Reports until 09:25, Tuesday 02 December 2025
H1 SUS (CDS, ISC, SUS)
jeffrey.kissel@LIGO.ORG - posted 09:25, Tuesday 02 December 2025 (88305)
h1susex DAC Upgrade: SUS ETMX / TMSX/ ETMXPI Simulink Model Prep for 28-bit 32CH DACs
J. Kissel
ECRs: E2400409 and E2500296
IIET: 35739 and 35706, respectively
WP: 12901
DWG: D1002741

This morning, I updated the front-end user models for the X end station -- h1susetmx, h1susetmxpi, and h1sustmsx -- leveraging all the work and gotchas from yesterday's 32CH DAC upgrade of the Y-end station front end models (Primary models LHO:88280, Inconsequentially Updating Libraries LHO:88283, and Adding DAC compensation filters to the ETM PI library part LHO:88285). The good thing about having the end-stations use identical wiring diagrams means that I can literally copy and paste the digital representations of the DAC connections and cards. I've confirmed that the library part change to the ETM PI library correctly updated in the h1susetmxpi model without effort. The only "difference" was that the top level of the ETMX QUAD model, h1susetmx, had all of the messy prototyping pick-off infrastructure for the early 32CH DAC testing which can now all be ripped out and made to look clean and simple like ETMY's. 

I attach before vs. after screenshots for posterity. 

The revisions of the models that have been successfully compiled:
    /opt/rtcds/userapps/release/sus/h1/models/
        h1susetmx.mdl         r28431 --> r34046        BEFORE vs AFTER
            sus/common/models/ESD_LINEARIZATION_WITH_CHARGE_MASTER.mdl : r16336 --> r30316
        h1susetmxpi.mdl       r27215 --> r34048        BEFORE vs AFTER
            sus/common/models/PI_MASTER_V2.mdl : r26600 --> r34033
        h1sustmsx.mdl         r27182 --> r34050        BEFORE vs AFTER

And as before, I also attach a screenshot of the usage of DAC0 and DAC1 across front-end models. Today I decided to be a little more color-coded with my notes on channel usage; red for consumed/reserved in other models, orange for actually physically unused.

Images attached to this report