ASIC settings for the pn FEEs has been reset to the default aida settings. This was done to combat the observed dropping of several channels in pn only FEE modules
following motors movement. This effect was also observed in 2022 in several pulser walkthroughs conducted pre and post detector movement. No dropped channels were
observed in nn FEEs.
ASIC seetings changed;
IBias LF feedback from 0xf to 0x8
diode link threshold from 0xbf to 0xca
We also set the slow comparatort for all FEE modules back to 0x64 (1 MeV)
Settings tested using only 2 pn FEE modules (aida05 and aida16). Movement left and right. Dropped channels observed in all pn FEEs except aida05 and aida16. All pn ASIC
settings then changed. Movement for 10 repeptitions. No dropped channels observed in pn FEEs.
New settings saved in 2024Feb08-15.59.09 |