FADC Data Format February 3, 2015

Location and Time

Room: CC F228??

Time: 2pm.

Remote Connection

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Agenda

• Previous meeting (Jan 27, 2015)
• Status of FADC125 Firmware

Useful Links

• Timing algorithm - updated to include latest revisions
• fADC125 Data Format Specification Document
• Data format for 250 modes on fADC125 from Cody, Aug 15 2014
• FA250 modes 2 from Ed and Hai, Feb 18 2014
• FIRMWARE for FADC250 Ver2 ADC FPGA, Sept 2014?
• FDC_pulse_data_format
• CDC readout needs Garfield calcs
• CDC_run_985 CDC_run_970

Minutes

Present: Naomi (CMU), Beni, David, Cody, Lubomir, Sergey (JLab)

1. Cody has incorporated Naomi's new module into the fa125 firmware and it synthesized successfully, there are a few other issues to sort out but the timing module looked ok, he will try the q>0 test pulses in simulation and then return to working on the architecture.
2. Naomi updated the CDC_algo wiki page to be consistent with the new code which Cody has and the C++ code sent to David. This will next be moved into the format document. She is working on producing some illustrative plots. We discussed the error code table a little.
3. Cody is still working on the FA250-modified firmware regarding the trigger times. There are limitations on the shortest interval between trigger times in multi-block mode which depend on the data mode and window size, he will try to quantify these, and needs to set up a separate simulator. He asked if we need to record high rate data in raw mode; Beni and David answered yes, one of the goals of the next run period is high-speed writing to tape, aiming for 15kHz with < 50% deadtime.
4. The FA250-modified firmware now writes one set of trigger time header words per event, not per FPGA chip.
5. The faulty FA125s have been replaced and the CDC now has all 3552 channels working.
6. Beni will let us know if he needs anything for the collaboration meeting talk.