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  • HSD is not configured to do anything (Check the HSD config tab for no channels enabled)
  • if hsd timing frames are not being received at 926kHz (status here), click TxLink Reset in XPM window.  Typically when this is an issue the receiving rate is ~20kHz.
  • The HSD configuration partition number does not match platform number in .cnf file (Check the HSD "base" tab)
  • also check that HEADERCNTL0 is incrementing in "status" tab of HSD cfg window.
  • in hsd window timepausecnt is number of clocks we are dead
  • in hsd expert window "full threshold(events)" sets threshold for hsd deadtime
  • in hsd status window "fex free events" and "raw free events" are the current free events.
  • in hsd status window "write fifo count" is number of timing headers waiting for HSD data to associate.
  • "pgp tx frame countreadcntsum" on hsd status timing tab goes up when we send a transition OR L1Accepts
  • check kcuStatus for "locPause" non-zero (a low level pgp FIFO being full).  If this happens then:  configure hsd, clear readout, reboot drp node with KCU

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