{"id":29651,"date":"2024-09-18T19:25:22","date_gmt":"2024-09-18T13:55:22","guid":{"rendered":"https:\/\/www.nextias.com\/ca\/?p=29651"},"modified":"2024-09-18T19:25:23","modified_gmt":"2024-09-18T13:55:23","slug":"signal-modulation","status":"publish","type":"post","link":"https:\/\/www.nextias.com\/ca\/current-affairs\/18-09-2024\/signal-modulation","title":{"rendered":"Signal Modulation"},"content":{"rendered":"\n

Syllabus :GS 3\/Science and Tech<\/strong><\/p>\n\n\n\n

In News<\/strong><\/h2>\n\n\n\n
    \n
  • Signal modulation streamlines the technology needed to transmit information, such as news on TV or music on the radio.\u00a0<\/li>\n<\/ul>\n\n\n\n

    Modulation\u00a0<\/strong><\/h2>\n\n\n\n
      \n
    • Modulation, in electronics, technique for impressing information (voice, music, pictures, or data) on a radio-frequency carrier wave by varying one or more characteristics of the wave in accordance with the information signal.\u00a0<\/li>\n\n\n\n
    • There are various forms of modulation, each designed to alter a particular characteristic of the carrier wave.\u00a0<\/li>\n\n\n\n
    • Modulation allows multiple signals to coexist without interference.\n
        \n
      • Digital transmissions are less affected by static noise, enhancing communication technologies.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

        Modulation Types:<\/strong><\/h2>\n\n\n\n
          \n
        • Frequency Modulation (FM):<\/strong> It involves changing the frequency of the waves to convey information (e.g., Morse code with closely spaced waves for dots).\n
            \n
          • FM is widely used in FM radio broadcasting, where the quality of sound is crucial. It provides better resistance to noise and interference compared to AM.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
          • Amplitude modulation (AM) <\/strong>: It involves varying the amplitude of the waves while keeping frequency constant (e.g., using heavy and light stones to represent dots and dashes).<\/li>\n\n\n\n
          • Phase Modulation (PM)<\/strong>: It changes the phase of waves to encode messages, allowing for clearer digital transmission since it’s less affected by amplitude fluctuations\n
              \n
            • PM is used in certain digital communication systems and radar applications.<\/li>\n<\/ul>\n<\/li>\n<\/ul>\n\n\n\n

              Uses of Modulation:<\/strong><\/h2>\n\n\n\n
                \n
              • Radio Broadcasting: <\/strong>Both AM and FM modulation are used for radio transmission. AM covers long distances but is susceptible to interference. FM provides better sound quality and is ideal for music.<\/li>\n\n\n\n
              • Television Broadcasting: <\/strong>TV signals are also modulated (usually using vestigial sideband modulation).\n
                  \n
                • This allows us to watch our favorite shows with clear audio and video.<\/li>\n<\/ul>\n<\/li>\n\n\n\n
                • Cellular Communication: <\/strong>Mobile phones use various modulation techniques to transmit voice and data over cellular networks.<\/li>\n\n\n\n
                • Wireless Internet (Wi-Fi): <\/strong>Wi-Fi signals are modulated to carry data wirelessly between devices.<\/li>\n\n\n\n
                • Satellite Communication: <\/strong>Satellites use modulation to relay signals across vast distances.<\/li>\n<\/ul>\n\n\n\n
                  Do you know ?<\/strong>
                  – Digital transmission uses discrete signals (0s and 1s), while analog transmission uses continuous signals.
                  – PM is digital and better for data transmission, whereas AM and FM are used for analog radio and TV broadcasts.<\/td><\/tr><\/tbody><\/table><\/figure>\n\n\n\n

                  Source :TH<\/p>\n","protected":false},"excerpt":{"rendered":"

                  Signal modulation streamlines the technology needed to transmit information, such as news on TV or music on the radio.\u00a0<\/p>\n","protected":false},"author":4,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[21],"tags":[],"class_list":["post-29651","post","type-post","status-publish","format-standard","hentry","category-current-affairs"],"acf":[],"jetpack_featured_media_url":"","_links":{"self":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/29651","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/users\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/comments?post=29651"}],"version-history":[{"count":1,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/29651\/revisions"}],"predecessor-version":[{"id":29652,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/posts\/29651\/revisions\/29652"}],"wp:attachment":[{"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/media?parent=29651"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/categories?post=29651"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.nextias.com\/ca\/wp-json\/wp\/v2\/tags?post=29651"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}