"振幅変調" meaning in Japanese

{
  "forms": [
    {
      "form": "振幅変調",
      "ruby": [
        [
          "振",
          "しん"
        ],
        [
          "幅",
          "ぷく"
        ],
        [
          "変",
          "へん"
        ],
        [
          "調",
          "ちょう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "shinpukuhenchō",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "sinpukufenteu",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "しんぷくへんてう",
      "roman": "sinpukufenteu",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "しんぷくへんちょう",
        "hhira": "しんぷくへんてう"
      },
      "expansion": "振(しん)幅(ぷく)変(へん)調(ちょう) • (shinpukuhenchō) ^(←しんぷくへんてう (sinpukufenteu)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        {
          "kind": "other",
          "name": "Japanese entries with incorrect language header",
          "parents": [
            "Entries with incorrect language header",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant alt parameters",
          "parents": [
            "Links with redundant alt parameters",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese links with redundant wikilinks",
          "parents": [
            "Links with redundant wikilinks",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with 4 kanji",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Japanese terms with redundant sortkeys",
          "parents": [
            "Terms with redundant sortkeys",
            "Entry maintenance"
          ],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with 1 entry",
          "parents": [],
          "source": "w"
        },
        {
          "kind": "other",
          "name": "Pages with entries",
          "parents": [],
          "source": "w"
        }
      ],
      "glosses": [
        "amplitude modulation (method of sending information)"
      ],
      "id": "en-振幅変調-ja-noun-3vUxCnH3",
      "links": [
        [
          "amplitude modulation",
          "amplitude modulation"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "しんぷくへんちょー"
    },
    {
      "ipa": "[ɕĩmpɯ̟kɯ̟hẽ̞ɲ̟t͡ɕo̞ː]"
    }
  ],
  "word": "振幅変調"
}

{
  "forms": [
    {
      "form": "振幅変調",
      "ruby": [
        [
          "振",
          "しん"
        ],
        [
          "幅",
          "ぷく"
        ],
        [
          "変",
          "へん"
        ],
        [
          "調",
          "ちょう"
        ]
      ],
      "tags": [
        "canonical"
      ]
    },
    {
      "form": "shinpukuhenchō",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "sinpukufenteu",
      "tags": [
        "romanization"
      ]
    },
    {
      "form": "しんぷくへんてう",
      "roman": "sinpukufenteu",
      "tags": [
        "hiragana",
        "historical"
      ]
    }
  ],
  "head_templates": [
    {
      "args": {
        "1": "しんぷくへんちょう",
        "hhira": "しんぷくへんてう"
      },
      "expansion": "振(しん)幅(ぷく)変(へん)調(ちょう) • (shinpukuhenchō) ^(←しんぷくへんてう (sinpukufenteu)?)",
      "name": "ja-noun"
    }
  ],
  "lang": "Japanese",
  "lang_code": "ja",
  "pos": "noun",
  "senses": [
    {
      "categories": [
        "Japanese entries with incorrect language header",
        "Japanese lemmas",
        "Japanese links with redundant alt parameters",
        "Japanese links with redundant wikilinks",
        "Japanese nouns",
        "Japanese terms spelled with fourth grade kanji",
        "Japanese terms spelled with secondary school kanji",
        "Japanese terms spelled with third grade kanji",
        "Japanese terms with 4 kanji",
        "Japanese terms with IPA pronunciation",
        "Japanese terms with redundant sortkeys",
        "Pages with 1 entry",
        "Pages with entries"
      ],
      "glosses": [
        "amplitude modulation (method of sending information)"
      ],
      "links": [
        [
          "amplitude modulation",
          "amplitude modulation"
        ]
      ]
    }
  ],
  "sounds": [
    {
      "other": "しんぷくへんちょー"
    },
    {
      "ipa": "[ɕĩmpɯ̟kɯ̟hẽ̞ɲ̟t͡ɕo̞ː]"
    }
  ],
  "word": "振幅変調"
}

{
  "called_from": "parser/304",
  "msg": "HTML tag <span> not properly closed",
  "path": [
    "振幅変調"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "振幅変調",
  "trace": "started on line 2, detected on line 2"
}

{
  "called_from": "parser/1336",
  "msg": "no corresponding start tag found for </span>",
  "path": [
    "振幅変調"
  ],
  "section": "Japanese",
  "subsection": "noun",
  "title": "振幅変調",
  "trace": ""
}