Jeff, Oli

Since the ETMY and TMSY electronics are now on 32CH, 28-bit DACs, we needed to add a calibration term that would account for the difference in bit count between the old and new DACs. The normal thing to do for these DAC upgrades is to add a gain in the COILOUTF filter banks that was gain(2^(NewBitCount-OGBitCount)). For example, during the conversion of ETMY L1/L2/L3 from their original 18-bit DACs to 20-bit DACs, the calibration was altered by the addition of a filter in their respective COILOUTF banks that was gain(4), since 2^(20-18) = 4.

This time, we needed the change in gain to be between the new bit count, 28, and the original bit count, 18, so gain(2^(28-18)) = gain(2^10)=gain(1024). These filters were added into the FM10 slot of ETMY_{M0,R0,L1,L2,L3}_COILOUTF and TMSY_M1_COILOUTF. In the case of ETMY L1/L2/L3, these gains overwrite the previous 20bitDAC filters since we don't need those anymore.

The other place where we needed to add these conversion filters was for ETMY PI, and even back in May 2025 Jeff had noticed that we had never added in any compensation for the 18-20-bit DAC upgrade (84522). To finally follow through on fixing that we added filter banks into the PI model (88285), which for ETMY PI are called H1:SUS-ETMY_PI_UPCONV_ESDOUTF_LF and H1:SUS-ETMY_PI_UPCONV_ESDOUTF_RT, and I added filters into FM10 for each that had that same gain(1024) in them. I also added these new filter banks to the PI medm screen (screenshot).

All these filters were loaded in, turned on, and accepted as on in safe sdf. We slowly turned everything back on, and it all looks to be working correctly.