Difference between revisions of "FADC Data Format Mar 25, 2014"
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= Location and Time = | = Location and Time = | ||
| − | '''Room:''' CC | + | '''Room:''' CC F226 |
'''Time:''' 1:30pm-2:30pm | '''Time:''' 1:30pm-2:30pm | ||
| Line 13: | Line 13: | ||
* [[FADC Data Format Mar 11, 2014|Previous meeting (Mar. 11, 2014)]] | * [[FADC Data Format Mar 11, 2014|Previous meeting (Mar. 11, 2014)]] | ||
* Status of FADC125 Firmware | * Status of FADC125 Firmware | ||
| + | |||
| + | |||
| + | == Useful Links == | ||
* [http://www.jlab.org/Hall-D/detector/fdc/FDC_pulse_data_format.pptx FDC_pulse_data_format] | * [http://www.jlab.org/Hall-D/detector/fdc/FDC_pulse_data_format.pptx FDC_pulse_data_format] | ||
* [[CDC_algo|CMU timing algorithm - details updated]] | * [[CDC_algo|CMU timing algorithm - details updated]] | ||
* [[CDC_readout_requirements|CDC readout needs]] [[CDC_garfield_calcs|Garfield calcs]] | * [[CDC_readout_requirements|CDC readout needs]] [[CDC_garfield_calcs|Garfield calcs]] | ||
| − | * [ | + | * [https://halldweb.jlab.org/doc-private/DocDB/ShowDocument?docid=2274 fADC125 Data Format Specification Document] |
| + | |||
=Minutes= | =Minutes= | ||
| − | Attendees: '' | + | Attendees: ''David L.(chair), Cody D., Naomi J., Beni Z.'' |
| + | |||
| + | * Errors due to system clock running at 80MHz | ||
| + | * Many problems resolved by reducing to 40MHz | ||
| + | * Could increase some, but it will take a little more work | ||
| + | * All FDC and CDC modules are installed and tested in Raw mode | ||
| + | ** CDC not installed yet so not reading out anything from it | ||
| + | * Beni would like to have a firmware version that reads out 170 samples in the window | ||
| + | ** Cody will work on getting a firmware version with registers that allow Beni to set window width and offset | ||
| + | ** This won't really be needed before the CDC is hooked up (couple of weeks?) | ||
| + | * We need to confirm how many samples are used for pedestal in the f250 firmware and where this number as well as the number used for the integral are stored. | ||
| + | * Beni noted that previously, he'd observed 50MHz noise | ||
| + | ** In order to minimize affect, the pedestal and integral should have a width that is close to an integral number of the characteristic wavelength. | ||
| + | ** If we integrate 8 samples, that would be 64 ns or 1.5 wavelengths (i.e. optimally bad) | ||
| + | * Naomi sent a C++ version of her timing algorithm to Mike (?) | ||
| + | ** Discovered one small error in the VHDL code in the process and sent an fixed version to Cody | ||
| + | * Naomi continues the Garfield calculations and will report in more detail in the future | ||
| + | ** 400 MeV/c protons at 23<sup>o</sup> | ||
Latest revision as of 17:04, 24 February 2017
Location and Time
Room: CC F226
Time: 1:30pm-2:30pm
Remote Connection
ESNet: 8542553
(if problems, call phone in conference room: 757-269-6460)
Agenda
- Previous meeting (Mar. 11, 2014)
- Status of FADC125 Firmware
Useful Links
- FDC_pulse_data_format
- CMU timing algorithm - details updated
- CDC readout needs Garfield calcs
- fADC125 Data Format Specification Document
Minutes
Attendees: David L.(chair), Cody D., Naomi J., Beni Z.
- Errors due to system clock running at 80MHz
- Many problems resolved by reducing to 40MHz
- Could increase some, but it will take a little more work
- All FDC and CDC modules are installed and tested in Raw mode
- CDC not installed yet so not reading out anything from it
- Beni would like to have a firmware version that reads out 170 samples in the window
- Cody will work on getting a firmware version with registers that allow Beni to set window width and offset
- This won't really be needed before the CDC is hooked up (couple of weeks?)
- We need to confirm how many samples are used for pedestal in the f250 firmware and where this number as well as the number used for the integral are stored.
- Beni noted that previously, he'd observed 50MHz noise
- In order to minimize affect, the pedestal and integral should have a width that is close to an integral number of the characteristic wavelength.
- If we integrate 8 samples, that would be 64 ns or 1.5 wavelengths (i.e. optimally bad)
- Naomi sent a C++ version of her timing algorithm to Mike (?)
- Discovered one small error in the VHDL code in the process and sent an fixed version to Cody
- Naomi continues the Garfield calculations and will report in more detail in the future
- 400 MeV/c protons at 23o
