FA125 Data Format Aug 25, 2015
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Location and Time
Room: CC F326 ?
Time: 2pm.
Remote Connection
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Agenda
- Previous meeting (Aug 11, 2015)
- FADC125 Firmware status
- Driver library status
- Catch up on format spec changes since last meeting:
- Removed combo data types
- Renumbered remaining data types (as 5,6,9) and added window raw data (4)
- Added combo modes (data types 5 or 6 followed by type 4)
- Replaced slot number with NPK in the header for data types 5,6,9
- For the CDC, NPK=1
- Added table to interpret times & quality codes
- Added PL to config parameters
Useful Info
- Timing algorithm wiki page
- Older documents:
- For integral examples see FA125_Data_Format_July_7,_2015#Agenda
Minutes
Present: Naomi (CMU), Cody, Beni, David (JLab)
- FADC125 Firmware status
- Cody has started testing the CDC combo mode using a pulser for input, shared the results with Naomi, and has a list of changes resulting from this
- pedestal ends with sample PED
- check all NW samples are output
- add time of sample subset start *10 to LE_time
- Also there are changes from the latest format spec (listed below) to implement. He will do this in simulation first.
- We decided to keep NE fixed at 20
- The restriction NPK=1 will be made in software, so that the firmware is left more flexible for future development, and more similar to the FDC version which will aid maintenance.
- If a peak is flat-topped, the maximum amplitude sample should be the first sample at the top.
- Cody questioned the need for PL>=NW, he will look to see if this is really necessary
- Cody has started testing the CDC combo mode using a pulser for input, shared the results with Naomi, and has a list of changes resulting from this
- Driver library status
- Naomi, Cody and Beni have all started using the software library. Cody used mode 6 to get the CDC combo mode output. The current version is for firmware 2.01 but Bryan also has the next version (for format 6.5) ready.
- Naomi requested a function fa125SetCommonTimingThreshold to set the same timing thresholds on all channels on one fadc.
- Beni said he found that the first event read out was weird, not in the correct format.
- Format spec changes since last meeting (latest version is 6.5):
- Removed combo data types
- Renumbered remaining data types (as 5,6,9) and added window raw data (4)
- Added combo modes (data types 5 or 6 followed by type 4)
- Replaced slot number with NPK in the header for data types 5,6,9
- For the CDC, NPK=1
- Added table to interpret times & quality codes
- Added PL to config parameters
- All the 'check with Cody' explanatory points marked in the spec were clarified & will be added to the next version. These are all descriptions, with no changes to the format entailed.
- Next meeting: 2pm Tues Sept 8th.