ELOG EDI_PSA

AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40

EDI_PSA

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Entry time:	Thu Nov 27 10:06:06 2025
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> According to Carl U. the DPP-PSA software is not meant to be used with negative pulses, and some of the > functions that are currently not working may be recovered fixing this issue. > > Changed Pulse Polarity in V1730PSD control panel Positive -> Negative > No changes. Note trigger is currently supplied by external CFD > QLong histograms are still not counting > > Set DC offset to 64000. The negative part of the pulse is cut off. Wave histogram shows nothing below zero. > Inversion doe snot appear to be working. > > > Changed BNC-4 Pulser polarity Negative -> Positive and changed polarity of time signal going to CFD. CFD > triggers OK. > No changes. QLong histograms not counting. > > Enabled self-triggering on Ch0 and removed CFD input. DAQ no longer triggers. Put CFD back in. > > Changed DC offset of Ch0 to 64010 to remove DC offset. Pulse now looks as attach 1. > Disconnected CFD output -> DAQ does not trigger. Reconnected CFD. > QLong histograms still not counting. > > Attempted to change options in V1730PSD control panel one by one to see difference > Enabled Charge Pedestal -> No difference. Disabled > Changed Charge Sensitivity 5 fC -> 5.12 pC. No difference. Back to 5 fC > Changed Discrimination Mode CFD -> LED & removed CFD input. No triggers. Reverted > > Changed Baseline Mean 16 -> 1024. Wave changes as per attach 1. QLong histogram starts counting at low channel. > See attach 2. > Changed DC offset 64010 -> 60000. Peak in QLong histogram moves to ~1050 channels. See attach 2. > Changed DC offset back to 64010. > Changed Baseline Mean 1024 -> 64. No changes in either wave shape or QLong peak position. > Changed Baseline Mean 64 -> 256. No changes as above. > Changed Baseline Mean 256->16. Wave is back as per attach 1, QLong no longer counting. Encoding: HTML ELCode plain Suppress Email notification

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ELOG V3.1.3-7933898