Hi Hiro and others, Let me clarify one thing about the BB time cal: modules were written originally according to what Yury et al had implemented. The delta TDC was done first since it allowed an easier alignment of the tubes before the slewing effect was evaluated. In the slewing formula, there's an extra delta TDC (the time limit at infinitely high ADC). When I wrote these modules, I thought about it and didn't like it but I chose to be conservative and Flemming supported that. Then someone introduced an option in the deltaTDC module so that slewing could be done first. I never reacted to that because I simply didn't know about this option (or forgot it, maybe I introduced this option myself, but then, I don't remember it at all). When I think about it now, it doesn't make sense since the slewing formula has already a delta TDC parameter so there is no need to do a deltaTDC cal after slewing correction (in principle at least). What I don't understand is the way you can get a width of 1cm with the big tubes when you do slewing before deltaTDC. In this case, the deltaTDC you get after the slewing correction should be very close to zero. So why doing this extra cal ? Also, when the deltaTDC vs large ADC correlation looks so odd, how can you get such a width ? So, it tells me that there either is a software bug or a real hardware problem. But the bug you're talking about sounds really odd to me. Djam -- Djamel Ouerdane ------------------------------------------o | Niels Bohr Institute | Home: | | Blegdamsvej 17, DK-2100 Ø | Jagtvej 141 2D, | | Fax: +45 35 32 50 16 | DK-2200 Copenhagen N | | Tel: +45 35 32 52 69 | +45 35 86 19 74 | | http://www.nbi.dk/~ouerdane | | ouerdane@nbi.dk | o---------------------------------------------------------o _______________________________________________ Brahms-dev-l mailing list Brahms-dev-l@lists.bnl.gov http://lists.bnl.gov/mailman/listinfo/brahms-dev-lReceived on Wed Apr 14 07:14:09 2004
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