AIDA GELINA BRIKEN nToF CRIB ISOLDE CIRCE nTOFCapture DESPEC DTAS EDI_PSA 179Ta CARME StellarModelling DCF K40
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Message ID: 407     Entry time: Sat Oct 29 07:26:59 2016
Author: TD 
Subject: AIDA ADC & disc data synchronisation check 
Following analysis of AIDA ADC & disc readout ( see https://elog.ph.ed.ac.uk/AIDA/404 )
changed timestamp resolution from 1us/channel to 20.48us/channel


Offline sort (from disk file)

Attachments 1-3  s1-s32  # ADC data items per FEE64, s100-132  # disc data items per FEE64 (20.48us/channel)

Attachments 4-5  s1000   4 * ( module # - 1 ) + ASIC # versus timestamp (ch 0-95 ADC data, ch 100-195 disc data,
20.48us/channel)

Attachments 6-7  MIDASsort terminal session logs for *offline* sort


Online sort (from TapeServer)

Attachment 8     s1-s32  # ADC data items per FEE64, s100-132  # disc data items per FEE64 (20.48us/channel)

Attachments 9-10 s1000   4 * ( module # - 1 ) + ASIC # versus timestamp (ch 0-95 ADC data, ch 100-195 disc data,
20.48us/channel)

Attachments 11-12 MIDASsort terminal session logs for *online* sort

Attachment 13   MIDASsort FORTRAN sort routine sync.f

Attachment 14   Spectrum titles for the above sort routine

Note

1) data is discontinuous as a function of timestamp because we are sampling buffers
from the TapeServer rather than sorting all data as above
2) a low rate of timewarps is reported which appears to be an artifact of the buffer
sampling - no timewarps reported by analyses of the corresponding data files
 
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