Below are the answers key for the Multiple Choice Questions in Modulation Part 17.
801. 25 kHz
802. 50 kHz
803. modulates the FM carrier
804. double-sideband modulates a subcarrier
805. a 67 kHz subcarrier
806. armstrong system
807. remains the same
808. FM/TV stereo
809. G3E
810. lock
811. any of these
812. bandpass filter
813. modulating signal
814. modulating signal
815. local oscillator
816. frequency-shift keying
817. television
818. a circuit for detecting FM signals
819. television video
820. to overcome noise
821. amplitude
822. TV video
823. narrowband FM
824. 75 kHz or 220 kHz
825. 15 kHz
826. 50 Hz
827. no discrimination against noise
828. error signal
829. AF signal
830. less AF distortion
831. narrow
832. varying AC
833. varying AC
834. varying DC
835. varying DC
836. foster-seeley discriminator
837. stagger-tuned detector
838. ratio
839. 4.5 MHz
840. 10.7 MHz
841. can use crystal oscillator
842. ratio detector
843. reduce noise reception
844. limiting IF and detectors
845. any of these
846. reduce flutter
847. discriminator, limiters, IF, mixer and RF
848. Crosby
849. reactance modulator looks like Xc
850. filter
851. voltage variable capacitor
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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