On Wednesday, 8 July 2020 15:30:04 UTC+1, Joe Gwinn  wrote:   
   > On Tue, 7 Jul 2020 19:35:15 -0700 (PDT), RichD   
   >  wrote:   
   >   
   > >Recall a few years back, a physics lab in Italy reported   
   > >faster than light neutrino observations.  After some ado,   
   > >they finally diagnosed a dodgy optical interconnect.   
   ...   
   > It was explained to me by an engineer from CERN a few years ago, but I   
   > cannot find the reference right now.  The delay (in the nanoseconds)   
   > was because an impedance bump due to the bad connection acted as an   
   > low pass filter, slowing the critical edge just enough.  As I recall,   
   > the offset was something like 60 ns.   
      
   The implication being that the fibre is carrying discrete pulses to provide a   
   time reference for the detected particles, rather than e.g. a network link.   
      
   Hence, changing the arrival time of the optical pulse alters the measured   
   speed of the detected neutrinos.   
      
   Is that correct?   
      
   Thanks   
      
   Henry   
      
   --- SoupGate-Win32 v1.05   
    * Origin: you cannot sedate... all the things you hate (1:229/2)