We continued to deploy the DAC1955 v3r3 firmware on the DAC1955 boards by completing the SPRB part and running it on the SIB2 and ALS subsystems.

• SPRB_rtpc : DAC1955 firmware completion: 1 DAC1955 board updated, the one use for SBE and Phase camera
  • Tolm output data flow reduced from 12.6MB/s to 2.56MB/s  
• SIB2_rtpc : the 4 DAC1955 boards are updated
  • Tolm output data flow reduced from 16.78MB/s to  3.43MB/s
• ALS: the 3 DAC1955 boards are updated 
  • ALS_NEB_rtpc: Tolm output data flow reduced from 4.2MB/s to  0.34MB/s
  • ALS_WEB_rtpc: Tolm output data flow reduced from 4.2MB/s to  0.31MB/s
  • ALS_CEB_rtpc : Tolm output data flow reduced from 4.2MB/s to  0.53MB/s

Operations performed between 2026-08-28-05h30m03-UTC and 2026-08-28-09h12m26-UTC

• all the loops were opened during the time of the operations and successfully closed at the end
• At the end the ITF was relocked at LOCKED_ARM_BEATING  after the re-aligment of the ALS_CEB phototiodes used to acquire the NARM and WARM beating beams

Below the detailled list of the DAC1955 boards updated and the related ACL's server

SPRB :

• SPRB_SBE and EPRB_PC : 1 DAC1955 board
  • SPRB_DAC_SBE0 : DAC1955_SN004 - DBOX_SN025 - SPRB_dbox_rack : shared DAC1955 board
    • SPRB_SBE server: ch00-ch05 : 6 channels
    • EPRB_PC server  : ch06-ch07 : 2 channels
• We checked  that the Tolm packects are correctly received by the DAC board
• The SPRB_SBE loops were successufly closed after the update 

SIB2:

• SIB2_LC  and SIB2_SBE : 3 DAC1955 boards
  • SIB2_DAC_LC_LVDT_in : DAC1955_SN005 - DBOX_SN001 - SIB2_dbox_bench  
  • SIB2_DAC_LC_LVDT_out : DAC1955_SN015 - DBOX_SN020 - SIB2_dbox_rack 
  • SIB2_DAC_SBE0 : DAC1955_SN009 - DBOX_SN047 - SIB2_dbox_rack
  • We checked  that the Tolm packects are correctly received by the DAC boards
  • The SIB2_LC and SIB2_SBE loops were successfully closed after the upgrade
• SIB2_Quadrants :  1 DAC1955 board
  • SIB2_DAC_galvo : DAC1955_SN137 : DBOX_SN101 - SIB2_dbox_bench
  • We checked  that the Tolm packects are correctly received by the DAC board

ALS

• ALS_NEB_BPC: 1 DAC1955 board
  • NEB_DAC_ALS0 :  DAC1955_SN062  : DBOX_SN066 - NEB_ALS_dbox
  • We checked  that the Tolm packects are correctly received by the DAC board
  • The IR PSTAB loop was successfully closed after the upgrade
• ALS_WEB_BPC: 1 DAC1955 board
  • WEB_DAC_ALS0 : DAC1955_SN002 : DBOX_SN050 - WEB_ALS_dbox
  • We checked  that the Tolm packects are correctly received by the DAC board
  • The IR PSTAB loop was successfully closed after the upgrade
• ALS_CEB_BPC and LNFS_RAMSs :  1 DAC1955 board
  • CEB_DAC_ALS : DAC1955_SN145 : DBOX_SN086 - CEB_ALS_dbox : shared DAC1955 board
    • ALS_CEB_BPC : ch00-ch03 : 4 channels 
    • LNFS_RAMs     : ch04-ch07 : 4 channels
  • We checked  that the Tolm packects are correctly received by the DAC board
  • The PZT NARM and WARM loops were successfully used to increase the NARM_DC and WARM_DC signals
    • Operations performed between 2026-08-28-09h10m43-UTC and 2026-08-28-09h12m26-UTC