Dear ALL,
TUSB211 is used for 3m cable. But eye diagram test fail.
When using only cable, eye diargam test was passed.
USB211 is middle point(1.5m) between host and device.
Would you suggeset how to improve eys diagram for using TUSB211?
this eye daiagram is only cable,
this eye diagram is for TUSB211.
<html><body><p align="center"><font size="6" face="Tahoma">Signal Quality Test Results in Tek format</font></p><p><font face="Tahoma"><strong>Device ID: </strong> hs_001 </font></p><p><font face="Tahoma"><strong>Device Description: </strong> High Speed, Near End Device, Up Stream Testing, Tier 1, Dummy Device.</font></p><p><font face="Tahoma"><strong>Date:</strong> Mon Dec 26 17:07:30 KST 2016 </font></p><p><font face="Tahoma"><strong>Overall Result:</strong> <strong><font color="#B53717">Fail </font><font color="#000000"></font></strong></font><big color=#FF0000>*</big></p><p align="center"><font face="Tahoma"><img src="up-near-1.5m-1.8k-pulse.jpg" width="640" height="480" ></font></p><p align="center"><font face="Tahoma">Waveform Plot</font><p align="center"><font face="Tahoma"><img src="up-near-1.5m-1.8k-eye.jpg" width="640" height="480" ></font></p><p align="center"><font face="Tahoma">Eye Diagram</font></p><br><p align="left"><font size="4"> Results based on USB-IF / Waiver Limits :</font></blockquote></p><table border="1" ><tr><td align="center"><p align="center"><font face="Tahoma"><strong>Measurement Name</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>Minimum</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>Maximum</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>Mean</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>pk-pk</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>Standard Deviation</strong></font></td><td align="center"><font face="Tahoma"><strong>RMS</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>Population</strong></font></td><td align="center"><p align="center"><font face="Tahoma"><strong>Status</strong></font></td></tr><tr><td ><p align="center"><font face="Tahoma">Eye Diagram Test</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma"><font color="#B53717">Fail</font></td></tr><tr><td ><p align="center"><font face="Tahoma">Signal Rate</font></td><td ><p align="center"><font face="Tahoma">452.1043Mbps</font></td><td ><p align="center"><font face="Tahoma">536.8298Mbps</font></td><td ><p align="center"><font face="Tahoma">479.8003Mbps</font></td><td ><p align="center"><font face="Tahoma"> 0.0000bps</font></td><td ><p align="center"><font face="Tahoma">12.22620Mbps</font></td><td ><p align="center"><font face="Tahoma">482.3947Mbps</font></td><td ><p align="center"><font face="Tahoma">512</font></td><td ><p align="center"><font face="Tahoma"><font color="#368132">Pass</font></td></tr><tr><td ><p align="center"><font face="Tahoma">EOP Width</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">16.77250ns</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">1</font></td><td ><p align="center"><font face="Tahoma"><font color="#368132">Pass</font></td></tr><tr><td ><p align="center"><font face="Tahoma">EOP Width (Bits)</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">8.047451 </font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">-</font></td><td ><p align="center"><font face="Tahoma">1</font></td><td ><p align="center"><font face="Tahoma"><font color="#368132">Pass</font></td></tr><tr><td ><p align="center"><font face="Tahoma">Rise Time</font></td><td ><p align="center"><font face="Tahoma">1.234677ns</font></td><td ><p align="center"><font face="Tahoma">1.469426ns</font></td><td ><p align="center"><font face="Tahoma">1.328592ns</font></td><td ><p align="center"><font face="Tahoma">234.7487ps</font></td><td ><p align="center"><font face="Tahoma">81.29178ps</font></td><td ><p align="center"><font face="Tahoma">1.330886ns</font></td><td ><p align="center"><font face="Tahoma">13</font></td><td ><p align="center"><font face="Tahoma"><font color="#368132">Pass</font></td></tr><tr><td ><p align="center"><font face="Tahoma">Fall Time</font></td><td ><p align="center"><font face="Tahoma">1.158833ns</font></td><td ><p align="center"><font face="Tahoma">1.376754ns</font></td><td ><p align="center"><font face="Tahoma">1.244881ns</font></td><td ><p align="center"><font face="Tahoma">217.9211ps</font></td><td ><p align="center"><font face="Tahoma">70.77934ps</font></td><td ><p align="center"><font face="Tahoma">1.246737ns</font></td><td ><p align="center"><font face="Tahoma">13</font></td><td ><p align="center"><font face="Tahoma"><font color="#368132">Pass</font></td></tr></table><br><br><font face="Dialog" size="4"> Additional Information : </font><br>  Consecutive Jitter range : -1.069us to 239.9ps RMS Jitter 489.5ns<br>  KJ Paired Jitter range : 4.168ns to 29.18ns RMS Jitter 12.51ns<br>  JK Paired Jitter range : 4.168ns to 29.18ns RMS Jitter 12.46ns<br><br><big color=#FF0000>*</big><font face="Dialog" size="4">The Overall Result for this test is <strong><font color="#B53717">Fail</font></strong>, because one or more individual status of the measurements is <strong><font color="#B53717">Fail</font></strong>. For this test, the recommended configuration for USB2 testing (as per USB-IF) is on Tier 1. </font><br><br><center><img src="tek_logo_new.gif" " WIDTH="147" HEIGHT="49"></center><br> <I><font color="#FF0000" face="helvetica" size=2>TDSUSB2 software version: 3.0.4 Build 5</Font></I></body></html>
