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rel="stylesheet" href="/css/property.css"> <script> window.onload=function(){ changeTableHeight(); } window.onresize=function(){ changeTableHeight(); } function changeTableHeight(){ $(".proshowParameter table th").each(function?(i,o){ ????var $this=$(o),? ????height=$this.next().height(); ????$(this).css("height",height); var obj = $(o); var val = obj.text(); if(val == '' || val == null || val == undefined){ $(this).addClass('none'); }else{ $(this).removeClass('none'); } }); $(".proshowParameter table td").each(function?(i,o){ var obj = $(o); var val = obj.text(); if(val == '' || val == null || val == undefined){ $(this).addClass('none'); }else{ $(this).removeClass('none'); } }); } </script> <section class="proshowParameter"> <table style=" margin-bottom:20px;"> <tbody> </tbody> </table> </section><p>ZY5146 20W功率衰減器</p><p>ZY5146 20W功率衰減器</p><p></p><p> <strong>上海康登電氣科技有限公司</strong></p><table style="border-collapse:collapse; border-spacing:0px; border:1px solid rgb(168, 194, 159); font-family:nsimsun; font-size:12px; height:441px; line-height:normal; margin:0px; max-width:100%; padding:0px; width:737px; word-break:inherit"><tbody><tr><td colspan="2"><p><strong>是測試電力載波通信設(shè)備的儀表之一，在0～500KHz頻率范圍內(nèi)，可測量線路的增益和衰減，其特點是：小、巧、輕、穩(wěn)，特別適用于線路維護修理。</strong></p></td></tr><tr><td colspan="2"><strong> </strong></td></tr><tr><td><strong><img alt="(75Ω)" src="http://i01.yizimg.com/" style="height:auto; margin:0px auto 5px !important; width:12px" /></strong></td><td><strong>主要特點</strong></td></tr><tr><td colspan="2"><table border="1" style="border-collapse:collapse; border-spacing:0px; border:1px solid rgb(168, 194, 159); margin:0px; max-width:100%; padding:0px; width:721px; word-break:inherit"><tbody><tr><th scope="row"><strong>頻率范圍</strong></th><td><p><strong>0～620kHz</strong></p></td></tr><tr><th scope="row"><strong>頻率特征</strong></th><td><p><strong>≤± 0.3dB</strong></p></td></tr><tr><th scope="row"><strong>額定功率</strong></th><td><strong>20W</strong></td></tr><tr><th scope="row"><strong>固定衰減范圍（分五檔）</strong></th><td><strong>1 dB、2 dB、4 dB、8 dB、16 dB，zui大衰減量31dB</strong></td></tr><tr><th scope="row"><strong>衰減誤差</strong></th><td><strong>各檔均≤± 0.2dB</strong></td></tr><tr><th scope="row"><strong>起始衰減</strong></th><td><strong>在 0～620kHz頻率范圍內(nèi)≤±0.1dB</strong></td></tr><tr><th scope="row"><strong>阻抗特征</strong></th><td><strong>輸入輸出均為不平衡式 75Ω ρ≤±0.2%</strong></td></tr><tr><th scope="row"><strong>允許zui大輸入電平</strong></th><td><strong>+34 dB（38.7V 0.51A）</strong></td></tr><tr><th scope="row"><strong>正常使用條件</strong></th><td><p><strong>環(huán)境溫度： 0～+40℃，相對濕度：80%以上</strong></p></td></tr><tr><th scope="row"><strong>外形尺寸</strong></th><td><strong>180mm（長）×70mm（寬）×70mm（高）</strong></td></tr><tr><th scope="row"><strong>質(zhì)量</strong></th><td><strong>850g</strong></td></tr></tbody></table></td></tr></tbody></table> </div> <link rel="stylesheet" type="text/css" href="/css/MessageBoard_style.css"> <script language="javascript" 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