 Tue May 23 10:24:47 2017, Stefan Ritt, Invalid magic number 0000
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Under linux, many people observed that the USB connection is unstable to the evaluation board. This must be related to the linux USB stack, since my
code runs fine under MacOSX and Windows, where I use the same USB library (libusb-1.0). So I can't do anything from my side. Baybe the linux system
has some tools to reset an USB endpoint. I googled it and found some proposals here: |
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Fri May 26 08:48:25 2017, Stefan Ritt, Invalid magic number 0000
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There is no other way to reset the board. As I said, people running this under Windows or MacOS are fine, so maybe this calls for a change of OS.
Esperienza
Giove wrote:
Hello, thanks for your answer. Unluckily if i try to reset in this |
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Tue May 30 21:00:26 2017, Stefan Ritt, Setting input range
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See elog:531
Esperienza
Giove wrote:
Hello, |
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Thu Jun 8 15:52:20 2017, Stefan Ritt, AND Trigger problems with 2-3 channels
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Can you post a screenshot where I can see the channel waveforms, the configuration and the trigger settings?
Stefan
Rebecca |
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Thu Jun 22 21:36:08 2017, Stefan Ritt, AND Trigger problems with 2-3 channels
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Hi,
from our screenshots I see the following:
- you have sometimes a huge oscillation in your preamplifier. Fix this first before doing any waveform recording |
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Fri Jul 7 10:31:47 2017, Stefan Ritt, Trigger setting (AND AND) OR (AND AND)
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Unfortunately not with the current firmware.
Stefan
Esperienza |
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Wed Jul 12 20:16:05 2017, Stefan Ritt, Time resolution between boards
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Yes this should be possible.
Stefan
Toshihiro |
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Mon Oct 2 16:08:05 2017, Stefan Ritt, Event acquisition pace for irregular timing
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As written in the documentation, the DRS evaluaiton board has a maximum trigger capability of ~500 Hz. This is limited by the USB bus which has a finite
data transfer rate. If you build your own electronics around the chip (like many other groups are doing), you can squeeze this to a few kHz, but it is
some development effort. |
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Mon Oct 16 15:35:22 2017, Stefan Ritt, Raspberry Pi Connection Failure
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Have you tried as root? Maybe you miss some permissions.
Stefan
Jonathan |
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Wed Oct 18 09:12:26 2017, Stefan Ritt, Time offset
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No this is not possible. But you can delay your signal externally (like with a delay cable or electronically) and then send the dealyed signal to the
evaluation board for triggering.
Stefan |
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Fri Nov 3 13:28:04 2017, Stefan Ritt, Triggering using AND
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Think about: How would you make a coincidence (AND) between two edges? Since an edge is infinitesimally small, there is no way to make a meaningful coincidence
between edges. Therefore, the DRS4 EB firmware makes a simple AND of levels. If you trigger on rising signals and do an AND, then you get a trigger if
both values are above their threshold. For falling edge trigger (arrow goes down in the trigger configuration) the board triggers when both signals are |
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Wed Nov 22 08:48:36 2017, Stefan Ritt, using of the DRS Command Line Interface
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The command line interface is more a debugging tool for experts, and you are not supposed to use it except to test the connection to the evaluation board.
The programs for the user are the DRS Oscilloscope and the drs_exam.cpp example program to read out the board with your own program.
Stefan |
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Wed Nov 22 09:14:18 2017, Stefan Ritt, using of the DRS Command Line Interface
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Remove the check mark from the "Lock" box and enter a different value in the sampling speed box and hit return.
chen
wenjun wrote:
OK!Thank you! One more question,when I use the Oscillocope ,I found |
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Wed Nov 22 14:52:31 2017, Stefan Ritt, Averaging capabilities
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This feature is not yet implemented. The (disabled) software swtich is more like a kind of a reminder to myself to work on that one day...
Diego
Yankelevich wrote:
The Display window in the Oscilloscope software shows averaging |
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Tue Dec 12 13:58:06 2017, Stefan Ritt, External trigger using Raspberry Pi
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Indeed the code does not work for the current evaluation board, it has been written for a previous version and never been updated. Please use following
code to enable the external trigger
/* use following lines to enable the external trigger */ |
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Wed Dec 20 16:21:42 2017, Stefan Ritt, cascading -- DRS4 Osci.cpp & DRS.cpp
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First you need a board which is modified in hardware to support channel cascading. Basically there are internal resistors which connect each input connector
to two channels. You have to specify this when you order the board. Then you can use the new drs_exam_2048.cpp file contains in the git repository which
correctly configures and reads out the board in two-channel cascading mode. Putting all 8 channels together is not supported by the evaluation boards. |
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Wed Dec 20 22:14:35 2017, Stefan Ritt, cascading -- DRS4 Osci.cpp & DRS.cpp
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https://bitbucket.org/ritt/drs4eb
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Wed Jan 17 10:09:09 2018, Stefan Ritt, The input signals recorded are different with the signal showed in oscilloscope
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First thing is to do another voltage calibration. Disconnect input, "Config", "Execute Voltage Calibration". If this does not fix
the problem, the board is probably broken. This can happen if you send very high input singals to the board (like >10V) and exceed the maximul allowed
limit from the datasheet. In that case the board needs to be repaired. Please contact me directly (via email) so that we can make you a quote. |
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Thu Jan 25 08:00:16 2018, Stefan Ritt, problem with the drscl(drs507)
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This problem has been reported by several people, like elog:551
So far I could not solve it. On the computers at our lab it works find so I cannot reproduce and fix the problem. One suspicion I have is that
the underlying libusb library needs to be updated. You can try to install the newest version from their website at http://libusb.info/, but I haven't |
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Tue Feb 27 13:29:47 2018, Stefan Ritt, WIndows Connection problem with drs507 SOLVED
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Dear Steven, many thanks for this information, this is very useful. I know of people having problems on Windows 10, maybe this will also help them.
Stefan
Steven |