MCQ in Modulation Part 14 – Answers

Below are the answers key for the Multiple Choice Questions in Modulation Part 14.

651. E.H. Armstrong

652. angle modulation

653. the amplitude of any sideband depends on the modulation index

654. 45 kHz

655. frequency modulation

656. amplitude

657. angle modulation

658. angle

659. phase modulation

660. lies in the different definitions of the modulation index

661. phase deviation

662. decreases

663. both peak positive and negative amplitudes

664. frequency deviation

665. frequency deviation

666. amplifying the higher audio frequencies

667. instantaneous phase deviation

668. 3.05 kHz

669. intelligence frequency

670. instantaneous phase

671. amplitude

672. discriminator

673. zero-crossing points

674. is decreased

675. instantaneous frequency deviation

676. is decreased

677. instantaneous frequency

678. deviation sensitivity

679. frequency modulation

680. carrier amplitude and frequency

681. low-pass filter

682. lower bandwidth is required

683. zero crossings

684. both positive and negative peak value

685. Armstrong

686. modulation index

687. indirect FM

688. mixer input must be tuned to the signal frequency

689. the carrier frequency

690. variable sensitivity

691. carrier swing

692. 12.5

693. percent modulation

694. 19.8:1

695. phase modulators

696. the linearity is worse than in a phase discriminator

697. 5

698. rest frequency

699. frequency modulator

700. cuts off an audio amplifier when the carrier is absent

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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