equal to ____ between the maximum non distorting input signal and the radiation level at the antenna. |
| A. | half the difference |
| B. | the difference |
| C. | twice the difference |
| D. | the correlation |
| Answer» C. twice the difference | |
| 3. |
In active radar blanking, communication between RF stage and rest of the communication system is ___ while the control line is ____ |
| A. | on, inactive |
| B. | off, inactive |
| C. | off, active |
| D. | on, absent |
| Answer» C. off, active | |
| 4. |
Active cancellation is the process of introducing transmitted signal in the _____ for subtraction from the input signal. |
| A. | transmitter |
| B. | low pass filter |
| C. | equalizer |
| D. | receiver |
| Answer» E. | |
| 5. |
Which of the following is a characteristic to be possessed by a roofing filter? |
| A. | Low insertion loss |
| B. | Fixed bandwidth |
| C. | High insertion loss and fixed bandwidth |
| D. | High insertion loss |
| Answer» B. Fixed bandwidth | |
| 6. |
A _____filter establishes maximum and minimum possible level for processing. |
| A. | adaptive |
| B. | flooring |
| C. | roofing |
| D. | content |
| Answer» D. content | |
| 7. |
____ separates uplink and downlink. |
| A. | Frequency Division Duplexing |
| B. | Time Division Duplexing |
| C. | Frequency Division Multiplexing |
| D. | Time Division Multiplexing |
| Answer» B. Time Division Duplexing | |
| 8. |
The ______ of out-of-band signal with bandpass characteristic of the receiver gives the interference in the receiver owing to out-of-band energy at the transmitter. |
| A. | correlation |
| B. | correlation and convolution |
| C. | integral |
| D. | convolution |
| Answer» E. | |
| 9. |
Which of the following is not used to control interference at RF? |
| A. | Programmable digital notch filters |
| B. | Active cancellation |
| C. | Frequency separation |
| D. | Antenna separation |
| Answer» B. Active cancellation | |
| 10. |
When ____ of N zero crossings count becomes small, a signal is considered to be present. |
| A. | mean |
| B. | correlation |
| C. | standard deviation |
| D. | variance |
| Answer» E. | |
| 11. |
In which technique RF is amplified until it is hard-limited into a square wave? |
| A. | Super heterodyne receiver |
| B. | One-bit direct conversion digital receiver |
| C. | Two-bit direct conversion digital receiver |
| D. | Phase crossing counter receiver |
| Answer» C. Two-bit direct conversion digital receiver | |
| 12. |
Which of the following is a challenge for direct conversion receiver? |
| A. | GaAs circuitry |
| B. | CMOS circuitry |
| C. | LO leakage and DC bias |
| D. | Difference between CMOS and GaAs circuitry |
| Answer» D. Difference between CMOS and GaAs circuitry | |
| 13. |
Direct conversion receiver is a heterodyne receiver. |
| A. | True |
| B. | False |
| Answer» C. | |
| 14. |
Which of the following is used in base station applications? |
| A. | Super heterodyne receiver |
| B. | Direct conversion receiver |
| C. | Digital-RF receiver |
| D. | Homodyne receiver |
| Answer» B. Direct conversion receiver | |
| 15. |
Which of the following is not present in the conversion stages of super heterodyne receiver? |
| A. | Local oscillator |
| B. | Additional filter |
| C. | Step attenuator |
| D. | Amplifier |
| Answer» D. Amplifier | |