oscillations occurring in the middle of waveform

Hello All,While simulating SI in HyperLynx I observed following waveform in oscilloscope:[cid:image001.png@01CF5E4C.CF56A040]I am not able to understand that why there are oscillations occurring in the middle of waveform(circled in white colour).I have even observed this waveform practically on my board.Can someone pls. explain me about the same.Best Regards / Mit freundlichen Grüßen,Nachiket WawooThis transmission is intended solely for the addressee and contains confidential information.If you are not the intended recipient, please immediately inform the sender and delete the message and any attachments from your system. Furthermore, please do not copy the message or disclose the contents to anyone unless agreed otherwise. To the extent permitted by law we shall in no way be liable for any damages, whatever their nature, arising out of transmission failures, viruses, external influence, delays and the like.
Nachiket.Wawoo 6 years 9 months 5 days

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Answered byNachiket.Wawoo 6 years 9 months 2 days
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Answered byNachiket.Wawoo 6 years 9 months 2 days
ée     eü?¦Á¨­?x¢¼¨ººÞ²?'±ë(?lª¹êòü¬µ j·lüÈ­~·®Ùbr§¿ÿÿ÷§üÖ??)µf°¢k¢oÖk(üÖ??)µ'§·õ?vw¬u¬ÿ?â?mÿÛMx÷ý:k?]¶ÿm5ã¯öìó£õ?Â?ÿ5§!?G­JæãyËÿEïÿHË!$ÿ¢Ç"?V­??ì¡Ç.®¸§?)í?é¢uÙ^¡ü½çè®cZr¤zßÓ?è¦j?ÙèµÊ&zØk¢è!?|¨ººh²ßȲØ^¢Ç"?V­??Ú¦élzÈZ¥ê+iÖ¦¥çl?w°j÷ÿN§?ÏÓ¡¼?jºâz¿Â 3§Nçÿ?öÛý´×?­ïý÷(üÖ??)·óZr¤zßÖk(þI访ۭé¬{÷(?ù??[hüÖ??)·õ?Â?ÿ?z+¯öëzkýÊ&ÿü+¢×ÿée    eýhb?ë"?éZ¶)àH?§*^¬¼§Ä?±êïy×è?Z0?x0j÷?¢¹¢???Yh±Ê){ÿÜ?ßâ?¨ÓMÿ¦xÿÓP?äNü!yè8Óò?z-i¹^¶?§uê쵩ݶ­Â­?êÞj·¨±È¥?«b¢{(qË«®)à?{azhvW¨¯yú+?÷"­É^v)ð?+^r?hº¿ÿ"¯yëÞ??ìz»ÞvØb³¯yú+??ÚrØ?jYr¢y²n?«wð??Ê&z?Þ¦[ÿ{ej)æy¦èºÛazƦ{ð^²Ô^ªÝ³ó"µúÞºwe?È^?jÿÿÿÞ?óZr¤zÕ?Â??+-­©ì?+,??â²)ízw^vÊ%z\?¢»ay§]­ë,yæ§uÊ'µ¨§±Ê'~'^?Ø??)ߢ¹?¶*'ü?ò¢æ«zz-¶¢?קuçkyÈ©?éíþ?^jÇ¢?g?«^?(§~?涬zw^­©Ýué^µëazg¬±¨jwZ?&­µ§!?éí±úè?*.®Ì¬µéÿêí?ê梷ÿ¦W?±çh??\¢?­?é?²Æ z?Ý?Ç%¢Ç­?ç(?ק¶Ëhj|¨ë§?ë,jÞyÚ-?êð?ÇÿN?ayìmz{iz¹¢¶×o)Zì?©e?yèÁ¬?zX?nW?¢¶§ÉÖ¦j¬ÿZµëÞ®Ø^?¹Ú¶êÞýªâ²)à¢ëh~ÚÚ?É¢²È¨ö¢?êÞ³ûâ®ë³÷±µêçjX§~[?ÇÿuéZÊƧvØ^?)ÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÓ¢éì¹»®&Þ~º&²/å?Ëÿ²/å?Ëÿ­ê®zËÿ~·??+-³ú+?ù??[hþÈÿ?+-þ·ª¹ë-ýúÞzX¬¶Ïè®ð?Øÿº{.nÇ+?·ÿ?{ay+?ç-~'¥v?í¡§f?x¬µêò¢êæzfÞ®Èb¥úè?¬n?{ø(¶á¶Úÿÿü0Ã÷ëyéb²Ûÿ¢¸?Áæéj¿²/å?ËE¢¸^??ì?ùb²ßëz«?²ßß­ç¥?Ëlþ?àþf¢?Úÿ²/å?Ëÿ­ê®zËÿ~·??+-³ú+?ü"¶ázZÿ?{ay+?ç-~'¥t¸¬µú+ºh¬iDzÈ??æ­þm§ÿÿµç!þèº?ÿɨh£÷(?ø+¢ê²/å?ËK?ËZ­Èb½ë­ëâ{??æ­þm§ÿÿÃÿ~·??+-³ú+?ö«r¯zÏì?ùb²Ó¥wúk??í ?§{¯öÓMÿ?+-j·!?÷¬j·¯?ìnW?·øm¶?ÿÿ0þ«%þw­ÿú¶?ÿý:É8b²ÚÚ?É¢²È¨?+"?קuçl¢W¥Éú+¶?uÚÞ²Ç?jw\¢{Z?{¢wâuéí?©bú+?«b¢È*.j·§¢Ûaz)ízw^v·?????ßé?æ¬z)¦yØ?µér?wè®kazǧuêڝ×^?ë^¶¦zˁæ§u©òjÛZr??Û®?²¢êìÊË^?ñn®Ø^®j+{úey«v?èµÊ)ÊØ^?ë,j¨­Ø¬rZ,zØ^r?íz{l¶?§Ê?Þºy^²Æ ­ç¢Ø^¯¬{ôè¶?Æק¶?«?+myÖò?¬0zÈZ?X§??É·¥?¦åyú+j|jf zÏð?«^½êí?諝«n­ïÚ®+"?.¶?í­©ì?+,??ßj)n­ëÿ¾*î±ëÿ{^®v¥?wå¹éÜ{÷^?¬¬jwm?éb
