MCQ in Modulation Part 9 – Answers

Below are the answers key for the Multiple Choice Questions in Modulation Part 9.

401. A reduction in receiver sensitivity because of a strong signal on a nearby frequency

402. Desensitizing

403. Quieting

404. Ensure good RF shielding between the transmitter and receiver

405. Modulation from an unwanted signal is heard in addition to the desired signal

406. Cross-modulation interference

407. By installing a filter at the receiver

408. The modulation of an unwanted signal is heard on the desired signal

409. The loudest signal received is the only demodulated signal

410. A detector that uses mixing process with a locally generated carrier

411. Capture effect

412. The recovery of intelligence from the modulated RF signal

413. Rectification and filtering of RF

414. By a frequency discriminator

415. The combination of the two signals to produce sum and difference frequencies

416. A circuit for detecting FM signals

417. The original frequencies and the sum and difference frequencies

418. Spurious mixer products are generated

419. Sufficient gain to allow weak signals to overcome noise generated in the first mixer

420. To prevent generation of spurious mixer products

421. To improve the receiver’s noise figure

422. A fixed-tuned passband amplifier

423. A cross-modulation distortion and interference

424. Selectivity

425. Gain

426. The RF stage

427. The level of noise generated in the front end and succeeding stages of a receiver

428. Blocking dynamic range

429. Cross-modulation of the desired signal and desensitization from strong adjacent signals

430. Dynamic range

431. Filter ringing

432. By using a pre-selector

433. Filter bandwidth should be slightly greater than the received signal bandwidth

434. Incorporate a high-Q filter

435. 600 microvolts

436. 38.57 dB

437. 29.33 dB

438. 2.954 MHz

439. Undesired signals will reach the audio stage

440. the noise floor of the receiver

441. Bandwidth characteristics

442. Bandwidth and noise figure

443. Restrict both gain and Q

444. The ratio between the minimum discernible signal and the largest tolerable signal without causing audible distortion products

445. In the receiver front end

446. Single-sideband, full carrier (H3E)

447. The padder capacitor

448. Blocking

449. Insufficient gain and selectivity

450. Is not rejected by the IF tuned circuits

Questions and Answers in Modulation Series

Following is the list of multiple choice questions in this brand new series:

Complete List of MCQ in Communications Engineering per topic

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