Trigger Jitter Correction
Event to event the timing of the trigger differs between the SURfs. It should be possible to remove this jitter using the clock signals. An example event showing all nine (one per SURF) raw clock signal is shown below.
Some points to note:
- The signal is not symmetric (it spends longer in the high state, than the low).
- There is some ringing near the phase transitions.
- The bulk of the difference in phase between SURFs is due to signal propagation to the LABRADOR chips on each SURF.
- Event by event variation in this phase difference is the trigger jitter.
Copyright © 2006 Ryan Nichol, (last modified 06 Jun 2007)