Answered byNachiket.Wawoo 6 years 9 months 4 days
ée     eý*+¯'è®Ø^m§b?¨?)äüùlýø§u«miÈ^v)?çè®Ø^­çÞ­éÜ{ð^²Ô^ªÝ³ó"µúÞºwe?È^?jÿÿÿÞ?óZr¤zÕ?Â?®?ÿN?òªë?êÿ?¨¥¶Üjºâz¿í¡¼ÿ?f¢?÷(?ô??ßÓ¹ëk/À¦¸¥ÛoöÓ^:ÿnÏ1:ÿY¬(£óZr¤zÔ®n7?·ô^ÿô?ü²Oú,r)ejب?Êrêë?x"?Ø^?']?êÁ«Þ~?æ5§!?G­ý8^?f y؝??\¢g­?º.?§Ê?«¦?-ü?-?ê,r)ejبªn?Ǭ?ª^¢¶jj^vȧ{¯{ôájy,ý:È&«®'«ü":tî{ð)¯m??ÛMxjÞÿßpýf°¢ÍiÈb?ëÿ5§!?G­ýf°¢ä??ëýºÞ?Çÿr?ÿ?¨¥¶ÍiÈb?ëÿY¬(£ù'¢ºÿn·¦±ïÜ¢oÿº-{ñÞ?Z.¶?í­©ì?+,??ßj)n­ëÿ¾*î±ëÿ{^®v¥?wå¹éÜ{÷^?¬¬jwméb?ïÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿÿý:.?Ë?±Êâmçë¢k"þX¬·û"þX¬·úު笷÷ëyéb²Ûÿ¢¸ÿ?¨¥¶ì?ùb²ßëz«?²ßß­ç¥?Ëlþ?àÿ­?û§²æìr¸?{ø§¶?¹¸Þr×âzWh®Úvh§?Ë^¯*.®g¦mêì?*_®??Áæéjÿ??hþm§ÿÿÃÿ~·??+-³ú+?ün? {û"þX¬´Z+?éiþÈÿ?+-þ·ª¹ë-ýúÞzX¬¶Ïè®æj)m£û"þX¬·úު笷÷ëyéb²Ûÿ¢¸ÿÂ+aþ¥§ø§¶?¹¸Þr×âzWK?Ë_¢»¦?Æ?që,?¹^jßá¶Úÿÿû^rà®?©³ü???ÿr?¿?º.§û"þX¬´¸¬µªÜ?+Þ±ªÞ¾'°i¹^jßá¶Úÿÿü0Ã÷ëyéb²Ûÿ¢¸?j·!?÷¬þÈÿ?+-:Wÿ¦¸¨®Úºwºÿm4×ùb²Ö«r¯zÆ«zø?Á¦åy«ÿ?ÛiÿÿðÃê²_çzßðo«i»ÿÓ¡¼??+-­©ì?+,??â²)ízw^vÊ%z\?¢»ay§]­ë,yæ§uÊ'µ¨§±Ê'~'^?Ø??)ߢ¹?¶*'ü?ò¢æ«zz-¶¢?קuçkyÈ©?éíþ?^jÇ¢?g?«^?(§~?涬zw^­©Ýué^µëazg¬±¨jwZ?&­µ§!?éí±úè?*.®Ì¬µéÿêí?ê梷ÿ¦W?±çh??\¢?­?é?²Æ z?Ý?Ç%¢Ç­?ç(?ק¶Ëhj|¨ë§?ë,jÞyÚ-?êð?ÇÿN?ayìmz{iz¹¢¶×o)Zì?©e?yèÁ¬?zX?nW?¢¶§ÉÖ¦j¬ÿZµëÞ®Ø^?¹Ú¶êÞýªâ²)à¢ëh~ÚÚ?É¢²È¨ö¢?êÞ³ûâ®ë³÷±µêçjX§~[?ÇÿuéZÊƧvØ^?)
Answered bybalaseven 6 years 9 months 5 days
Measure at die instead of pin..RegardsbalaOn 22 Apr 2014 17:06, "Wawoo, Nachiket" wrote:> Hello All,> While simulating SI in HyperLynx I observed following waveform in> oscilloscope:>> [cid:image001.png@01CF5E4C.CF56A040]>> I am not able to understand that why there are oscillations occurring in> the middle of waveform(circled in white colour).>> I have even observed this waveform practically on my board.>> Can someone pls. explain me about the same.>> Best Regards / Mit freundlichen Grü�en,> Nachiket Wawoo>>> This transmission is intended solely for the addressee and contains> confidential information.> If you are not the intended recipient, please immediately inform the> sender and delete the message and any attachments from your system.> Furthermore, please do not copy the message or disclose the contents to> anyone unless agreed otherwise. To the extent permitted by law we shall in> no way be liable for any damages, whatever their nature, arising out of> transmission failures, viruses, external influence, delays and the like.>>> 
Answered byolaney 6 years 9 months 5 days
Possibly a reflection shifted by round trip delay?  I couldn't get the linkto work.Orin-----