FADC Data Format January 13, 2015

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Location and Time

Room: CC F228??

Time: 2pm.

Remote Connection

(if problems, call phone in conference room: 757-269-6460 might not be the correct number)

  1. To join via Polycom room system go to the IP Address: 199.48.152.152 (bjn.vc) and enter the meeting ID: 589693655.
  2. To join via a Web Browser, go to the page [1] https://bluejeans.com/589693655.
  3. To join via phone, use one of the following numbers and the Conference ID: 589693655
    • US or Canada: +1 408 740 7256 or
    • US or Canada: +1 888 240 2560

More information on connecting to bluejeans is here

Specific instructions for connecting via polycom:

  • Turn polycom on if necessary
  • With the polycom, place a call at 199.48.152.152
  • Press # to enable the polycom keypad, then enter the meeting id: 589693655 and #
  • You may have to unmute the microphone: #*4
  • Turn the computer on if needed

Agenda


Useful Links

Minutes

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

  1. New FADCs - Cody has tested all but 1 (which is still in transit) of the 25 new FA125s and found problems with only 2 of them.
  2. Bad FADCs in use - Cody would like to replace these with the new good modules, asked for a list of bad modules. He has Naomi's list of bad channels from run 1286 but it would be useful if someone could run a pulser test over all the modules again.
  3. Early hits - Cody will look at the channels for HVB C8 (roc 28, slot 15, channels 48-71) to investigate why they are 40ns earlier than the rest. (more details here)
  4. Naomi is adding some error-prevention conditions to the new timing module, it returns a rough time (initial hit threshold minus a registered configurable constant) if any of these are met. These include - adc value of 0 or >4095, pedestal above configurable value (suggested 511) and will need an extra bit sent to the module + another register value.
  5. Cody is not confident that he will have the new firmware completed and tested by April and would prefer to fix some problems with the old FA250 firmware first. He will have an estimate of how long that will take at the next meeting. Beni said the run goal is higher rates and the drift chambers cannot use mode 7. The problems to fix are:
    1. remove the extra header and trailer words in the data (one set of these for every 6 channels)
    2. triggers too close together cause overwriting of data.
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