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<p><br></p><!--StartFragment--><p class="0" style="text-align: center; -ms-word-break: keep-all; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">라디오 주파수 변조방식인 AM</span><span style="font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체;">과 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">FM</span><span style="font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체;">의 정의</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">(</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">定義</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 24pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">)</span></p><p class="0" style="mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><br></p><p class="0" style="mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> </p><p class="0" style="mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM(Amplitude Modulation)</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이란</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">?</span></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이란 진폭변조</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">(amplitude modulation)</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">를 말합니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이때 변조란 전자공학에서 말하는 개념인데</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">, </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">라디오 전자파 가운데에서 하나 또는 몇 가지의 특성을 변화시켜 소리나 음악 그림 자료 등의 정보를 뽑아내는 작업을 말합니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">라디오 전파로부터 원하는 요소를 뽑아내 사람이 이용할 수 있도록 도움을 주는 작업을 말하는 것이다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">과 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 변조의 대표적인 것들입니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 전파에서 진폭을 변화시키는 작업입니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">파동은 물결과 비유됩니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">아래위로 출렁이는 물결의 가장 낮은 곳과 높은 곳 사이의 간격이 진폭인데</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">, </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이 값을 변화시키는 것이다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">.AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 라디오 방송의 고전적인 방법입니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 장거리단파방송이나 텔레비전방송의 화면</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">(</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">영상</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">)</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">부분에 채택되고 있습니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">.</span></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">FM(Frequency Modulation)</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이란</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">?</span></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"> <!--[if !supportEmptyParas]--> <!--[endif]--> </p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 주파수변조</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">(frequency modulation)</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">라고 합니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">과 달리 진폭은 변화 없이 필요에 따라 주파수만을 변화시킵니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이러한 유형의 변조 방식은 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">1930</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">년대 미국의 암스트롱</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">(Edwin H. Armstrong)</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">에 의해 개발됐습니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">이 갖는 교란을 극복하기 위해 개발됐던 것입니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">보다 교란에 덜 민감합니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">따라서 천둥 번개나 그 밖의 기계 등에 의해 생기는 교란의 침투가 적어서 소리가 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">보다 상대적으로 깨끗한 것입니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">소음을 내는 신호는 전파의 진폭에 큰 영향을 주지만 주파수에는 영향을 주지 못하기 때문입니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">.FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 스테레오 사운드</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">, </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">텔레비전의 소리부분</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">, </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">장거리전화 등에 채택됩니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">. </span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">또한 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">FM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">은 </span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">AM</span><span style="font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체;">보다 더 높은 주파수를 쓰고 있습니다</span><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;">.</span></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;"><br></span></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;"><br></span></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;"><br></span></p><p class="0" style="text-align: center; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><img src="https://t1.daumcdn.net/cfile/cafe/2744E846578F2A6922" class="txc-image" width="820" style="clear: none; float: none;" border="0" vspace="1" hspace="1" data-filename="39.jpg" exif="{}" actualwidth="820" id="A_2744E846578F2A69221AE8"/></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;"><br></span></p><p class="0" style="text-align: center; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><img src="https://t1.daumcdn.net/cfile/cafe/2260C646578F2A6905" class="txc-image" width="700" style="clear: none; float: none;" border="0" vspace="1" hspace="1" data-filename="36.jpg" exif="{}" actualwidth="700" id="A_2260C646578F2A6905D4BE"/></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;"><br></span></p><p class="0" style="text-align: center; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><img src="https://t1.daumcdn.net/cfile/cafe/23434D46578F2A6A23" class="txc-image" width="700" style="clear: none; float: none;" border="0" vspace="1" hspace="1" data-filename="37.jpg" exif="{}" actualwidth="700" id="A_23434D46578F2A6A231F50"/></p><p class="0" style="text-align: justify; mso-pagination: none; mso-padding-alt: 0pt 0pt 0pt 0pt;"><span style="letter-spacing: 0pt; font-family: 굴림체; font-size: 14pt; mso-fareast-font-family: 굴림체; mso-ascii-font-family: 굴림체; mso-font-width: 100%; mso-text-raise: 0pt;"><br></span></p><p style="text-align: justify;"><br></p>
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카페 게시글
오디오와 컴퓨터
라디오 주파수 변조방식인 AM과 FM의 정의(定義)
관운
추천 0
조회 902
16.07.20 16:38
댓글 1
북마크 번역하기 공유하기 기능 더보기
다음검색
첫댓글 군대에서 FM은 야전교범 즉 Field Manual 을 의미합니다. 메뉴얼 대로 정확하게 하라는 뜻입니다. 저는 군에 가보지 않아서 잘 모르겠는데, 통신학교에서 교수가 FM을 자주 강조하던데 그때는 First Method라고 통신에서는 Second란 단어는 잘 사용하지 않습니다. 주파수변조방식은 매우 많습니다. 여기서 동기라는 것이 나오는데 송신측과 수신측에서 주파수와 동기가 맞아야 교신할 수 있습니다. 전이중(전화, 인터넷), 반이중(무전기), 단방향 방식(TV, 라디오) 등이 있으면 전이중, 반이중은 통신의 범주이며 단방향 통신은 방송에 속합니다.