[SI-LIST] help ?why my eye is like this ??

Hello si gurus ,

   When i using Hspice simulating the Trans lines ,
   I always got a eye diagram like this and always there
   some line cross the eye

   The code is like this

 .param per='xxxxx' $desired eye diagram period
 .param tsi='xxxxx' $desired eye diagram start time
 .probe tran
 +eyetime1=
 +par('.5*(sgn(TIME-tsi)+abs(sgn(TIME-tsi)))*(TIME-tsi-per*int((TIME-tsi)/per
  ))')

    So how can i get a 'clear' eye ???


    appreciate for any help!!!


  

-- 
Best regards,
 qzheng                          mailto:qzheng@xxxxxxxxxxxxxxxx

-- Binary/unsupported file stripped by Ecartis --
-- Type: image/jpeg
-- File: eye.jpg


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