Firmware 2.7 - new functions:
* fix for slow ROC adaption after changing from DAC max to min.
  the chip needs additional 40usec to recover and have to correct DAc value
* make the Loop Trigger Delay a configurable parameter, to be set via
  SetLoopTriggerDelay(unit16_t delay) in usec. This is the time to wait between
  each trigger sent to the DUT.