请教FLUKE DSP-4100测试六类线问题...

<p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times new=" New? AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; new="New" ?Times mso-bidi-font-family: mso-hansi-font-family:>测试后其中</span></p>
<p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times new=" New? AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; new="New" ?Times mso-bidi-font-family: mso-hansi-font-family:>1、</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times new=" New? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; 宋体? mso-fareast-font-family: AR-SA; 12.0pt; mso-bidi-font-size:>NEXT </span><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times new=" New? AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; new="New" ?Times mso-bidi-font-family: mso-hansi-font-family:>余量 <font color="#ff0000">-1.9dB 失败</font></span></p>
<p><span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times new=" New? AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; new="New" ?Times mso-bidi-font-family: mso-hansi-font-family:>2、</span><span lang="EN-US" style="FONT-SIZE: 10.5pt; FONT-FAMILY: 'Times new=" New? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; 宋体? mso-fareast-font-family: AR-SA; 12.0pt; mso-bidi-font-size:>PS NEXT <span style="FONT-SIZE: 10.5pt; FONT-FAMILY: 宋体; mso-bidi-font-size: 12.0pt; mso-ascii-font-family: 'Times new=" New? AR-SA? mso-bidi-language: ZH-CN; mso-fareast-language: EN-US; mso-ansi-language: 1.0pt; mso-font-kerning: Roman?; new="New" ?Times mso-bidi-font-family: mso-hansi-font-family:>余量 <font color="#ff0000">-0.7dB 失败</font></span></span></p>
<p>请问这两项的余量是负值会有什么影响不？知道的XDJM帮帮忙，小弟感谢了！</p>

没关系的，

&nbsp;首先，这两个值失败，这条链路的质量，是不合格的，影响你的质量验收。<br/>另外，这两个值是近端串扰和综合近端串扰，会影响网络的数据收发，造成信号识别困难，加大误码率，网络性能受到影响。<br/>更多的知道，请到www.rdkm.cn找相关的技术文章学习一下吧。<br/>另外，如果出现这种故障，用FLUKE的仪表，可以再按一下故障定位键，找出故障点的位置，可以判断是线缆质量问题、或是模块、配加架问题、或是施工技术问题，进一步来维修，尽量修复。<br/>

[此贴子已经被作者于2010-2-25 19:11:46编辑过]

<p>测试时主机是不是在机柜端，如果是则有可能是线缆绑扎过紧造成的。</p>