Page History

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• 288 bits of "event codes":
  • some have well-defined meanings (in progress)
  • 16 highest bits are hutch specific for sequences
  • DAQ readout groups are "extra bits" included at end of timing frame
• timing frames have destinations: e.g. bykiks, and bykikh both go to "bsy" dump
• we will not be using event-codes for bykiks: use destinations instead
• timing arrives 100us prior to beam
• accelerator max rate is 13/14MHz=929kHz
• 910kHz vs. 928kHz, 71428 is The 71428Hz rate is special: common between LCLS1 and LCLS2
• 928kHz is max rate, but accelerator pattern repeats every 910k bucketscan trigger on power-line synchronized markers (1,5,10,3,60Hz...)
• timing trigger types:
  • sequences
  • ac-line rate (1,5,10,30Hz...)
  • fixed-rate patterns (1, 10, 100, 1000, 10000, 71kHz, 929kHz)
• need to coordinate hutch sequence-pattern scripts with accelerator sequence-pattern