Tue Jan 31 01:37:35 2017, VO HONG HAI, LLD and ULD discriminations,
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Dear Stefan,
Is there any way to develop LLD and ULD discrimination in DSR-4 evaluation board?
Best regards,
V.H.Hai |
Wed Jul 30 11:38:58 2014, Tsutomu Nagayoshi, Sampling speed of DRS4 Board ver4
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Hello!
I have a question concerning the sampling speed of the DRS4 evaluation board.
It is written in the manual that the sampling speed of DRS4 Evaluation Board is supported above 0.7 GHz. |
Wed Jan 17 09:51:16 2018, Tran Cong Thien, The input signals recorded are different with the signal showed in oscilloscope
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Dear Stefan,
I am using an DRS4 board to record the signals from an plastic scintillator detector. It was working really good, yet a few day ago the signals
became "not right". When I checked the signal using an oscilloscope it show the normal signals previously recorded. The signal amplitude |
Thu May 29 04:22:43 2014, Toshihiro Nonaka, CalibrationWaveform
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I'm writing the drs_exam.cpp to use multi-boards(v3, firmware:4.0.0), and taking data succeeded. But I have several questions about function written
in DRS.cpp.
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Wed Apr 27 08:14:14 2016, Toshihiro Nonaka, serial number problem
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Dear all,
I'm using 3 DRS boards simultaneously and their serial numbers are 2169, 2170, 2172 respectively.
Recently however, I obtain serial number "0" by DRSBoard::GetBoardSerialNumber() for #2172 board. |
Wed Apr 27 09:51:37 2016, Toshihiro Nonaka, serial number problem
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The serial number has been fixed by using drscl. Thank you!
Stefan
Ritt wrote:
If dis- and reconnecting the board does not help, there is the (small) |
Wed Jul 12 04:24:39 2017, Toshihiro Nonaka, Time resolution between boards
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Hello,
I 'm using four evaluation boards v.3 to construct the multi-board DAQ system. One channel for each board is used as reference clock, then
calibrate timing offline, which allow below 10ps resolution between boards. |
Fri Feb 26 17:05:26 2021, Tom Schneider, Trouble getting PLL to lock
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Hello,
I am working on a custom PCB design with the DRS4 chip, and I can't get the PLL to lock. I'm feeding CLKIN with a 1MHz CMOS clock
(REFCLK- tied to VDD/2), and I'm using the same loop filter as the eval board. I see from the datasheet that the PLL is enabled by default, |
Fri Feb 26 18:33:52 2021, Tom Schneider, Trouble getting PLL to lock
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Stefan,
Thanks for responding so quickly. Yes I have my clock source going to REFCLK+ (CLKIN is the signal name on my schematic). BIAS is
0.7V exactly, /RESET is high, A0-A3 are 0x0000, and the loop filter has a 4.7nF cap to GND with a 130ohm resistor + 1uF cap in parallel, just like the |
Fri Feb 26 21:24:39 2021, Tom Schneider, Trouble getting PLL to lock
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Probe capacitance makes that tricky - if I put my probe on DSPEED, I see that it starts at approx. 2.5V then gradually decreases until it hits 0V.
DTAP decreases from 3MHz to 0 during this time.
I'll try to get something together to show you. |
Fri Feb 26 22:52:13 2021, Tom Schneider, Trouble getting PLL to lock
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Thats not a simple modification to my PCB, but I'll give it a try. Thanks for your help
Stefan
Ritt wrote:
Sounds to me like your REFCLK is not getting through or your PLL loop |
Thu Mar 4 21:36:14 2021, Tom Schneider, Trouble getting PLL to lock
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I found the problem, and it had nothing to do with the CMOS clock input. As it turns out, even though I was using the default state of the config
register, I still had to write to it after powerup. Once I did that, the PLL locked immediately.
-Tom |
Tue Jan 25 14:15:00 2022, Thomas M., Regarding measuring for a set time
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Hello,
I'm working on a project wherein we're looking at photomultipliers. We've already acquired a DRS4 evaluation board with the intent
of using it to gather our data. |
Tue Jan 25 14:44:49 2022, Thomas M., Regarding measuring for a set time
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Yes, you've got it exactly right. Thank you, that helps a lot!
Thomas
Stefan |
Fri Feb 24 17:34:28 2017, Tarik Zengin, Passing parameters to drscl
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Hi everyone,
I wonder if there is a way to pass parameters to drscl. What I specifically want to do is calling drscl from a shell script and read/save some
data. I want to schedule a measurement. Therefore I need to call drscl from the command line using some parameters. |
Wed Jan 20 12:14:49 2021, Taegyu Lee, drs4 persistence
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Dear all,
I have a question about the function that drs4 can perform.
Is there any function in drs4 that is analogous to that of "persistence display" in oscilloscope?? (accumulating pulses) |
Sat Apr 15 03:48:31 2017, Strahinja Lukic, Wave rotation during transfer from the board?
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I don't know if this question is already documented elsewhere.
I am developing a DAQ code for the DRS evaluation board, v4 for a test beam experiment. I link parts of the existing DRS code as a library.
To understand the effect of various flags used in calls to the functions DRSBoard::GetTime() and DRSBoard::GetWave(), I performed several tests |
Thu Apr 20 06:30:13 2017, Strahinja Lukic, Wave rotation during transfer from the board?
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Thanks.
Strahinja
Stefan |
Tue Feb 27 13:17:00 2018, Steven Block, WIndows Connection problem with drs507 SOLVED
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Hello All,
I too have been struggling with trying to get the drs4 (507) to work on my windows machine and I found it to be a problem with the libusb library.
My solution is as follows and has worked on multiple PC's. I ran this solution after I first plugged in the drs4 and installed 507. |
Tue Feb 27 16:34:26 2018, Steven Block, DRS4 Dead times 6x
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Hello All,
I am currently trying to figure out how to properly characterize the dead time of the DRS4 board. My most recent experiment to try and answer
this question involved using an external trigger that can range from 1Hz to 2MHz. I fed this trigger into the DRS4 and collected 1000 samples with no input |