- if receiving with 62.5MHz, trunkate the LSB of the received timestamp
  to ensure constant reception frequency, before, if the tx timestamp
  was odd, the data was released by the streamers full 16ns later, this
  created a jitter on reception, whem measuring the period between
  received+delayed data

- the rx timestamps where taken into account without checking whether
  they are valid, they might not be valid if the synchronization is
  not good.